Saline Water Irrigation Changed the Stability of Soil Aggregates and Crop Yields in a Winter Wheat-Summer Maize Rotation System

文献类型： 外文期刊

第一作者： Yuan, Huimin

作者： Yuan, Huimin;Zhang, Anqi;Zhu, Changkuan;Zhang, Junpeng;Yuan, Huimin;Zhu, Changkuan;Dang, Hongkai;Zheng, Chunlian;Cao, Caiyun

作者机构：

关键词： saline water irrigation; winter wheat-summer maize rotation system; soil salinity; soil alkalinity; soil sodicity; soil aggregates

期刊名称：AGRONOMY-BASEL （ 影响因子：3.4； 五年影响因子：3.8 ）

ISSN：

年卷期： 2024 年 14 卷 11 期

页码：

收录情况： SCI

摘要： Irrigation using saline water is extensively used in areas of agricultural production where freshwater is scarce. However, saline water irrigation adversely impacts soil's physicochemical characteristics and crop productivity. In this study, we established irrigation water with five salinity levels (ECiw, 1.3, 3.4, 7.1, 10.6, 14.1 dS.m(-1)) to investigate how these salinity levels influenced grain yields as well as soil salinity, alkalinity, sodicity, and aggregate stability in the 0 similar to 20 cm soil layer of a wheat and maize rotation field (in 2022-2023). Tukey's test, entropy-weighted TOPSIS, and the least squares method were used to analyze the significance analysis, comprehensively evaluate the soil aggregate stability and soil index comprehensive score (SICS), and achieve linear fitting, respectively. The results showed that when ECiw > 3.4 dS.m(-1), there was a significant increase in the soil salinity, pH, and sodium adsorption ratio. When ECiw > 7.1 dS.m(-1), a significant reduction in soil aggregate stability was observed. When ECiw <= 3.4 dS.m(-1), there was no significant reduction in the grain yields of wheat and maize. Furthermore, the annual grain yields of wheat and maize decreased by 5% and 10%, respectively, resulting in a change in ECiw values from 2.98 to 4.24 dS.m(-1), based on the linear regression analysis of SICS and ECiw, as well as the annual grain yields and SICS. Under uniform irrigation conditions, the soil salinity, alkalinity, and sodicity were lower, and soil aggregate indexes were more stable at the maturity stage of maize.

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