Shallow plough tillage with straw return increases rice yield by improving nutrient availability and physical properties of compacted subsurface soils

文献类型： 外文期刊

第一作者： Wu, Pingping

作者： Wu, Pingping;Li, Lujiu;Wang, Xiao;Wu, Pingping;Li, Lujiu;Wang, Xiao

作者机构：

关键词： Tillage; Straw return; Physicochemical properties; Integrated soil fertility; Rice yields

期刊名称：NUTRIENT CYCLING IN AGROECOSYSTEMS （ 影响因子：3.1； 五年影响因子：3.7 ）

ISSN： 1385-1314

年卷期： 2023 年

页码：

收录情况： SCI

摘要： Tillage and straw management are important factors affecting soil quality and crop productivity. However, long-term rotary tillage may form a plough pan in the subsurface (0.1-0.2 m) soil, which limits root growth and crop yields, especially in rice production in the Yangtze and Huai River regions. A 5-year lasting field experiment was conducted to study the effects of three tillage treatments [RT, rotary tillage; SPT, shallow plough tillage (0.15-0.2 m); DPT, deep plough tillage (0.25-0.3 m)], with or without straw return (S) on soil fertility, soil physical properties and rice yields. Olsen phosphorus and available potassium values of the 0.1-0.2 m soil layer were significantly higher (by 36 and 24%, respectively) in SPT + S compared to RT. The soil bulk density of the 0.1-0.2 m soil layer was 13% lower in SPT + S and 9% lower in DPT + S than in RT. Factor analysis revealed that SPT + S had the highest integrated scores of soil fertility for the 0.1-0.2 m soil layer. Rice yields were 10-43% higher in SPT + S compared to RT during the 5-year period. Rice yields were positively correlated with the integrated scores of soil fertility for the 0-0.1 and 0.1-0.2 m soil layers. Our results indicate that shallow plough tillage plus straw return is a promising management strategy for paddy fields following long-term rotary tillage.

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