Long-term combined subsoiling and straw mulching conserves water and improves agricultural soil properties

文献类型： 外文期刊

第一作者： Yang, Yonghui

作者： Yang, Yonghui;Wu, Jicheng;Gao, Cuimin;Yang, Yonghui;Liu, Hao;Yang, Yonghui;Wu, Jicheng;Gao, Cuimin;Yang, Yonghui;Wu, Jicheng;Gao, Cuimin;Zhang, Sensen;Tang, Darrell W. S.

作者机构：

关键词： long-term; soil macropore; soil organic carbon; soil properties; subsoiling combined with straw mulching

期刊名称：LAND DEGRADATION & DEVELOPMENT （ 影响因子：4.7； 五年影响因子：5.0 ）

ISSN： 1085-3278

年卷期： 2023 年

页码：

收录情况： SCI

摘要： Subsoiling and straw mulching are two techniques that conserve soil water and improve the sustainability of agricultural production. However, the benefits to soil sustainability of combining subsoiling with straw mulching under intensive rotation between wheat and maize remain uncertain. We conducted a field experiment to determine the long-term impacts of conventional tillage with straw mulching (CS), and subsoiling with straw mulching (SS), on soil macropore characteristics (>160 mu m), soil aggregate characteristics, and soil hydraulic parameters at 0-100 cm depths. Results indicate that SS increased the mean macropore number (66.9%), macroporosity (93.5%), pore circularity (3.5%), field moisture capacity (11.8%), saturated moisture content (21.4%), available soil moisture content (24.1%), and the saturated hydraulic conductivity (39.3%) in the shallowest 50 cm of soil, and total organic carbon content (34.5%) and soil labile organic carbon (20.2%) in the shallowest 30 cm of soil, compared to CS. Compared with CS, SS was more effective at increasing the proportion of aggregates larger than 0.25 mm in the top 20 cm of soil and decreasing the proportion of aggregates smaller than 0.25 mm in the top 30 cm of soil. Correlations between soil organic carbon and various soil physical properties under different practices suggest that SS has larger causative effects on soil physical properties than CS. Therefore, SS is recommended over CS.

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