Earthworm (Eisenia fetida) Mediated Macropore Network Formation in Black Soil: Decay Straw as a Trigger for Sustainable Tillage

文献类型： 外文期刊

第一作者： Wu, Baoguang

作者： Wu, Baoguang;Liu, Yuping;Zhang, Jinsong;Bai, Bingqi;Zhou, Deyi;Liu, Yuxin;Chen, Pu;Yin, Zhipeng;Xu, Shun;Wang, Qiuju

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关键词： black land conservation; CT (computed tomography); macropores; soil structure

期刊名称：AGRICULTURE-BASEL （ 影响因子：3.6； 五年影响因子：3.8 ）

ISSN：

年卷期： 2025 年 15 卷 13 期

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收录情况： SCI

摘要： In this study, a method for creating networked macropores through tillage using Eisenia fetida attracted by food sources derived from decomposing straw was proposed. The effects of Eisenia fetida activity and corn stalk addition, as well as the synergistic effects of Bacillus subtilis, on macropore formation were systematically studied. A 3D visualization technique was used to render the pore network model. When compared with undisturbed soil, the results demonstrate that cultivation using earthworms attracted by food sources from decomposing straw creates a soil pore structure with the most significant effect. The 3D porosity of the soil increased 6.90-fold, its average pore volume increased 5.49-fold, and its equivalent diameter increased 4.88-fold. Cylindrical pores, which accounted for the largest proportion (4.38%), had a channel radius of 1-5 mm and comprised approximately 86.7% of all macropores. The channel length increased by 28.5%, the average roundness decreased by 2.5%, and the average coordination number increased by 33.3%. The macroporous network structure formed by these earthworm-generated pores was more beneficial for improving the structure of phaeozem, offering technical support for the field application of earthworm farming.

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