Empirical evidence that manganese enrichment accelerates decomposition

文献类型： 外文期刊

第一作者： Sun, Tao

作者： Sun, Tao;Yu, Chunxiao;Wei, Zhanbo;Wang, Lingli;Wu, Zhijie;Zhang, Lili;Yu, Chunxiao;Berg, Bjorn;Berg, Bjorn;Liu, Xinyue;Feng, Chen;Bai, Wei;Bai, Wei

作者机构：

关键词： Decomposition; Plant litter; Lignin; Manganese; Manganese peroxidase

期刊名称：APPLIED SOIL ECOLOGY （ 影响因子：4.046； 五年影响因子：4.884 ）

ISSN： 0929-1393

年卷期： 2021 年 168 卷

页码：

收录情况： SCI

摘要： Our understanding of the controls regulating the rate of litter decomposition is important for improving confidence in the parameterization of carbon cycle-climate feedbacks. Traditional conceptual models rely primarily on climate and lignin/N ratios as the main regulators of decomposition. Here we studied the effects of manganese (Mn) addition on long-term decomposition across 18 substrates in a laboratory incubation. Mn addition remarkably promoted later stage of decomposition, resulting into a smaller fraction of slowly decomposing litter. This dynamic is closely associated with the changes of activities of manganese peroxidase, an important enzyme with greater capacity for lignin degradation. Our findings suggest the necessity of incorporating the interaction of Mn and decomposition into biogeochemical models.

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