Impact of the Timing of First Irrigation and Subsequent Irrigation Schedules on Direct-Seeded Furrow-Irrigated Basmati Rice: Crop Growth, Productivity, Water Balance and Profitability

IF 1.7 4区农林科学 Q2 AGRONOMY

Irrigation and Drainage Pub Date : 2025-01-08 DOI:10.1002/ird.3070

Diljeet Kaur, Angrej Singh, Vinay Kumar Sindhu, Kanwar Barjinder Singh

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Abstract

Addressing food security and water scarcity calls for the cultivation of rice with improved productivity while minimizing water use. To assess the impact of planting techniques and irrigation schedules on the grain yield and water productivity of direct-seeded basmati rice (DSBR), a 2-year field experiment was conducted. This study tested whether (1) broad beds (90:30 cm) would increase water productivity and yield compared with conventional beds (37.5:30 cm) and (2) delaying the first irrigation and optimizing schedules would improve water efficiency without reducing yield. A split-plot design was used with planting techniques (conventional and broad beds) and the timing of the first irrigation (7 and 14 DAS) in the main plots, whereas subsequent irrigation schedules (IW/ET_c values of 1.50, 1.75 and 2.0) were tested in the subplots. The results revealed that increasing the bed width did not significantly impact yield. Delaying the first irrigation saved 59 mm (5%) of water and reduced deep drainage by 107 mm (9%) without affecting yield or actual ET. Subsequent irrigation scheduling at IW/ET_c ratios of 1.75 and 2.0 increased the grain yield by 10%–15% compared with 1.50 IW/ET_c. Nonetheless, an IW/ET_c of 1.75 saved approximately 17% of the irrigation water compared with an IW/ET_c of 2.0, reducing the cultivation cost by US$ 30.2–43.8 ha⁻¹ while maintaining a similar grain yield.

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第一次灌溉时间和后续灌溉计划对直播沟灌巴斯马蒂稻的影响：作物生长、生产力、水分平衡和盈利能力

要解决粮食安全和水资源短缺问题，就必须在提高水稻产量的同时尽量减少用水。为了评估不同种植技术和灌溉时间对直播巴斯马蒂稻（DSBR）籽粒产量和水分生产力的影响，进行了为期2年的田间试验。本研究验证了(1)宽床（90:30 cm）与常规床（37.5:30 cm）相比，是否能提高水分生产力和产量；(2)推迟第一次灌溉和优化灌溉计划是否能在不降低产量的情况下提高水分利用效率。采用分块设计，采用种植技术（常规和宽床），在主要地块进行第一次灌溉（7和14 DAS），而在次要地块进行后续灌溉（IW/ETc值分别为1.50、1.75和2.0）。结果表明，增加床层宽度对收率影响不显著。延迟第一次灌溉节水59 mm(5%)，深层排水减少107 mm(9%)，而不影响产量或实际蒸转量。后续灌溉时，IW/ETc比值为1.75和2.0，与1.50 IW/ETc相比，增产10%-15%。尽管如此，与IW/ETc为2.0相比，IW/ETc为1.75可节省约17%的灌溉用水，在保持类似粮食产量的同时，可将种植成本降低30.2-43.8公顷- 1美元。

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来源期刊

Irrigation and Drainage 农林科学-农艺学

CiteScore

3.40

自引率

10.50%

发文量

107

审稿时长

3 months

期刊介绍： Human intervention in the control of water for sustainable agricultural development involves the application of technology and management approaches to: (i) provide the appropriate quantities of water when it is needed by the crops, (ii) prevent salinisation and water-logging of the root zone, (iii) protect land from flooding, and (iv) maximise the beneficial use of water by appropriate allocation, conservation and reuse. All this has to be achieved within a framework of economic, social and environmental constraints. The Journal, therefore, covers a wide range of subjects, advancement in which, through high quality papers in the Journal, will make a significant contribution to the enormous task of satisfying the needs of the world’s ever-increasing population. The Journal also publishes book reviews.