数字农科院2.0

Organic management promotes nitrogen transformation in tea plantations soil: A case study from southwestern China

文献类型： 外文期刊

作者： Xinhui Huang;Biao Wang;Panfeng Li;Anqiang Chen;Jixiao Cui;Yuanquan Chen;Wangsheng Gao

作者机构：

关键词： Metagenomics;Organic management;Soil nitrogen cycling;Tea plantations

期刊名称： Applied Soil Ecology

ISSN： 0929-1393

年卷期： 2025 年 206 卷

页码：

收录情况： SCIE（2025版）

摘要： The insufficient soil nitrogen supply and its transformation mechanisms, along with the impact of organic management at various growth stages of tea plants on soil nitrogen cycling in organic tea plantations, are poorly understood. To elucidate the nitrogen transformation mechanism and enhance agronomic practices in organic tea plantations, we investigated the soil nitrogen-cycling microbiome and nitrogen cycling abundance (reflecting nitrogen transformation potential) in tea plantations aged 11, 16, and 24 years under both organic management (OM) and conventional management (CM). Specifically, OM11, OM16, and OM24 represent plantations that transitioned to organic management during the cultivating period (seedling stage), at 2 years old (juvenile stage), and at 10 years old (adult stage), respectively. The results demonstrated that the nitrogen transformation potential was enhanced by 28 % and 37 % in OM16 and OM24 compared to CM, respectively. In OM16, the abundance of nirD in dissimilatory nitrate reduction (DNRD) reduced by 53 %, while genes involved in assimilatory nitrate reduction (ANRD), DNRD, denitrification, nitrate assimilation, methylaspartate cycle, and nitrogen fixation had an increase of 24 %–2900 % compared to CM16. Meanwhile, in OM24, genes involved in DNRD, denitrification, nitrate assimilation, nitrification, and methylaspartate cycle exhibited a 50 %–1200 % increase over CM24. Microorganisms involved in soil nitrogen cycling were similar between OM and CM, while their abundance varied significantly. The pH and Betaproteobacteria were the key factors influencing nitrogen transformation. In summary, these results underscored the positive effect of long-term organic management on the nitrogen transformation in the tea plantation soil, and it exhibited a significant promoting effect when organic management was initiated at 2 years old (juvenile stage) and 10 years old (adult stage).

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