Judul: Morpho-physiology Characters of Rice (Oryza sativa) Genotypes in Direct Seediing of Rice System
Abstrak: Sistem budidaya tanam benih langsung (Tabela) telah banyak dipraktikkan di berbagai negara Asia karena dianggap lebih hemat air dan tenaga kerja serta memberikan keuntungan yang lebih baik dibandingkan sistem pindah tanam. Namun demikian, perbaikan pengelolaan praktik sistem budidaya ini masih diperlukan khususnya dalam pola tanam dan penggunaan varietas yang sesuai. Penelitian ini bertujuan untuk mengkaji karakter fisiologi, komponen hasil dan hasil genotipe padi pada sistem budidaya pindah tanam dan Tabela. Penelitian ini dilaksanakan di lahan dengan sistem budidaya pindah tanam dan Tabela (sebar alur dan sebar permukaan) serta menggunakan 4 galur unggulan dan satu varietas nasional. Sebanyak 25 kombinasi perlakuan dirancang dengan rancangan split-plot kelompok acak lengkap (Split plot RAKL) dengan 3 ulangan setiap perlakuan. Hasil penelitian menunjukkan bahwa padi yang ditanam dengan Tabela laju fotosintesis yang sama dengan tanaman padi pada budidaya pindah tanam, namun menghasilkan panjang malai, jumlah gabah per malai, dan jumlah gabah isi yang lebih rendah serta waktu berbunga lebih cepat. Genotipe IPB193-F-17-2-3 menghasilkan produktivitas tertinggi pada budidaya tanam benih langsung lahan basah (metode alur dan sebar) dan lahan kering (metode alur). Genotipe IPB193-F- 38-2-1 menghasilkan produktivitas tertinggi pada sistem pindah tanam dan tanam benih langsung lahan kering (metode sebar). Produktivitas varietas Ciherang pada sistem tanam benih langsung (metode alur) tidak berbeda dengan sistem pindah tanam. Temuan ini mengindikasikan bahwa sistem tanam benih langsung dengan metode alur cukup menjanjikan untuk dikembangkan lebih lanjut., The direct seeding of rice (DSR) system has been widely practiced in various Asian countries because it is considered more efficient in water and labor and provides better benefits than transplanting systems. However, improvements in the management of this system practice are still needed, especially in cropping patterns and the use of appropriate varieties. This study examines the physiological characteristics, yield components, and yields of rice genotypes in transplanting and DSR systems. This research was carried out in the field with transplanting and DSR cultivation systems (drill and broadcast sowing) and used four superior lines and one national variety. A total of 25 treatment combinations were designed using a split-plot randomized complete block design (Split plot-RCBD) with three replications for each treatment. The results showed that rice grown with DSR had no different level of greenery and photosynthesis rate than rice in transplanting cultivation, but produced lower panicle length, the number of grains per panicle, the number of filled grains, and faster flowering time. Genotype IPB193-F-17-2-3 produced the highest productivity in wet DSR (drill and broadcast sowing) and dry DSR (drill sowing). Genotype IPB193-F-38-2-1 had the highest productivity in transplanting techniques and dry DSR (broadcast method). The productivity of the Ciherang variety in the DSR system (drill method) was not different from the transplanting system. This finding indicates that the direct seeding system using the drill method is promising for further development.
Keyword: cultivation system, early vigor, embryo, endosperm, seed traits

Judul: Multicanopy Cultivation of Four Rice Varieties with Jajar Legowo Planting Distances at KP Babakan Dramaga
Abstrak: Padi (Oryza sativa) merupakan salah satu tanaman pangan terpenting di Indonesia. Peningkatan konsumsi beras tidak sebanding dengan luas panen di Indonesia. Penelitian ini bertujuan mempelajari pengaruh sistem budidaya dan varietas terhadap peningkatan produksi padi di Kebun Percobaan Sawah Baru IPB, Babakan Dramaga. Penelitian ini menggunakan RKLT faktorial dengan dua faktor yaitu sistem budidaya (monokultur, multikanopi sisip 1, multikanopi sisip 2) dan varietas (INPARI 32, INPARI 33, INPARI 43, IPB 9G sebagai tanaman sisipan). Hasil penelitian menunjukkan bahwa terdapat interaksi kedua perlakuan yang berpengaruh pada tinggi tanaman saat berumur 8 MST, tinggi batang saat panen, sudut kemiringan daun bendera. Pengaruh tunggal sistem budidaya signifikan terhadap tinggi tanaman padi saat berumur 8 MST, jumlah anakan, panjang daun dan sudut kemiringan daun bendera, bobot kering tajuk dan bobot kering malai saat panen, jumlah malai per rumpun, jumlah gabah isi per malai, bobot gabah per rumpun. Pengaruh tunggal varietas signifikan terhadap tinggi tanaman, jumlah anakan, panjang daun dan sudut kemiringan daun bendera, bobot kering malai, panjang malai, jumlah gabah per malai, jumlah gabah isi per malai, bobot 1000 butir, dan bobot gabah per rumpun., Rice (Oryza sativa) is one of the most important food crops in Indonesia. The increase in rice consumption is not proportional to the harvested area in Indonesia. This study aims to study the effect of cultivation systems and varieties on increasing rice production in the Experimental Garden of Sawah Baru IPB, Babakan Dramaga. This study used a factorial RKLT with two factors, namely the cultivation system (monoculture, multi-canopy insertion 1, multi-canopy insertion 2) and varieties (INPARI 32, INPARI 33, INPARI 43, IPB 9G as insertion plant). The results showed that there was an interaction between the two treatments that affected plant height at 8 WAP, stem height at harvest, flag leaf tilt angle. The single effect of the cultivation system was significant on rice plant height at the age of 8 WAP, number of tillers, leaf length and angle of inclination of flag leaves, crown dry weight and panicle dry weight at harvest, number of panicles per clump, number of filled grain per panicle, grain weight per clump. The single varietal effect was significant on plant height, number of tillers, leaf length and angle of inclination of flag leaf, panicle dry weight, panicle length, number of grain per panicle, number of filled grain per panicle, 1000 grain weight, and grain weight per clump.
Keyword: insertion, interaction, monoculture, production, productivity

Judul: Konstruksi Hukum Grup Kurva Eliptik Atas F3m
Abstrak: Elliptic curves upon F3m can be divided in two cases, i.e. supersingular and nonsupersingular case. Based on group laws on elliptic curves, a new arithmetic upon F3m can be formulated as an addition process of two random points on the curve. This addition process can then be applied to the ElGamal algorithm.
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