Abstract The scarcity of water for agriculture in arid and semi-arid regions increases the need for technologies to improve water use efficiency and also discover some means to increase the production from less and more reliable access to water. This research was conducted during 2017–18 and 2018–19 to assess the effect of deficit irrigation (DI), applied at appropriate critical growth stages of winter wheat (Triticum aestivum L.) by reducing 50 % of the water applied in control. The treatments were scheduled as, T1 = 100 % irrigation at all six growth stages (Ick 100), T2 = 50 % deficit irrigation at the initiation stage of the crown root (ICRS50), T3 50 % deficit irrigation at tillering stage (ITS 50), T4 = 50 % deficit irrigation at booting stage (IBS50), T5 = 50 % deficit irrigation at the heading stage (IHS 50), T6 = 50 % deficit irrigation at milky stage (IMS50), T7 = 50 % deficit irrigation at grain maturity stage (IGMS50). The highest grain yield (4558.8 kg ha−1) was achieved with full irrigation treatment Ick100. The statistical analysis conferred a significant change (p

中文翻译：

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亏缺灌溉策略对信德省半干旱气候下冬小麦的影响

摘要 干旱和半干旱地区农业用水的稀缺增加了对提高用水效率的技术的需求，并且还发现了一些方法来通过更少和更可靠的供水来增加产量。本研究于 2017-18 年和 2018-19 年期间进行，旨在评估亏缺灌溉 (DI) 的效果，该灌溉在冬小麦 (Triticum aestivum L.) 的适当关键生长阶段通过减少 50% 的控制用水量来应用。处理计划为，T1 = 在所有六个生长阶段 (Ick 100) 进行 100% 灌溉，T2 = 在冠根起始阶段 (ICRS50) 进行 50% 亏缺灌溉，T3 在分蘖阶段 (ITS 50) 进行 50% 亏缺灌溉)，T4 = 孕穗期 50% 亏缺灌溉 (IBS50)，T5 = 抽穗期 50% 亏缺灌溉 (IHS 50)，T6 = 乳汁期 50% 亏缺灌溉 (IMS50)，T7 = 谷物成熟期 (IGMS50) 50% 亏缺灌溉。全灌溉处理 Ick100 实现了最高的谷物产量（4558.8 kg ha-1）。统计分析赋予显着变化 (p