Sheet pipe technology is a drainage and irrigation underground system. This study aimed to understand the effect of sheet pipe technology on growth, yield and prospect to increase planting index (PI) on irrigated rice field. The research conducted in Sukamandi Experimental Station, West Java on 2019 to 2020. It used nested design with five replications. First was water management as nested factor, i.e.: Sheet pipe and (2) no sheet pipe. Second was cropping system, i.e.: (1) paddy–paddy, (2) paddy–paddy–soybean, (3) paddy–paddy–paddy, using Inpari 43 GSR Agritan. The result shown that (1) The effect of sheet pipe was strongly influenced by the season, especially in the dry season. (2) Sheet pipe supported better tiller ability, leaf area index, biomass, plant height, root volume, number of panicle per hill, number of grains per panicle and yield. (3) Increasing PI from two to three using sheet pipe technology could increase the total yield by 11.54% (paddy-paddy-soybean) and 26.94% (paddy-paddy-paddy) compared with no sheet pipe. Meanwhile, the paddy-paddy also provided total yield of 10.86% compared with no sheet pipe, and (4) Sheet pipe increased soil pH, bacterial aerobic, rhizobium and nitrogen fixing bacteria, and soil respiration.

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This study aims to determine the performance of drip irrigation technology as compared to conventional farmer’s practice on rice growth and yield, grain quality, and water consumption. The research was carried out at the Sukamandi Experimental Station, Subang, West Java in July - October 2019. The test was arranged by a nested randomized block design with 5 replications. The main plot was water management with 2 levels: (1) Drip Irrigation Technology (DIT) and (2) Conventional Farmer’s Practice (CFP) (flooded condition) as a comparation. Subplot was varieties with 4 levels: two hybrid rice (1) Hipa 8 and (2) Hipa 18, upland rice (3) Inpago 11, and irrigated inbred rice (4) Inpari 42. The result showed that yield of DIT not significantly different to CFP with higher number of tillers per m2. However, it was lower for plant height, tillering ability, grain filling, 1000 grains weight, transpiration rate, assimilation rate and stomatal conductance. For grain quality determination, DIT gave an increase in the average of grain density and impurities, but decreased in the average percentage of chalky and immature grains. In Hipa 18, DIT was able to produce a higher percentage of head rice. DIT only consumed 3864 m3/ha/season water irrigation compared with average water consumption in Sukamandi Field Station which range of 7460-8740 m3/ha/season.Keywords: Drip irrigation, Rice, Water, Yield, Grain quality

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Optimalisasi penggunaan lahan rawa pasang surut untuk meningkatkan produktivitas dan hasil padi dapat dilakukan dengan peningkatan indeks pertanaman (IP). Penelitian ini dilakukan untuk mendapatkan informasi peluang peningkatan indeks pertanaman melalui penggunaan varietas unggul baru padi. Penelitian dilaksanakan pada Januari-Desember 2019 di Desa Sukaraja, Kabupaten Banyuasin, Sumatera Selatan dengan menguji tiga kombinasi pola tanam yang diulang empat kali. Perlakuan pola tanam yaitu: P1: Regas (musim tanam /MT 1)-Regas (MT 2); P2: Inpara 2 (MT 1)-Inpara 2 (MT 2); P3: Inpara 2 (MT 1)-Inpari 19 (MT 2)-Inpari 19 (MT 3). Regas adalah varietas lokal yang umum ditanam petani, Inpara 2 adalah varietas unggul baru (VUB) adaptif lahan rawa, dan Inpari 19 adalah VUB berumur genjah. Budidaya yang diterapkan yaitu Rawa Pasang Surut Intensif, Super, dan Aktual (RAISA). Pengamatan dilakukan terhadap karakter pertumbuhan dan hasil, serta perbandingan hasil antar pola tanam. Pola tanam padi-padi dengan VUB adaptif rawa (Inpara 2) merupakan pola tanam dengan hasil tertinggi sebesar 11.35 ton ha-1 GKG atau 34.6% lebih tinggi dibanding padi lokal. Indeks pertanaman di lahan rawa pasang surut berpeluang ditingkatkan menjadi tiga kali tanam pada kondisi curah hujan tahunan tinggi dengan didukung pendekatan varietas hasil tinggi dan umur pendek. Kata kunci: budidaya lahan rawa, optimalisasi lahan, padi rawa, pola tanam, RAISA