Crop Water Stress Index and Yield Relationships for Winter Wheat (Triticum aestivum) Crops Grown Under Different Drip and Flood Irrigated Treatments

IF 3.7 2区 农林科学 Q1 AGRONOMY
Aditi Yadav, Hitesh Upreti, Gopal Das Singhal
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Abstract

The Crop Water Stress Index (CWSI) is a widely used method for quantifying crop water status and predicting yield. However, its evaluation across different irrigation methods and its stage-specific response to crop yield is rarely evaluated. In this study, controlled field experiments were conducted on winter wheat using drip irrigation (DI) and flood irrigation (FI) during the 2021–2022 and 2022–2023 seasons in western Uttar Pradesh, India. The irrigation treatments included 50% MAD (maximum allowable depletion) (DI), 55% MAD (DI), 60% MAD (DI), 50% MAD (FI), local farmer's field replication (FI), rain-fed, and well-watered treatment (DI). The derived mean CWSI values for the irrigation treatments ranged from 0.03 to 0.66 in season 1 and 0.06 to 0.57 in season 2 across treatments. The seasonal mean CWSI for 50% MAD (DI) was 0.12 (season 1) and 0.11 (season 2), while 50% MAD (FI) yielded higher mean CWSI values of 0.29 (season 1) and 0.22 (season 2). The 50% MAD (DI) treatment produced the highest grain yield and water use efficiency in both seasons. A comprehensive analysis of stage-specific CWSI values and grain yields revealed that grain yield was more sensitive to post-heading CWSI as compared to pre-heading CWSI values. Among the growth stages, CWSI values during the flowering stage were the most critical for predicting wheat yield. The study recommends that the CWSI values in the flowering and post-heading stages are more relevant in predicting wheat yield accurately as compared to the pre-heading and seasonal mean CWSI.

不同滴灌和漫灌条件下冬小麦(Triticum aestivum)作物水分胁迫指数与产量的关系
作物水分胁迫指数(CWSI)是一种广泛使用的量化作物水分状况和预测产量的方法。然而,很少有人对其在不同灌溉方法下的评估及其对作物产量的特定阶段响应进行评估。本研究在 2021-2022 年和 2022-2023 年印度北方邦西部对冬小麦进行了滴灌(DI)和漫灌(FI)田间对照试验。灌溉处理包括 50%MAD(最大允许耗竭)(滴灌)、55%MAD(滴灌)、60%MAD(滴灌)、50%MAD(漫灌)、当地农民田间复制(漫灌)、雨水灌溉和充足灌溉处理(滴灌)。灌溉处理的 CWSI 平均值在第一季为 0.03 至 0.66,在第二季为 0.06 至 0.57。50%MAD(DI)的季节平均 CWSI 值为 0.12(第 1 季)和 0.11(第 2 季),而 50%MAD(FI)的平均 CWSI 值较高,为 0.29(第 1 季)和 0.22(第 2 季)。50% MAD(DI)处理两季的谷物产量和水分利用效率最高。对各生长阶段的 CWSI 值和谷物产量的综合分析表明,与发芽前的 CWSI 值相比,谷物产量对发芽后的 CWSI 值更为敏感。在各生长阶段中,开花期的 CWSI 值对预测小麦产量最为关键。研究建议,与开花前和季节平均 CWSI 值相比,开花期和抽穗后的 CWSI 值对准确预测小麦产量更有意义。
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来源期刊
Journal of Agronomy and Crop Science
Journal of Agronomy and Crop Science 农林科学-农艺学
CiteScore
8.20
自引率
5.70%
发文量
54
审稿时长
7.8 months
期刊介绍: The effects of stress on crop production of agricultural cultivated plants will grow to paramount importance in the 21st century, and the Journal of Agronomy and Crop Science aims to assist in understanding these challenges. In this context, stress refers to extreme conditions under which crops and forages grow. The journal publishes original papers and reviews on the general and special science of abiotic plant stress. Specific topics include: drought, including water-use efficiency, such as salinity, alkaline and acidic stress, extreme temperatures since heat, cold and chilling stress limit the cultivation of crops, flooding and oxidative stress, and means of restricting them. Special attention is on research which have the topic of narrowing the yield gap. The Journal will give preference to field research and studies on plant stress highlighting these subsections. Particular regard is given to application-oriented basic research and applied research. The application of the scientific principles of agricultural crop experimentation is an essential prerequisite for the publication. Studies based on field experiments must show that they have been repeated (at least three times) on the same organism or have been conducted on several different varieties.
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