Crop Residue Return Rather Than Organic Manure Increases Soil Aggregate Stability under Corn-Soybean Rotation in Surface Mollisols

文献类型： 外文期刊

第一作者： Xiao, Yang

作者： Xiao, Yang;Zhou, Meng;Liu, Xiaobing;Xiao, Yang;Zhou, Meng;Li, Yansheng;Zhang, Xingyi;Wang, Guanghua;Jin, Jian;Liu, Xiaobing;Ding, Guangwei;Zeng, Xiannan

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关键词： crop residue return; manure; aggregate stability; soil organic carbon; Mollisols

期刊名称：AGRICULTURE-BASEL （ 影响因子：3.408； 五年影响因子：3.459 ）

ISSN：

年卷期： 2022 年 12 卷 2 期

页码：

收录情况： SCI

摘要： Fertilization practices change soil organic carbon content and distribution, which is relevant to crop rotation and soil aggregates. However, how fertilization management under corn-soybean rotation affects soil organic carbon and aggregate stability at different soil depths in Mollisols is unclear. The effects of 6-yr fertilization under corn-soybean rotation on aggregate stability, soil organic carbon content and storage, and size distribution in soil aggregates were investigated. Five different fertilization practices were carried out in 2013: corn and soybean without fertilizer; corn with chemical fertilizer, soybean without fertilizer; corn with chemical fertilizer, soybean without fertilizer, returning the corn and soybean residues; corn and soybean with chemical fertilizer; and corn with chemical fertilizer, soybean with farmyard manure. Compared with corn and soybean without fertilizer, returning the corn and soybean residues increased bulk SOC content, and enhanced mean weight diameter and geometric mean diameter values at 0-10 cm because of increased water-stable aggregates (WSA) larger than 2 mm proportion and decreased WSA(<0.053mm) proportion. Simultaneously, corn with chemical fertilizer and soybean with farmyard manure increased bulk soil organic carbon content but reduced mean weight diameter and geometric mean diameter values at 0-20 cm due to increased WSA(2mm) proportion. Altogether, the application of consecutive returning crop residues and chemical fertilizer in alternate years is the most favorable approach for soil organic carbon accumulation and aggregate stability at 0-10 cm under corn-soybean rotation in Mollisols.

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