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Seed and fertilizer are two important farming inputs, which are commonly available and used separately. Combining both materials into a unit of fertilizer-coated seed may improve farming efficiency. However, the appropriate seed coating method must be found out, and this research was the first effort of finding the method. A glasshouse experiment was carried out to identify the growth and yield of the coated seeds of rice and groundnut with organomineral fertilizer in three different sizes, i.e., small (SS), medium (MS), and big sizes (BS). Four sets of experiments were prepared, two of those were for testing two varieties of rice and the others were for testing two varieties of groundnut. Each experiment was laid out in a complete randomized design; the treatment was the size of coated seeds (SS, MS, BS, and a control - uncoated seeds) in triplicates. Results reveal that the seed coating delayed the germination of rice seeds for 2 – 3 days and groundnut seeds for 7 – 16 days, suppressed the growth and yield of rice but improved the growth and yield of groundnut. The highest yield of groundnut was the grown groundnut from the small and medium sizes of coated seeds (weight ratios of 1:4 and 1:9). The reduces of growth and yield of rice were most probably due to the direct contact of the high concentration of nutrients, especially nitrogen, with the seeds. In conclusion, the seed coating with organomineral fertilizer was a potentially developed method to improve farming efficiency. Further efforts were needed to fix the composition of organomineral fertilizer, especially the type N substances used and the steps of applying the materials onto the seeds.

Seed coating with silicate rock-basis organomineral fertilizer (OMF) was proposed as an appropriate method to improve the productivity and profitability of rice farming. This research aimed to evaluate the growth and yield components of rice grown from coated seeds with N-enriched OMF. The coated seeds of two rice varieties, i.e., Trisakti (T) and Nutri Zinc (NZ) were tested in separate experimental sets. A randomized block design was applied for each experiment with the treatment consisting of non-coated seed (NCS), coated seeds containing 4.5% N (CS-1), 7.8% N (CS-2), and 9.0% N (CS-3) in 3 blocks. The coating material of OMF was a mixture of 90% basaltic rock and 10% rock phosphate, enriched with N accordingly to the treatment; and the weight ratio of seed to OMF was about 1:16. The coated seeds were planted directly to the ground (without sowing and transplanting steps), and only NCS was fertilized with NPK (15:15:15) equivalent to 300 kg. ha-1. Results reveal that there was no significant difference in growth components (number of tillers and the weight of top-biomass) and quality of rice grains (weight of 1,000 grains) for the plants of coated and non-coated seeds. Enriching OMF with N up to 9% consistently improved the total yield of rice. Therefore, seed coating with OMF containing about 9% N was an appropriate method to optimize rice yield.

ABSTRAKTujuan penelitian adalah untuk mengetahui keseragaman dalam genotipe galur harapan padi beras hitam hasil seleksi bulk.Percobaan dilaksanakan pada lahan sawah di desa Nyurlembang Kecamatanan Narmada kabupaten Lombok Barat. Waktu kegiatan MK April-Agustus 2017. Rancangan percobaan yang di gunakan adalah Rancangan Acak Kelompok 10 perlakuan ( 7 galur harapan F9 padi beras hitam hasil seleksi bulk, 2 tetua yaitu varietas Situ Patenggang dan padi Baas Selem, serta varietas IR20 sebagai varietas pembanding peka) yang diulang 3 kali.Penanaman dilakukan pada luasan lahan 3 x 4 m pada tiap perlakuan, jarak tanam 25 x 25 dengan sistem gogo, pemupukan dilakukan pada umur 7 hst dengan menggunakan Phonska dosis 300 kg/ha, pupuk Urea diberikan pada umur 30 hst dan 50 hst dengan dosis masing-masing 100 kg/ha. Pengairan diberikan bila tanaman pembanding (IR20) menunjukkan daun menggulung.Data pengamatan meliputi umur panen, tinggi tanaman,jumlah anakan produktif per rumpun, jumlah anakan non produktif per rumpun, panjang malai, jumlah gabah berisi, jumlah gabah hampa, bobot 100 butir gabah, dan bobot gabah per rumpun. Analisis keragaman dalam genotipeberdasarkan Lysbeth,2008. Hasil Penelitian menunjukkan: Umur panen, jumlah anakan non produktif, dan panjang malai dari semua galur menunjukkan keseragaman dalam populasi dalam setiap galur kecuali galur G7/III (F9 3/4/1) pada jumlah anakan non produktif, galur G5/II (F9 3/2/1) dan G7/II (F9 3/4/1) pada panjang malai.

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