Long-term manure and straw addition enhance protistan diversity and stimulate soil microbial interactions and nutrient mineralization in vegetable field

文献类型： 外文期刊

第一作者： Zhang, Yinjie

作者： Zhang, Yinjie;Zhang, Qian;Wang, Yilun;Gao, Wei;Huang, Shaowen;Tang, Jiwei;Li, Mingyue;Ai, Chao;Li, Chenyang

作者机构：

关键词： Protistan communities; Microbial network stability; Enzyme stoichiometry; Soil nutrients

期刊名称：APPLIED SOIL ECOLOGY （ 影响因子：5.0； 五年影响因子：5.4 ）

ISSN： 0929-1393

年卷期： 2025 年 212 卷

页码：

收录情况： SCI

摘要： Fertilization is crucial for agriculture as it influences yield and soil quality by regulating soil structure, nutrient transformation, and microbial interactions. This study aimed to examine how long-term organic fertilization affects protists and microbial interactions in regulating nutrient turnover in soil aggregates. Compared to chemical fertilizers application, manure and straw addition increased the contents of soil organic carbon (C), total phosphorus (P), dissolved C, mineral nitrogen (N), and available P due to a higher proportion of large macroaggregates. Manure and straw addition enhanced enzymes activities for acquiring C, N, and P, and alleviated microbial N limitation. The enzyme activities of C and P-acquiring was higher in microaggregates, whereas N-acquiring enzyme was higher in large macroaggregates. Manure and straw addition significantly boosted protistan diversity and exhibited the highest connectivity and stability of the protistan-bacterial-fungal network. Mainly bacterivores, omnivores, and phototrophs significantly correlated to organic C, and mineral N. Further, organic fertilization positively correlated with microbial network stability and enzyme activity, whereas aggregate size has negative effect. Stable microbial networks positively influenced enzyme activity and the availability of dissolved C and nutrients. Overall, integrating chemical fertilizer, manure, and straw application can boost protistan diversity and stabilize microbial networks, enhancing nutrient availability, which offers insights for improving soil fertility and crop productivity.

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