Estimation of the crop water stress index (CWSI) of sunflower (Helianthus annuus L.) using sensor-based irrigation scheduling for different irrigation levels

Water Supply Pub Date : 2024-06-14 DOI:10.2166/ws.2024.139

Dnyaneshwar Arjun Madane, Samiksha, Gurveer Kaur

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Abstract

The crop water stress index (CWSI) is an important technique for determining stress levels in the plant and directing irrigation management techniques. To determine the CWSI for sunflower, a pot-based research trial was carried out in the research field of the Department of Soil and Water Engineering, PAU, Ludhiana (India) during the summer of 2023. The sensor-based irrigation scheduling was carried out on the basis of the depletion of total available soil moisture (TASM). The drip irrigation treatments consist of I1 (full irrigation), I2 (20% depletion of TASM), and I3 (40% depletion of TASM). The results revealed that the highest amount of water applied under I1 was recorded at 484.4 mm, while I2 (387.5 mm) and I3 (290.7 mm) during the growing season of sunflower. The results revealed that for kernel diameter and seed weight, I1 and I2 were statistically non-significant to each other while I1 and I3 were statistically significant to each other. The highest water productivity recorded for I2, followed by I3. The overall findings revealed that an average CWSI value of 0.85 for the sunflower crop falls within the range of lower and upper baselines. The response of physico-chemical properties of sunflower seeds showed a high correlation with the draught condition.

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利用不同灌溉水平下的传感器灌溉调度估算向日葵（Helianthus annuus L.）的作物水分胁迫指数（CWSI）

作物水分胁迫指数（CWSI）是确定植物胁迫水平和指导灌溉管理技术的一项重要技术。为了确定向日葵的作物水分胁迫指数，2023 年夏季在印度卢迪亚纳 PAU 水土工程系的研究田里进行了一项盆栽研究试验。基于传感器的灌溉调度是根据总可用土壤水分（TASM）的消耗情况进行的。滴灌处理包括 I1（完全灌溉）、I2（消耗 20% 的土壤水分）和 I3（消耗 40% 的土壤水分）。结果表明，在向日葵生长季节，I1 的最高施水量为 484.4 毫米，I2（387.5 毫米）和 I3（290.7 毫米）。结果表明，在籽粒直径和籽粒重量方面，I1 和 I2 在统计学上互不显著，而 I1 和 I3 在统计学上互为显著。I2 的水分生产率最高，其次是 I3。总体研究结果表明，向日葵作物的平均 CWSI 值为 0.85，属于较低和较高的基线范围。向日葵种子的物理化学特性与吃水条件有很高的相关性。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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Water Supply

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