Multi-Objective Optimization Water-Nitrogen Coupling Zones of Maize under Mulched Drip Irrigation: A Case Study of West Liaohe Plain, China

文献类型： 外文期刊

第一作者： Feng, Yayang

作者： Feng, Yayang;Shi, Haibin;Li, Ruiping;Miao, Qingfeng;Jia, Qiong;Feng, Yayang;Jia, Yanhui;Feng, Yayang;Shi, Haibin;Li, Ruiping;Miao, Qingfeng;Jia, Qiong

作者机构： Inner Mongolia Agr Univ, Coll Water Conservancy & Civil Engn, Hohhot 010018, Peoples R China;Chinese Acad Agr Sci CAAS, Farmland Irrigat Res Inst, Xinxiang 453002, Peoples R China;High Efficiency Water Saving Tech Equipment & Wate, Hohhot 010018, Peoples R China

关键词： water-nitrogen coupling; soil alkaline hydrolysis nitrogen residue; harvest index; yield; water-use efficiency

期刊名称：AGRONOMY-BASEL （ 2022影响因子：3.7； 五年影响因子：4.0 ）

ISSN：

年卷期： 2023 年 13 卷 2 期

页码：

收录情况： SCI

摘要： The impact of different combinations of water-nitrogen coupling on maize yield and the environment needs investigation. Low, medium, and high levels of irrigation and N application gradients were studied through field experiments to elucidate the suitable water-nitrogen coupling zone for spring maize in the West Liaohe Plain during three hydrological year patterns under drip irrigation with plastic film. The effects of different water-nitrogen couplings on maize yield, water- and nitrogen-use efficiencies (WUE and NUE), and post-harvest soil alkali-hydrolyzable N residues were studied under integrated drip irrigation by varying the application rates of water and fertilizer. A multi-objective optimization of water-nitrogen coupling zones was performed by integrating maize yield, harvest index, WUE, and soil environmental effects. Results show that with an increase in irrigation and N application rate, the residual amount of alkali-hydrolyzable N increased slowly within a certain range. Upon exceeding a certain amount, residual N increased rapidly, and more N entered the soil environment. The NUE of moderate water-nitrogen coupling treatment was high, with lower environmental risk of residual alkali-hydrolyzable N. Moderate irrigation yielded the highest harvest index in the normal hydrological year. Irrigation rate had a higher impact on yield compared to nitrogen application, because of drip irrigation under plastic film. An appropriate irrigation amount results in a higher WUE and the application of N application must be adjusted according to the rainfall in a particular year. This study highlights the need for structuring water-nitrogen coupling zones specifically for different hydrological years.

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