The water use, yield and profitability in three cropping sequences (rice–capsicum–baby corn, rice–rice–baby corn and rice–rice) grown under a drip irrigation (DRI) layout were compared with that in a rice–rice system under surface irrigation (SI) in a rice-dominated region of eastern India. The DRI could save 37% of irrigation water without affecting the yield in rice compared with SI. The DRI in the rice–capsicum–baby corn cropping system produced 4.63 times higher yield (rice equivalent yield, 48.2 t ha‾¹) using 59% less water (7570 m³ ha‾¹), resulting in 11 times higher water productivity (8.72 kg rice m‾³ water), 7.63 times higher annual net income (NI) (435 000 INR ha‾¹) and 18 times higher economic water productivity (EWP) (INR 78.7 m‾³ water) with a benefit–cost ratio (BCR) of 2.87 compared with the rice–rice cropping system under SI. Use of DRI in a multi-cropping sequence is recommended for higher water productivity and net profit in rice-based cropping systems in irrigated commands.

中文翻译：

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在水稻种植系统中全年使用滴灌的技术经济可行性*

比较了滴灌（DRI）布局下三种种植顺序（水稻-辣椒-玉米、水稻-水稻-玉米和水稻-水稻）与水稻-水稻系统在滴灌（DRI）布局下的用水量、产量和盈利能力。印度东部以水稻为主的地区的地表灌溉（SI）。与SI相比，DRI可以在不影响水稻产量的情况下节省37%的灌溉用水。水稻-辣椒-玉米玉米种植系统中的 DRI 产量提高了 4.63 倍（水稻当量产量，48.2 t ha‾¹），用水量减少了 59%（7570 m · ³ ha‾¹），水生产率提高了 11 倍（ 8.72 kg 大米 m‾ ³水），年净收入 (NI) 提高 7.63 倍（435 000 INR ha‾¹），经济用水生产力 (EWP) 提高 18 倍（INR 78.7 m‾ ³水）与 SI 下的稻米种植系统相比，效益成本比（BCR）为 2.87。建议在多作序列中使用 DRI，以提高灌溉区水稻种植系统的水生产率和净利润。