bluuebunny/crossref_metadata_2025 huggingface dataset:
Eksplorasi Sumber Genetik Abaca di Kepulauan Sangihe-Talaud
Authors: Setyo-Budi Untung , Heliyanto B. , Sudjindro NFN
Published: February 2017

Abstract

Exploration was conducted to be used for genetic variation improvement of abaca germplasm. It was performed at Sangir Besar Island in Sangihe Achipilago and Karakelang Island in the Talaud Archipilago, both of them were located in the teritorial of Sangihe-Talaud District of North Sulawesi Province, in September 1999. Result indicated that Sangihe-Talaud District had many species of abaca introduced from Philippina. Fifteen accessions of abaca were collected. The difference characters of each accession were identified by stem colour, bloom shape and colour, stem height and diameter, and fibre strength. Those accessions were conserved in the RITFC’s Experimental Garden for characterization and evaluation.

Abstrak

Untuk memperluas keragaman sumber daya genetik tanaman abaca, telah dilakukan eksplorasi di Pulau Sangir Besar di gugusan Kepulauan Sangihe, dan di Pulau Karakelang di gugusan Kepulauan Talaud, Kabupaten Sangihe-Talaud, Propinsi Sulawesi Utara, pada bulan September 1999. Dari eksplorasi tersebut diketahui bahwa di Kabupaten Sangihe-Talaud, Propinsi Sulawesi Utara khususnya di Pulau Sangir Besar dan Pulau Karakelang, banyak terdapat jenis abaca yang diduga berasal dari Filipina. Diperoleh 15 aksesi abaca dari kedua pulau tersebut. Perbedaan yang mencolok dari masing-masing aksesi terletak pada karakter warna batang, warna dan bentuk jantung, tinggi dan diameter batang serta kekuatan seratnya. Aksesi-aksesi tersebut ditanam di kebun plasma nutfah Balittas untuk karakterisasi dan evaluasi.
Kajian Ekologi Permudaan Saninten (Castanopsis argentea (Bl.) A.DC.) di Taman Nasional Gunung Gede Pangrango, Jawa Barat
Authors: Heriyanto N. M. , Sawitri Reny , Subandinata Didi
Published: February 2017

The study of population and distribution of saninten (Castanopsis argentea (Bl.) A.DC) seedling was conducted in August 2003 at block Pasarean, Cibodas Resort, Gede Pangrango National Park. The square inventory of 20 plots sizing at 2 x 2 m for seedling level and 20 x 20 m for tree level. Regeneration analysis were laid down at 1,300, 1,400, 1,500, 1,600, and 1,700 m asl. The research showed that the species composition of seedling communities at 1,300 and 1,600 m asl was kileho (Saurauia pendula Bl.), at 1,400 and 1,700 m asl was huru (Litsea sp.) and at 1,500 m asl was nangsi (Villebrunea sp.). The highest density distribution of tree and seedling stage of saninten were at 1,400 m asl which were 18 trees/ha and 833 seedlings/ha with dominance index of 0.06. While the highest of species diversity index occured at 1,300 m asl about 3.34 with 35 invidual species. More over, based on altitudinal sites, the value of index similarity was occured between 1,600 m asl and 1,700 m asl was 65.24%.

 

Abstrak

Kajian populasi dan penyebaran anakan saninten (Castanopsis argentea (Bl.) A.DC) dilakukan pada Agustus 2003 di blok Pasarean, Resort Cibodas, Taman Nasional Gunung Gede Pangrango. Pengumpulan data dilakukan dengan menggunakan metode kuadrat bujur sangkar 2 x 2 m, sedangkan untuk tingkat pohon hanya jenis saninten. Ukuran petak yang digunakan 20 x 20 m. Petakan untuk semai terletak di salah satu sudut dalam petak untuk pengukuran pohon. Penelitian dilakukan pada ketinggian tempat 1.300, 1.400, 1.500, 1.600, dan 1.700 m, dpl. Petakan dibuat pada setiap ketinggian tempat sebanyak 20 petak. Hasil penelitian menunjukkan bahwa jenis yang mendominasi komunitas tumbuhan tingkat semai adalah kileho (Saurauia pendula Bl.) yang mendominasi pada ketinggian 1.300 dan 1.600 m dpl, huru (Litsea sp.) mendominasi semai pada ketinggian 1.400 dan 1.700 m dpl, dan nangsi (Villebrunea sp.) mendominasi semai pada ketinggian 1.500 m dpl. Penyebaran terluas pohon dan semai saninten pada ketinggian tempat 1.400 m dpl, yaitu 18 pohon dan 833 anakan/ha. Nilai dominansi tertinggi tingkat semai dimiliki oleh ketinggian tempat 1.400 m dpl dengan indeks dominansi 0,06. Nilai indeks keanekaragaman jenis tertinggi dimiliki oleh ketinggian tempat 1.300 m dpl yang mempunyai keanekaragaman jenis sebesar 3,34 dengan 37 jenis individu. Nilai kesamaan komunitas (IS) tertinggi komunitas semai terdapat antara ketinggian tempat 1.600 dan 1.700 m dpl sebesar 65,24%.
Growth Response of Calopogonium caeruleum and Centrosema pubescens Ground Cover Crops toward Inoculation of Bradyrhizobium, Aeromonas punctata, and Acaulospora tuberculata
Authors: Widiastuti Happy , Suharyanto NFN
Published: February 2017

Planting of leguminous cover crops is a standard practise in preparing land for oil palm and rubber plantations. The synergism capability of Bradyrhizobium, Aeromonas punctata (phosphate solubilizing bacteria) and Acaulospora tuberculata (AM fungi) to increase growth of leguminous cover crops (Calopogonium caeruleum and Centrosema pubescens) was studied in a glass house experiment using polybag (10 x 10 cm) containing acid soil with low level nutrition of Ciomas, Bogor. Research results showed that Bradyrhizobium, A. punctata and A. tuberculata inoculation on C. caeruleum signifycantly enhanced plant height, and number of leaves. However, the treatment did not increase biomass and N, P, and K uptake of plant. Number of nodule were increase when the plant was inoculated with A. tuberculata alone or in combination with Bradyrhizobium and A. punctata. Centrosema pubescens gave good response when inoculated with A. tuberculata. However, dual inoculation of the two bacteria Bradyrhizobium and A. punctata with A. tuberculata signifycantly enhance plant height, plant biomass, N, P, and K plant uptake.

 

Abstrak

Penanaman tanaman kacang-kacangan penutup tanah merupakan standar dalam penyiapan lahan pada pengusahaan kelapa sawit dan karet. Kemampuan sinergisme Bradyrhizobium (bakteri penambat N2), Aeromonas punctata (bakteri pelarut fosfat), dan Acaulospora tuberculata (cendawan mikoriza arbuskula) untuk meningkatkan pertumbuhan tanaman kacangkacangan penutup tanah (Calopogonium caeruleum dan Centrosema pubescens) dipelajari dalam percobaan rumah kaca menggunakan polibag berukuran 10 x 10 cm berisi tanah Ciomas Bogor yang bereaksi masam dan miskin hara. Hasil penelitian menunjukkan bahwa inokulasi Bradyrhizobium, A. Punctata, dan A. tuberculata pada C. caeruleum nyata meningkatkan pertumbuhan tinggi tanaman dan jumlah daun. Namun, perlakuan ini tidak meningkatkan biomasa dan serapan N, P, dan K tanaman. Jumlah bintil akar meningkat pada tanaman yang diinokulasi A. tuberculata sendiri atau dalam kombinasinya dengan Bradyrhizobium dan A. punctata. Centrosema pubescens menunjukkan respon yang baik bila diinokulasi dengan A. tuberculata. Bagaimanapun juga inokulasi dua bakteri, yaitu Bradyrhizobium and A. punctata yang disertai A. tuberculata nyata meningkatkan tinggi tanaman, biomasa, serapan N, P, dan K tanaman.
Karakter Morfologis dan Beberapa Keunggulan Mangga Podang Urang (Mangifera indica L.)
Authors: Baswarsiati NFN , Yuniarti NFN
Published: February 2017

Podang Urang mango is one of the local superior fruit from Kediri regency, East Java. This mango has atrractive appearance with red-orange skin colour, orange flesh, beautiful shape, medium size (about 200-250 g per fruit), sweet taste, strong smell, soft fibre and enough water content, so that it is appropriate for both fresh and processed fruit. Although most of the plants are hundred years old, they can produce about 60- 200 kg mango per tree. Podang variety has been developed in East Java, especially in Kediri regency with total plants as many as 524.126 trees in Kediri. They were planted on hilly land as conservation plants as well as homeyard plants. The mango have good market at national level, especially in the big cities and has been exported in a small quantity to Singapore. It’s appearance seems suitable to the demands of consumers from Korea, Japan, and Singapore, so that there will be a large opportunity for export. Based on those prospective chances, this mango variety should be produced in large scale to supply export market. Lack of promotion was one of the key factor that limit the market of this mango.

 

Abstrak

Mangga Podang Urang merupakan salah satu produk buah unggulan lokal dari Kabupaten Kediri, Jawa Timur. Kekhasan yang dimiliki oleh mangga Podang Urang terutama adalah pada penampilan warna kulit buah merah jingga menarik, daging buah jingga, bentuk buah cantik, ukuran buah tidak terlalu besar (sekitar 200-250 g/buah), rasa buah manis, aroma buah tajam, serat halus, dan cukup banyak mengandung air sehingga sesuai untuk buah segar maupun olahan. Walaupun rata-rata tanaman telah berumur ratusan tahun, namun mampu berproduksi sekitar 60-200 kg/pohon. Saat ini tanaman mangga Podang telah berkembang di Kabupaten Kediri dengan jumlah tanaman 524.126 pohon, berada di perbukitan sebagai tanaman konservasi pada lahan kering dan sebagai tanaman pekarangan yang di antaranya terdapat mangga Podang Urang. Mangga Podang Urang tampaknya sesuai dengan permintaan konsumen dari Korea, Jepang, dan Singapura yang menyukai mangga berpenampilan menarik dengan rasa buah campuran manis dan sedikit masam. Saat ini pemasaran buah mangga Podang Urang sudah berkembang di Jawa Timur dan di provinsi lainnya. Tampaknya mangga Podang Urang mempunyai pangsa pasar yang baik di tingkat nasional dan perlu terus dikembangkan untuk memenuhi kebutuhan pasar ekspor. Mangga Podang Urang sudah diekspor ke Singapura dan perlu dikembangkan lagi ke beberapa negara lainnya.
Variasi Morfologi dan Virulensi Phytophthora capsici Asal Lada
Authors: Wahyuno Dono , Manohara Dyah , Susilowati Dwi N.
Published: February 2017

Phytophthora capsici is the most important plant parasitic fungus causes stem rot disease in black pepper cultivation in Indonesia. The objective of the present study was to observe morphological variation and virulence of Phytophthora isolated on black pepper from various areas in Indonesia. Fifty isolates of Phytophthora were observed under light microscope. The observed morphological characteristics of each isolate, i.e. sporangiophore branching type, colony type, mating type and shape of sporangium after they were grown in growth medium of V8 juice agar, while length and width of sporangium, length of sporangiophore, and papilla were measured by micrometer. The variation of their virulence was observed by inoculating the hypha of each isolate on detached leaves of black pepper that incubated in damped boxes in room conditions. The width of necrotics were measured with leaf area meter after incubated for four days. The results indicated, those morphological characteristics of the isolates were vary in size, shape, colony pattern, mating type and sporangiophore branching pattern, which those characteristics were belong to P. capsici. Those morphological characteristics were not related with the mating type, isolated plant parts and its geographic distribution. The virulence of the tested isolates were also vary from low to high, and their virulence were also not related with the mating type, isolated plant parts and its geographic distribution.

 

Abstrak

Phytophthora capsici merupakan cendawan penyebab penyakit busuk pangkal batang yang paling banyak menimbulkan kerusakan pada tanaman lada di Indonesia. Penelitian ini bertujuan untuk mengamati variasi morfologi dan virulensi Phytophthora yang diperoleh dari berbagai lokasi pertanaman lada di Indonesia. Setelah ditumbuhkan pada media V8 jus agar, sebanyak 50 isolat Phytophthora diamati karakteristik morfologinya di bawah mikroskop cahaya, yang meliputi tipe percabangan tangkai sporangium, tipe koloni, tipe kawin, dan bentuk sporangium. Pengukuran panjang dan lebar sporangium, tangkai sporangium, dan papilla dilakukan menggunakan micrometer. Variasi virulensi yang ada diamati dengan cara menginokulasikan potongan hifa dari setiap isolat pada helaian daun lada, kemudian diinkubasi di dalam kotak yang lembab dan diletakkan di suhu ruang. Setelah diinkubasi selama empat hari, luas nekrose yang terjadi diukur menggunakan leaf area meter. Hasil pengamatan menunjukkan adanya variasi karakterisitik morfologi dari setiap isolat pada tipe koloni, tipe kawin, percabangan sporangium, ukuran, dan bentuk sporangium. Semua isolat menunjukkan karakteristik P. capsici. Variasi morfologi yang ada tidak berkaitan dengan tipe kawin, asal bagian tanaman yang diisolasi, dan geografi asal isolat. Lima puluh isolat P. capsici juga bervariasi virulensinya, dari rendah sampai tinggi. Variasi virulensi tersebut juga tidak berkaitan dengan tipe kawin, asal bagian tanaman yang diisolasi maupun geografi asal isolat.
Karakterisasi dan Seleksi 139 Galur Kentang
Authors: Gaswanto Redy , Kusmana NFN
Published: February 2017

Characterization and Selection of 139 Potato Lines. One of the ways of increasing genetic variability in potato is interspecific hybridization to obtain new potato lines. This lines should then be characterized and used to obtain new breeding materials for potato breeding program. A total of 139 potato lines were planted at Cibodas-Lembang (1,300 m asl), from June 2004 to October 2004 without replication with population number of 5 plants per line. The result showed that (1) Generally the planted lines were round tuber shape (61.9%), yellow skin (98.6%), shallow eyes (71.2%), and light tuber weight per plant (89.2%); (2) 18 potato lines were selected as new breeding materials (13%).

 

Abstrak

Salah satu cara untuk menciptakan keragaman genetik pada tanaman kentang adalah melalui hibridisasi antarspesies. Selanjutnya dilakukan karakterisasi galur yang dihasilkan. Diharapkan hasil karakterisasi dapat digunakan sebagai materi dalam perakitan varietas baru. Penanaman galur kentang hasil hibridisasi dilakukan di Cibodas, Lembang (1.300 m dpl), pada bulan Juni-Oktober 2004. Jumlah materi yang ditanam sebanyak 139 galur kentang, tanpa ulangan, dengan jumlah populasi sebanyak lima tanaman per galur. Hasil karakterisasi menunjukkan bahwa (1) secara umum galur yang ditanam mempunyai umbi berbentuk bulat (61,9%), berwarna kuning (98,6%), mata dangkal (71,2%), dan bobot umbi ringan (89,2%); (2) sebanyak 18 galur (13%) terpilih untuk digunakan sebagai materi pemuliaan lebih lanjut.
Peranan dan Dominasi Varietas Unggul Baru dalam Peningkatan Produksi Padi di Jawa Barat
Authors: Nurhati Indah , Ramdhaniati S. , Zuraida N.
Published: February 2017

New released variety as a technology component contributed most to increased rice production. So far, in Indonesia have been released 184 varieties of rice included introduced variety from IRRI. In West Java, up to 2002, IR64 variety still dominated 42% area of lowland rice, followed by Way Apo Buru variety 19.1%, Ciherang 12.7%, Widas 6.9%, Cilamaya Muncul 2.3%, Memberamo 2.2%, and Cisadane 1.8%. Since 2004, Ciherang variety gradually replaced IR64. Several releaseed varieties such as Cigeulis, Situ Bagendit, and Mekongga started to be grown and widely accepted by farmer in Subang, Indramayu, Purwakarta, Cianjur, and Tasikmalaya. Rice productivity under lowland rice in West Java for the last five years is 5.31 t/ha and the lowest productivity was 5.15 t/ha achieved in year 2001 and the highest productivity was 5.50 t/ha in year 2003.

 

Abstrak

Varietas unggul baru merupakan komponen teknologi yang memberikan kontribusi terbesar terhadap peningkatan produksi padi. Hingga tahun 2004 Indonesia telah melepas 184 varietas unggul padi, termasuk varietas introduksi dari IRRI. Di Jawa Barat hingga tahun 2002, varietas IR64 masih mendominasi 42% areal pertanaman padi sawah, kemudian diikuti oleh varietas Way Apo Buru 19,1%, Ciherang 12,7%, Widas 6,9%, Cilamaya Muncul 2,3%, Memberamo 2,2%, dan Cisadane 1,8%. Pada tahun 2004, varietas Ciherang menggeser dominasi varietas IR64 dan terus berlanjut sampai saat ini. Beberapa varietas unggul yang baru dilepas seperti Cigeulis, Situ Bagendit, dan Mekongga mulai diminati petani dan berkembang di Kabupaten Subang, Indramayu, Purwakarta, Cianjur, dan Tasikmalaya. Produktivitas padi sawah di Jawa Barat selama lima tahun terakhir rata-rata 5,31 t/ha dengan produktivitas terendah 5,15 t/ha pada tahun 2001 dan tertinggi 5,50 t/ha pada tahun 2003.
Karakterisasi dan Evaluasi Aksesi Pepaya Introduksi
Authors: Sudjijo NFN
Published: February 2017

New varieties of papaya can be obtained from the exploration of germplasms, conventional breeding, genetic engineering and the introduction of new cultivars from overseas. This study was conducted at Sumani Experimental Field of the Indonesian Tropical Fruit Research Institute from April 2006 to March 2007. This study aimed at characterizing papaya accessions based on their morphological characters listed as descriptor published by IBPGR (1988). The plant materials used were 3 accessions, of papaya introduced from India, namely SR-01, SR-02, SR-03, and 1 local variety. From three papaya accessions observed, SR-03 produced ideal fruit size (840 g), sweet (13.21o Brix of total soluble solid), firm flesh texture, 25.20 mm of pulp thickness, orange to red flesh colour. This accession was promising for further development.

 

Abstrak

Plasma nutfah merupakan salah satu subtansi sumber daya genetik yang dapat dimuliakan untuk merakit varietas baru. Sumber plasma nutfah dapat diperoleh melalui rekayasa genetika, eksplorasi maupun introduksi. Penelitian dilaksanakan di Kebun Percobaan Sumani, Balai Penelitian Tanaman Buah Tropika, menggunakan material benih tiga aksesi pepaya introduksi dari India, terdiri dari (SR-01, SR-02, SR-03) dan 1 varietas lokal, dimulai dari bulan April 2006-Maret 2007. Penelitian bertujuan untuk memperoleh data base karakter dari aksesi pepaya tersebut. Metode penelitian menggunakan Descriptor List for Papaya. Dari hasil pengamatan diperoleh data bahwa nomor aksesi SR-03 memiliki ukuran buah ideal, rasa manis, kenyal, dan berproduksi sepanjang tahun, bobot buah 840 g, tebal daging 25,2 mm, padatan total terlarut (PTT) 13,21o Brix, warna jingga.
Karakterisasi dan Pemanfaatan Plasma Nutfah Jeruk In Situ oleh Masyarakat Lokal Sumatera Utara
Authors: Simatupang Sortha
Published: February 2017

Characterization and utilization of in situ citrus germplasm of collection maintained by local community. This study was aimed at characterizing of in situ citrus germplasm collection and their use. This Study was conducted through interviewing citrus retailers as well as communinity leaders from January- December 2004. There were 33 citrus accescions found in this study. Local communinity utilized citrus in several different ways such as traditional medicine, ingredient of processed food as well as consumed as fresh fruit. Five accescions such as Laukawar, Keprok Sipirok, Boci, Maga, and Keling were sweet and juicy. In addition, Laukawar and Boci, both are seedless. There were four accescions, Andaliman, Purut, Sate, and Gajah having strong citrus scent. Lemon Tea, Nipis, seedless Nipis, Begu, Purut, Sunde, and Sate were used as ingredient of processed food. Gajah, Purut, Pagar, Malem, Kuku Harimau, Kersik, Kapas, Kayu, Puraga, and Kelele were used as traditional medicine. Keling Karo had highest vitamin C content (12 mg/100 mg). Laukawar had the highest total soluble solid. Bunian seemed to be salt tolerant one grown in mangrove area.

 

Abstrak

Penelitian bertujuan untuk mendapatkan karakterisasi plasma nutfah jeruk in situ dan pemanfaatannya oleh masyarakat lokal Sumatera Utara. Metode yang digunakan adalah eksplorasi. Wawancara terbuka tanpa kuesioner dilakukan pada pedagang jeruk yang dikros cek dengan para sesepuh masyarakat lokal. Survei dilakukan pada bulan Januari sampai Desember 2004. Dari eksplorasi diperoleh 33 aksesi jeruk di Sumatera Utara yang terpelihara secara in situ. Masyarakat lokal memanfaatkannya sebagai obat tradisional, bahan campuran olahan pangan, dan sebagai buah segar. Lima aksesi mempunyai rasa manis dan berair, yaitu jeruk Laukawar, Keprok Sipirok, Boci, Maga, dan Keling. Laukawar dan Boci adalah jeruk tanpa biji untuk konsumsi segar. Jeruk yang mempunyai aroma sangat kuat adalah Andaliman (skor 9), jeruk Purut, jeruk Sate, dan jeruk Gajah (skor 8). Jeruk olahan untuk campuran pangan, yaitu Lemon Tea, Nipis, Nipis Tanpa Biji, Begu, Purut, Sunde, dan Sate. Jeruk untuk obat tradisional adalah Gajah, Purut, Pagar, Malem, Kuku Harimau, Kersik, Kapas, Kayu, Puraga, dan Kelele. Kandungan vitamin C tertinggi terdapat pada jeruk Keling Karo (12 mg/100 mg). Jeruk dengan padatan total terlarut tertinggi terdapat pada jeruk Laukawar (15oBrix). Terdapat satu aksesi jeruk yang toleran salinitas, yaitu jeruk Bunian, yang tumbuh di daerah mangrove.
Karakterisasi dan Evaluasi 10 Aksesi Salak di Sijunjung Sumatera Barat
Authors: Sudjijo NFN
Published: February 2017

The study was conducted at the farmer’s field in Ujung Batu Sijunjung, West Sumatera using local Salacca cultivars developed from crossing between cultivar Pondoh as female plant and indigenous salak of Sumatera as male plant. This study was held from January 2003 until December 2005. The objective of this study was to develop database of Salacca characters by exploration method and using data passport model. The research result showed that five accessions with yellowish white fruits and the other five accessions with white fruits. The plant that produced fruit with good quality was SNJ-01 and thick flesh (0.57 cm), sweet (18,00oBrix in TSS), crispy, yellowish white in color and contains water 77.02%.

 

Abstrak

Penelitian ini dilakukan di kebun petani Desa Ujung Batu Kabupaten Sijunjung Sumatera Barat dengan menggunakan materi tanaman salak yang ada di daerah tersebut yang berasal dari persilangan antara induk betina salak Pondoh dan jantan indigenous Sumatera. Penelitian dilakukan pada bulan Januari 2003 sampai dengan Desember 2005 dan bertujuan untuk menyusun database karakter tanaman salak, metode yang digunakan adalah eksplorasi dan pengumpulan database menggunakan model paspor data. Hasil penelitian diperoleh deskripsi 5 aksesi yang warna buahnya putih kekuningan dan 5 aksesi yang warna buahnya putih. Tanaman yang menghasilkan buah dengan mutu baik, yaitu aksesi nomor SNJ-01, di mana daging buahnya tebal (0,57 cm), manis (PTT = 18,00oBrix), masir, berwarna putih kekuningan, dan kadar air (7,02%).
Identifikasi Sifat Fisik dan Kimia Buah-buahan Lokal Kalimantan
Authors: Antarlina Sri S.
Published: February 2017

Eight of Kalimantan’s native fruits were identified at Laboratory of Research Institute of Swampland Agriculture (RISA) in 2003. Characterization conducted for the physical characteristic, chemical composition, and life storage of fruit. Fruit was observedat the optimal maturity. The result of characterization of each fruit in the form of description based on appearance, measurement, taste, and chemical composition. There was reduction in fruit weight and fruit quality during storage at room temperature with life storage of 5 to 11 days. Based on the some fruits such as durian, pampaken, hampalam, kasturi, and kuini, have their commercial value that need to be further developed including their cultivation. Grafted planting material may shorten the juvenile period and reduced the height of plant to ease harvesting. Most of plants are seasonal bearing and their fruits are hard to be peeled. While fruits which have no commercial value, such as mentega, balangkasua, and ramania, are need to be conserved as genetic resources.

 

Abstrak

Delapan jenis buah-buahan lokal Kalimantan telah diidentifikasi di Laboratorium Balai Penelitian Pertanian Lahan Rawa (Balittra) pada tahun 2003. Karakterisasi dilakukan terhadap sifat fisik, komposisi kimia, dan daya tahan simpan buah. Buah diamati pada kondisi masak optimal. Hasil karakterisasi masing- masing buah berupa deskripsi berdasarkan penampakan, ukuran, rasa, dan komposisi kimia. Selama penyimpanan pada suhu kamar, buah mengalami susut bobot dan penurunan kualitas dengan daya tahan simpan 5-11 hari. Berdasarkan karakterisasi ini dapat diketahui buah-buahan seperti durian, pampaken, kuini, kasturi, hampalam potensial untuk dikembangkan, namun perlu dipertimbangkan nilai ekonominya dan perbaikan teknologi budi daya. Bibit sambung mungkin dapat mempercepat tanaman berbuah dan mengurangi tinggi tanaman untuk memudahkan pemetikan buah. Kebanyakan tanaman ini berbuah musiman dan buah sukar dikupas. Buah-buahan yang tidak/kurang memiliki nilai ekonomis (mentega, balangkasua, ramania) perlu dilestarikan secara terencana di kebun plasma nutfah.
Karakterisasi Beberapa Sifat Kualitatif dan Kuantitatif Plasma Nutfah Ubi Kayu (Manihot esculenta Crantz.)
Authors: Zuraida Nani
Published: February 2017

Utilization of cassava plant genetics resources
could be done when the agronomical and morphological
characters are available. Qualitative and quantitative of plant
characters have been studied during April-December 2006 at
Cikeumeuh Experimental Station, Bogor. A total of 225
accessions cassava germplasm were planted in 2 m x 3 m plot
size with 100 cm x 60 cm plant spacing. The plants were
fertilized by 60 kg N, 20 kg P2O5, and 90 kg K2O per ha. One
third N and K fertilizers, and all of P were applied at planting
time, while two third N and K were applied at 3 months after
planting. The result showed that coefficient variation of
qualitative and quantitative characters data of cassava
accessions collected showed high variation. Therefore the
accessions are going to be maintained and conserved for
genetic resources. The plant height, number of tuber, green
matter weight, and harvest index were positive correlation with
tuber weight. While stem diameter and character of leaf lobe
did not correlate with tuber weight. Among qualitative
characters (the colors of young leaf, leaf vein, leaf stalk length,
leaf lobe, stem, tuber, and number of leaf lobe) did not show
difference on tuber weight.
Potensi Jenis Dipterocarpaceae di Hutan Produksi Cagar Biosfer Pulau Siberut, Sumatera Barat
Authors: Subandriono Endro , Bismark M. , Heriyanto N. M.
Published: February 2017

The study of
Dipterocarpaceae was done in November 2007 in Siberut
Biosphere Reserve. This study conducted on threes sample plot
of 0.75 ha in primery forest, logged over area (LOA) <1 year
and LOA 5 years. The result showed there were three species
of Dipterocarpaceae: Dipterocarpus elongatus Korth., Shorea
johorensis Foxw. and Hopea mangarawan Miq. The density of
tree and pole in primary forest were about 24 individual/ha and
13.34 individual/ha, there were 9.3 individual/ha and 4
individual/ha in LOA <1 year, than this density were 8
individual/ha and 5.34 individual/ha in LOA 5 years. For
sapling and seedling, these densities were about 29
individual/ha and 5.417 individual/ha in primary forest, 5
individual/ha and 3.750 individual/ha in LOA <1 year, 89
individual/ha and 883 individual/ha in LOA 5 years.
Community couple between primary forest and LOA wich has
similarity index value more than 50%; at tree stage, it was
68,83% comparing primary forest and LOA <1 year; at pole
stage it was 62.62% comparing primary forest and LOA 5
years; at sapling stage, there were 53.29% and 66,27%
comparing with LOA <1 year and LOA 5 years; at seedling
stage it was 88.66% compared to primary forest and LOA <1
year. Similarity index between LOA <1 year with LOA 5
years, there were 60.26% for tree stage, 90.05% for pole stage
and 51.13% for seedling stage.
Uji Kekerabatan Aksesi Cengkeh di Kebun Percobaan Sukapura
Authors: Tresniawati Cici , Randriani Enny
Published: February 2017

Clove (Syzygium aromaticum L. Merril & Perry) is One of the Oldest Spices in the World. Clove is an evergreen tree with unopened flower bud. It is indigenous to Moluccas Island of Indonesia. Clove are mainly used as an ingredient of a variety of food specialties, beverages, medicines, and cigarettes industry. It is important to have germplasm collection in plant breeding program. Twenty eight accessions have been planted at Sukapura Experimental Garden, Probolinggo, East Java. The objective of this study was to estimate the genetic relationship among 28 clove accessions. The observations were made on fifteen morphological characters and six yield component characters. Eleven morphological characters and one yield component character had wide genetic variability. By applying cluster analysis, a dendogram was constructed to differentiate morphological differences among the accessions. The dendogram showed that the grouping of the accessions at different hierarchical levels, based upon the variation was observed. Results showed that the accession of clove could be classified into four groups. The first group only consisted of Zanzibar 5, the second group consisted of Zanzibar 13 and Siputih 5, the third group only consisted of Zanzibar 8, and 24 accessions belong to the fourth groups.

 

Abstrak

Cengkeh (Syzygium aromaticum L. Merril & Perry) merupakan tanaman rempah tertua di dunia yang berasal dari kepulauan Maluku. Bunga kering cengkeh sering digunakan sebagai bahan untuk bumbu, obat-obatan, kosmetik, dan industri rokok. Koleksi plasma nutfah merupakan hal yang penting dalam suatu program pemuliaan tanaman. Dua puluh delapan aksesi cengkeh ditanam di Kebun Percobaan Sukapura, Probolinggo, Jawa Timur. Penelitian ini bertujuan mengetahui hubungan kekerabatan di antara 28 aksesi cengkeh. Pengamatan dilakukan terhadap 15 karakter morfologi dan 6 karakter komponen hasil. Sebelas karakter morfologi dan satu karakter komponen hasil memiliki keragaman genetik yang luas. Dengan menggunakan analisis kluster ditentukan pengelompokan berdasarkan perbedaan sifat morfologi di antara 28 aksesi tanaman cengkeh. Gerombol I, yaitu Zanzibar 5, Gerombol II terdiri atas Zanzibar 13 dan Siputih 5, Gerombol III, yaitu Zanzibar 8, dan Gerombol IV terdiri atas 24 aksesi lainnya.
Pembentukan Core Collection untuk Sumber Daya Genetik Padi Toleran Kekeringan
Authors: Silitonga Tiur S. , Risliawati Andari
Published: February 2017

The Development of Core Collection for Rice Genetic Resources Tolerant to Drought. The experiment was conducted in dry season, July-September 2009 at the research farm in Jakenan, Central Java and planted in randomized block design (RBD) arrangement by using 150 accessions with the plot size of 5 m x 1 m, with plant spacing 25 cm x 20 cm and three replications. Another experiment used as control and grown as upland rice without drought stresses by watering twice in a week was planted in RBD arrangement with two replications, plot size 5 m x 1 m and spacing 25 cm x 20 cm. The results showed that 26 varieties were selected for sub core collection for drought tolerance. Jatiluhur and B.9645-E-Mr-89 had the highest yield potential respectively 3,88 dan 3,77 t/h. All of the varieties with tolerant to drought were selected for core collection. This would be very important as they could be directly grown by farmers as tolerant varieties or used as sources of gene in the breeding program to improve varieties for drought tolerant with high yielding potential.

 

Abstrak

Pembentukan core collection untuk sumber daya genetik padi toleran kekeringan. Penelitian dilaksanakan pada musim kemarau, Juli-September 2009 di Kebun Penelitian Balai Penelitian Lingkungan Pertanian Jakenan, Jawa Tengah, dengan rancangan acak kelompok, tiga ulangan, menggunakan 150 aksesi yang ditanam pada petak berukuran 5 m x 1 m. Tanaman disiram setiap tiga hari sekali sampai tumbuh baik dan setelah berumur 25 hari tanaman mulai dikeringkan. Sebagai petak pembanding adalah tanaman padi gogo biasa yang disiram setiap dua seminggu sekali sampai panen. Pertanaman pembanding ditanam dengan jarak 25 cm x 20 cm. Dari penelitian ini terpilih 26 varietas toleran kekeringan dengan skor 1-5. Di antara aksesi ini terdapat varietas yang berumur genjah dan sedang (115-135 hari), sehingga waktu panennya agak berbeda. Varietas Jatiluhur dan galur B.9645- E-Mr-89 mempunyai potensi hasil paling tinggi, masingmasing 3,88 dan 3,77 t/ha dan toleran terhadap kekeringan. Aksesi yang toleran terhadap kekeringan terutama yang mempunyai potensi hasil tinggi, dapat langsung digunakan oleh petani atau sebagai sumber gen dalam perakitan varietas unggul toleran kekeringan dan berpotensi hasil tinggi.
Identifikasi, Produksi, dan Potensi Kerandang sebagai Sumber Pangan dan Pakan Alternatif
Authors: Winarti Erna , Sarjiman NFN , Cahyaningrum Nurdiana
Published: February 2017

Identification, Production, dan Potential Kerandang as Alternative Sources of Food and Animal Feed. Kerandang is legume wich grows wildly in the coastal area. Kerandang utilization is expected to increase the economic value useful for local sources of revenue. The aim of this research was to identify and to determine the productivity and nutrient contain in kerandang. This reasearch done through two steps. Firs step was identification of plant species and determination of productivity and its secondary products. The second step was proximate analyzed to leaf, seed, skin seed and pod. The result showed that kerandang plant was family of Fabaceae, Genus of Canavalia, species of Canavalia virosa. Production and nutrient content of seeds and its secondary products varied so that the species has the potential to be developed as a source of protein food and feed, while the leaves, skin seed and pod are potential as are source of ruminant feed.

 

Abstrak

Tanaman kerandang merupakan tanaman kacang-kacangan yang tumbuh liar di lahan pasir. Pemanfaatan tanaman kerandang diharapkan dapat meningkatkan nilai ekonomi yang berguna bagi sumber pendapatan masyarakat setempat. Penelitian ini bertujuan mengidentifikasi tanaman kerandang, mengetahui produksi dan kandungan nutrisi biji serta limbah kerandang. Penelitian dilakukan 2 tahap, tahap I ialah identifikasi tanaman kerandang dan mengukur produksi biji serta hasil samping kerandang. Tahap II ialah analisis kandungan nutrisi pada biji, daun, kulit biji, dan kulit polong. Hasil penelitian menunjukkan bahwa tanaman kerandang termasuk famili Fabaceae, genus Canavalia, spesies Canavalia virosa. Produksi dan kandungan nutrisi biji cukup tinggi serta limbah kerandang cukup bervariasi sehingga berpotensi dikembangkan sebagai sumber protein pangan maupun pakan, sedangkan daun, kulit biji, dan kulit polong berpotensi sebagai sumber pakan ternak ruminansia.

 
Karakter Agronomi dan Ketahanan Beberapa Galur Pelestari Dihaploid terhadap Hawar Daun Bakteri
Authors: Dewi Iswari S. , Rumanti Indrastuti A. , Purwoko Bambang S. , Kadir Triny S.
Published: February 2017

Agronomic Characters and Resistance of Several Dihaploid Maintainer Lines to Bacterial Leaf Blight. Bacterial blight (Xanthomonas oryzae pv. oryzae, Xoo) is one of the most serious diseases of rice in Indonesia. From previous research thirteen lines of dihaploid (DH) maintainer lines-derived anther culture were selected for developing cytoplasmic male sterile lines. In this research those DH maintainers were evaluated for their agronomic characters such as plant height, number of productive tiller, and seed weight per hill as well as their resistance to Bacterial Leaf Blight (BLB) pathotypes III, IV and VIII at Indonesian Center Rice Research (ICRR), Sukamandi during wet season 2008/2009. The results showed that 10 DH maintainer lines i.e. BioMAc18-H36-3-Ma, BioMAc19-H36-3-Mb, BioMAc20- H36-3-Mc, BioMAc21-H36-4-M, BioMAc26-B1-1-Mb, BioMAc29-B2-1-Db, BioMAc31-B2-1-M, BioMAc33-B2-4- Pb, BioMAc34-B4-1-Da and BioMAc35-B4-1-Dc having plant height ranged from 88.79-104.08 cm, productive tiller ranged from 9 to 13 tillers/hill. Among those DH maintainer lines three lines were resistant to BLB pathotype III, i.e. BioMAc26-B1-1-Mb, BioMAc29-B2-1-Db and BioMAc31- B2-1-M lines, and two lines, i.e. BioMAc21-H36-4-M and BioMAc35-B4-1-Dc were highly resistant to BLB pathotype VIII. Only BioMAc35-B4-1-Dc lines highly resistant to BLB pathotype IV.

 

Abstrak

Hawar daun bakteri yang disebabkan oleh bakteri Xanthomonas oryzae pv. oryzae, (Xoo) adalah salah satu penyakit utama padi di Indonesia. Dari penelitian sebelumnya 13 galur pelestari dihaploid (DH pelestari) yang berasal dari kultur antera telah diseleksi untuk perakitan galur mandul jantan baru. Tujuan penelitian ini adalah untuk mengevaluasi karakter agronomi dan ketahanan galur-galur DH pelestari terhadap patogen HDB. Karakter agronomi yang diamati meliputi tinggi tanaman, jumlah anakan produktif, dan bobot hasil per rumpun, sedangkan ketahanan terhadap HDB diamati berdasarkan skor ketahanan terhadap Xoo patotipe III, IV dan VIII di Balai Penelitian Padi, Sukamandi pada musim hujan 2008/2009. Hasil penelitian menunjukkan 10 galur DH pelestari, yaitu galur BioMAc18-H36-3-Ma, BioMAc19-H36-3-Mb, BioMAc20- H36-3-Mc, BioMAc21-H36-4-M, BioMAc26-B1-1-Mb, BioMAc29-B2-1-Db, BioMAc31-B2-1-M, BioMAc33-B2-4- Pb, BioMAc34-B4-1-Da, dan BioMAc35-B4-1-Dc mempunyai tinggi tanaman berkisar antara 88,79-104,08 cm, anakan produktif berkisar antara 9-13 batang/rumpun. Di antara galur DH pelestari yang tahan terhadap HDB patotipe III, yaitu galur BioMAc26-B1-1-Mb, BioMAc29-B2-1-Db dan BioMAc31- B2-1-M, dua galur yaitu galur BioMAc21-H36-4-M dan BioMAc35-B4-1-Dc sangat tahan terhadap HDB patotipe VIII, sedangkan galur BioMAc35-B4-1-Dc yang sangat tahan terhadap HDB patotipe IV.
Seleksi Genotipe Jagung Hibrida Toleran N Rendah
Authors: Syafrudin NFN , Azrai Muhammad , Suwarti NFN
Published: February 2017

Maize Hybrid Genotypes Selection for Low N Tolerance. Syafruddin, Muhammad Azrai, and Suwarti. Most of the maize crop land development in Indonesia are defficient of N, to overcome these obstacles is generally done with N fertilizer. N fertilization beside increasing the cost of production is also causing environmental pollution. Therefore, fertilizer efficiency is required. One effort to reduce N fertilizer usage is the use of low N-tolerant genotypes. Selection of low Ntolerant maize hybrids are expected to found a low N genotypes with high productivity. The experiment was conducted in low land in May-August 2012 in the Bontobili Research Station, Gowa, South Sulawesi. A total of 32 genotypes including check entries were 4 known hybrid Bima- 2, Bima-3, Bima-4, and Bisi-2 were screened in normal rate of N application (200 kg N/ha) and low N (100 kg N/ha). The treatment used experimental randomized complete block design at each fertilization with three replications. To Determine of genotype x N interaction was used combine analysis. The result showed that in selection of tolerance genotypes for low N, beside yield as selection parameter we can also consider leaf chlorophyll, harvest index, number of kernel in ear and seed weight. Genotypes 1044-0 x 1027-11 and AMB07 x CML 161 were tolerance to low N and B11 x 11 is moderat to low N. Three of genotypes have yield equal to 4 check varieties (Bima-2, Bima-3, Bima-4, and Bisi-2).

 

Abstrak

Sebagian besar lahan pengembangan tanaman jagung di Indonesia defisien N. Untuk mengatasi kendala tersebut umumnya dilakukan dengan pemupukan N. Pemupukan N di samping meningkatkan biaya produksi juga menyebabkan pencemaran lingkungan. Salah satu upaya untuk menekan penggunaan pupuk N adalah penggunaan genotipe yang toleran N rendah. Seleksi genotipe jagung hibrida diharapkan memperoleh genotipe toleran N rendah dengan produktivitas tetap tinggi. Penelitian dilaksanakan di lahan sawah pada Mei- Agustus 2012 di KP Bontobili, Gowa, Sulawesi Selatan. Sebanyak 32 genotipe termasuk empat pembanding Bima-2, Bima-3, Bima-4, dan Bisi-2 diuji pada takaran pupuk N normal (200 kg N/ha) dan N rendah (100 kg N/ha). Penelitian menggunakan rancangan kelompok pada masing-masing pemupukan dengan tiga ulangan. Untuk mengetahui interaksi antara genotipe dengan N dilakukan analisis gabungan. Hasil penelitian menunjukkan bahwa untuk mendapatkan genotipe jagung toleran N rendah yang akurat di samping mempertimbangkan hasil biji, juga mempertimbangkan komponen lainnya, seperti klorofil daun, indeks panen, jumlah biji per tongkol, dan bobot biji. Genotipe 1044-9 x 1027-11 dan AMB07 x CML161 toleran N rendah dan B11 x 11 moderat terhadap N rendah, ketiga genotipe tersebut mempunyai hasil biji setara dengan varietas pembanding Bima-2, Bima-3, Bima- 4, dan Bisi-2.
Keragaman Malai Anakan dan Hubungannya dengan Hasil Padi Sawah (Oryza sativa)
Authors: Sutoro NFN , Suhartini Tintin , Setyowati Mamik , Trijatmiko Kurniawan R.
Published: February 2017

Morpho-physiological and yield components of rice are important character that affect the crop yield potential. Seeds as a sink of crops, its yield are very much determined by the panicle yield components, one of which is various type of tillers. The purpose of the research was to study the variability of panicle types andtheir relationshipwith grain yield of rice. Thirty rice varieties/lines were planted and observed in experimental pots. The study revealed that there are differencesin total number of panicle among varieties or lines. Average number of panicle ranges from 20–50 panicle. Among varieties, there were also differences in total number of panicles grown from primary, secondary, tertiary and quarterly tillers. The number of empty seeds of the panicles increases in the order of the sequences of tiller emergence, i.e., main panicle (11%), primary (12%), secondary (12%), tertiary (16%) and quartery (22%). High yielding rice could be obtained through the development of varieties or cultivation techniques that enable the crops produce more panicle in primary and secondary tillers compare to that in tertiary and quarterly tillers. Keywords: rice, panicle, variability.

 

Abstrak

Karakter morfofisiologi dan komponen hasil merupakan karakteristik tanaman yang mempengaruhi produktivitas. Hasil biji sebagai salah satu bagian dari sink tanaman ditentukan oleh komponen hasil, di antaranya malai yang berasal dari berbagai tipe/ jenis anakan padi. Tujuan penelitian ini untuk mengetahui keragaman malai anakan dan hubungannya dengan hasil padi. Percobaan dilaksanakan dengan menanam 30 varietas/galur pada pot percobaan. Hasil analisis menunjukkan perbedaan jumlah total malai di antara varietas/galur yang diuji. Jumlah malai berkisar antara 20–50 buah. Di antara varietas yang diuji juga terdapat perbedaan yang nyata pada jumlah malai yang berasal dari anakan primer, sekunder, tersier, dan kuarter. Kehampaan gabah dari setiap jenis malai cenderung meningkat menurut urutan pemunculan malai anakan padi, dimulai dari malai tanaman induk (11%), primer (12%), sekunder (12%), tersier (16%), dan kuarter (22%). Tanaman padi yang dapat memberi hasil tinggi dapat diperoleh melalui perakitan varietas atau teknik budi daya yang dapat menghasilkan terutama malai anakan primer dan sekunder yang relatif banyak dan sedikit atau tanpa anakan tersier dan kuarter.
Seleksi Galur Mutan Padi Fatmawati Tahan terhadap Penyakit Blas dan Evaluasi Karakter Agronomi di Rumah Kaca dan di Lahan Sawah
Authors: Lestari Endang G. , Dewi Iswari S. , Yunita Rossa
Published: February 2017

Fatmawati, a rice variety released in 2003, is a new plant type (NPT) of rice that had different characteristic from existing high yielding rice varieties (HYV). The yield potential of this rice variety is 7.5 t/ha. Therefore its cultivated is expected to increase national rice production. However, the dissemination of this variety was hampered in several regions due to its susceptibility to blast disease and high percentage of empty grain caused by partially exserted and enclosed panicle. This research was conducted to evaluate 104 dihaploid mutant lines of Fatmawati for resistance to blast disease and good agronomic characters, especially for panicle exsertion rate. The first research was conducted in the endemic area of blast disease at Cikembar-Sukabumi, West Java. The blast disease resistance lines were then subsequently evaluated for their agronomic characters by planting in the green house and in the field. The results indicated that 40 dihaploid mutant lines were characterized as resistant and moderately resistant to blast (score 3–5). Agronomic characters evaluation in the green house and in the field resulted in 11 dihaploid mutant lines with well exerted panicle (0% of coverage of panicle by flagleaf sheath) and high grains per panicle (229–283 grains/panicle). Those lines were F99, F102, F116, F122, F130, F134, F138, F147, F149, F150, and F153.

 

Abstrak

Fatmawati, varietas padi yang dilepas tahun 2003, adalah padi tipe baru (PTB) yang mempunyai karakteristik berbeda dari varietas padi unggul baru (VUB). Potensi hasil varietas padi ini adalah 7,5 t/ha. Penanaman varietas ini diharapkan akan meningkatkan produksi padi nasional. Namun, diseminasi varietas ini di beberapa tempat mengalami hambatan karena kerentanannya terhadap penyakit blas dan tingginya persentase gabah hampa akibat setengah tertutupnya atau tertutup semuanya malai oleh pelepah daun bendera. Penelitian ini dilakukan untuk mengevaluasi 104 galur mutan dihaploid turunan Fatmawati terhadap ketahanan blas dan karakter agronomi, khususnya laju keluarnya malai. Penelitian pertama dilakukan di daerah endemik penyakit blas di Cikembar- Sukabumi, Jawa Barat. Galur-galur yang tahan blas kemudian dievaluasi karakter agronominya dengan menanam di rumah kaca dan lapang. Hasil penelitian menunjukkan terdapat 40 galur mutan dihaploid dikategorikan sebagai tahan dan agak tahan penyakit blas (skor 3–5). Evaluasi karakter agronomi di rumah kaca dan lapang menghasilkan 11 galur mutan dihaploid yang malainya sempurna keluar (0% penutupan malai oleh pelepah daun bendera) dan jumlah gabah/malai tinggi (229–283 gabah/malai). Galur mutan dihaploid tersebut adalah galur F99, F102, F116, F122, F130, F134, F138, F147, F149, F150, dan F153.
SEBARAN DAN POTENSI GONYSTYLUS NON BANCANUS DI SUMATERA DAN KALIMANTAN
Authors: Wardani Marfuah , Komara Tajudin Edy , Heriyanto N. M.
Published: February 2017

Kelompok jenis Gonystylus non bancanus termasuk dalam kelompok kayu komersial ramin, yang saat ini telah banyak dieksploitasi, sehingga diperlukan adanya upaya budidaya dan konservasi. Dalam rangka menunjang upaya tersebut, telah dilakukan penelitian yang bertujuan untuk mengetahui sebaran dan potensi Gonystylus non bancanus di empat lokasi (Sumatera Barat, Bengkulu, Kalimantan Tengah dan Kalimantan Barat) pada bulan Mei sampai bulan Nopember 2015. Pengumpulan data menggunakan plot bujur sangkar ukuran 20m x 20m, jumlah satuan contoh yang dibuat pada setiap lokasi 10 plot. Hasil penelitian menunjukkan bahwa Gonystylus non bancanus dijumpai pada ketinggian tempat antara 220 – 700 m dpl, dipinggir bukit dengan topografi agak curam dan menyebar secara berkelompok. Komposisi vegetasi di sekitar pohon Gonystylus non bancanus banyak dijumpai jenis-jenis Shorea bracteolata Dyer dengan INP sebesar 124,21%, Dipterocarpus kunstleri King. dengan INP 112,76% dan Shorea laevis Ridl. dengan INP  98,25%. Lingkungan fisik yang berkaitan erat dengan jenis tersebut adalah suhu antara 22–36 °C, kelembaban udara antara 83 – 95%,  kemiringan lahan  antara  21 - >50% dan pH tanah antara 5,3 – 6,4. Jenis Shorea bracteolata Dyer berasosiasi dengan Gonystylus non bancanus paling kuat (indeks Ochiai 0,61), Syzygium occlusum Miq.(indeks Ochiai 0,58) dan Shorea lamellata Foxw. (indeks Ochiai 0,48). Regenerasi alami Gonystylus non bancanus di lokasi penelitian masih normal artinya jumlah semai lebih besar dari pancang dan jumlah pancang lebih besar dari pohon, namun secara umum keberadaan jenis ini sangat terpencar hanya di hutan tertentu.