数字农科院2.0

Response of Summer Maize Growth and Water Use to Different Irrigation Regimes

文献类型： 外文期刊

作者： Chao Huang;Shoutian Ma;Yang Gao;Zugui Liu;Anzhen Qin;Ben Zhao;Dongfeng Ning;Aiwang Duan;Xuchen Liu;Haiqing Chen;Zhandong Liu

作者机构：

关键词： summer maize;water consumption;water use efficiency;yield response factor

期刊名称： Agronomy

ISSN： 2073-4395

年卷期： 2022 年 12 卷 4 期

页码：

收录情况： JCR（2021版）

摘要： Summer maize crop development, yield, and water use characteristics under water deficit conditions at different growth stages were investigated in this study using different irrigation regime treatments at the seedling (S), jointing (J), tasseling (T), and grain filling stages (F) in 2018 and 2019 in China. Ten different irrigation treatments were set, including three-irrigation application intervals (JTFi, STFi, SJFi, SJTi), two-irrigation applications (STi, JTi, JFi), and single-irrigation applications (Ti, Ji). These were compared to the control treatment (CK), which had sufficient irrigation provided at four intervals (SJTFi). The results showed that compared to CK, a water deficit at the seedling and jointing stages had a greater effect on plant height, whereas a water deficit at the tasseling and filling stages had a greater effect on the leaf area index, and a continuous water deficit had an effect on the stem diameter of summer maize. Limitations in terms of the growth and development of summer maize increased with less frequent irrigation. As irrigation decreased, the grain yield decreased, and the water use efficiency increased, and a water deficit at the tasseling stage had the greatest effect on the yield and water use efficiency. The JTFi treatment was the optimal irrigation regime with a yield decline, and its water consumption was reduced by 16.9% (p < 0.05) on average. However, compared to CK, the water use efficiency of the JTFi treatment increased by 17.3% (p <0.05). Moreover, the JTFi treatment had the smallest maize yield response factor value (Ky ) of 0.16, and its comprehensive score was the second highest after CK.

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