Judul: Pengaruh proses pembuatan media terhadap semai duabanga moluccana BL.
Abstrak: Penelitian ini bertujuan untuk mengetahui pengaruh pembocoran kantong media pengomposan selama masa inkubasi terhadap pertumbuhan semai D. moluccana Bl. IPB Penelitian dilaksanakan di Laboratorium Silvikultur dan Rumah Kaca Fakultas Kehutanan IPB pada bulan April sampai dengan Agustus 1997. Rancangan penelitian yang dilakukan adalah rancangan faktorial 4 x 5 dalam pola acak lengkap yaitu komposisi media (faktor A) dan waktu pembocoran kantong media (faktor B), dengan 3 kali ulangan. Analisis data dilakukan secara statistik dan uji lanjutan menggunakan Uji Jarak Duncan dan Uji Dunnet dengan kontrol berupa media tanah Latosol. Interaksi antara faktor komposisi media dengan waktu pembocoran kantong media mempunyai pengaruh yang sangat nyata terhadap pertambahan tinggi semai. Media campuran dedak dan serbuk gergaji 1: 2 dengan pembocoran kantong media pada hari ke-10 (A2B2) memberikan rata-rata pertambahan tinggi semai sebesar 7.53 cm atau lebih besar 60.2%. Hasil sidik ragam terhadap pertambahan diameter semai menunjukkan bahwa faktor komposisi media (A), faktor waktu pembocoran kantong media (B) dan interaksi antara kedua faktor tersebut memberikan pengaruh yang sangat nyata. Media dengan komposisi dedak dan serbuk gergaji 1:2 (A2) memberikan diameter rata-rata tertinggi sebesar 1.39 mm. Perlakuan pembocoran kantong media pada hari ke-10 (B3) memberikan pertambahan diameter rata-rata sebesar 1.42 mm. Sedangkan media dedak tanpa perlakuan pembocoran kantong media (A0B0) memberikan pertambahan diameter rata- rata tertinggi sebesar 1.93 mm atau lebih besar 80.4% dari kontrol. Berdasarkan hasil sidik ragam, interaksi antara faktor komposisi media dengan waktu pembocoran kantong media pada masa inkubasi memberikan pengaruh yang sangat nyata terhadap berat kering total semai. Hasil Uji Jarak Duncan menunjukkan bahwa perlakuan...
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Judul: Pengaruh pemberian ZPT (Rootone-F) terhadap pertumbuhan stek Duabanga moluccana, Blume.
Abstrak: INTRODUCTION Insufficient supply of raw materials to support wood based industries in Indonesia cause of the changes on orientation for wood supply from natural forest to plantation forest in developing fast growing tree species. Duabanga mollucana Blume, is an Indonesian native fast growing tree species that have good characteristic as raw materials for wood based industries. Vegetative propagation can be done to this species besides their ability to be propagated from seed. Shoot and stem cuttings are alternative ways to obtain qualified seedlings in appropriate amounts and timely manner. Plant growth regulator treatment was expected to increase cutting's survival rate and rooting percentage. Objective of this research was to determine the effect of plant growth regulator on the growth of shoot and stem cutting of Duabanga moluccana. This research would be useful to provide information for the production for high quality seedlings. MATERIAL AND METHOD This research was carried out on green house with KOFFCO system (Komatsu-Forda Fog Cooling System) at Balai Penelitian dan Pengembangan Hutan dan Konservasi Alam, Gunung Batu, Bogor, West Java. from August to october 2010. Materials used in this research were shoot and stem of Duabanga seedlings from selected mother trees (M07) from SEAMEO BIOTROP, Rootone-F, Dithane M-45, rice husk, cocopeat, and zeolite. The experimental design in this research was completely randomized design with 2 factors and 3 replicates. The first factor was source of cutting material (shoot and stem) and the second factor was concentration of plant growth regulator (0 ppm, 500 ppm, 1000 ppm, and 1500 ppm). Growth parameters observed were (1) survival rate, (2) rooting percentage, (3) number of roots, (4) root length, (5) root fresh weight and dry weight (6) shoot fresh weight and dry weight (7) shoot-root ratio. Data was processed with analysis of variance then followed by fisher's LSD test. RESULT AND CONCLUSION Analysis of variance was conducted to explore the impact of all factors on growth parameters, shoot cutting was found to be the most significantly different related to each growth parameters observed; those were (1) survival rate, (2) rooting percentage, (3) number of roots, (4) root length, (5) root fresh weight and dry weight (6) shoot fresh weight and dry weight (7) shoot-root ratio , beside that, stem cuttings was not significantly different related to those growth parameters observed. Rooting percentage on shoot cuttings was 82% and stem cuttings was 0%. Plant growth regulator treatments were not significantly affected cuttings, because control (0 ppm) on shoot cuttings showed high rooting percentage value (77%), followed by 500 ppm (80%), 1500 ppm (83%), and 1000 ppm (87%). Interaction between source of materials and concentration of plant growth regulators was also not significantly related on each growth parameters observed because all of stem cutting could not survive during root primordial initiation, shoot cuttings was also not significantly different related to those growth parameters observed, because control (0 ppm) on shoot cuttings produced significant survival rate (77 %).
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Judul: Cycle Hamilton pada Graf Lengkap, Graf Regular, dan Graf 2-Connected 4-Regular Berorder Kurang dari Sepuluh
Abstrak: Suatu graf disebut graf Hamilton apabila graf tersebut memuat cycle Hamilton, yaitu cycle yang melewati setiap vertex tepat satu kali. Menentukan keberadaan cycle Hamilton pada suatu graf dapat menggunakan syarat cukup yang berupa teorema-teorema yang telah diperkenalkan sejak tahun 1950-an. Beberapa syarat cukup yang dibahas dalam karya ilmiah ini adalah syarat cukup yang berhubungan dengan graf lengkap dan graf regular. Suatu graf lengkap berorder 𝑛������ ≥ 3 dan graf r-regular berorder 𝑛������ ≤ 2𝑟������ + 1 merupakan graf Hamilton, Karena kedua graf tersebut memuat cycle Hamilton. Selanjutnya, syarat cukup tersebut digunakan untuk menentukan keberadaan cycle Hamilton pada graf 2-connected 4- regular berorder kurang dari 10.
Keyword: graf Hamilton, graf regular, graf lengkap, graf 2-connected 4-regular