Long-term agricultural cultivation decreases microbial nutrient limitation in coastal saline soils

文献类型： 外文期刊

第一作者： Li, Guanjun

作者： Li, Guanjun;Wang, Jianming;Li, Jingwen;Li, Guanjun;Ma, Zhi;Wei, Liang;Ge, Tida;Wu, Cuiyan;Chen, Hao;Guo, Bin

作者机构：

关键词： Land use types; Soil enzyme; Stoichiometry; Microbial nutrient limitation; Microbial carbon use efficiency

期刊名称：SCIENCE OF THE TOTAL ENVIRONMENT （ 影响因子：8.2； 五年影响因子：8.6 ）

ISSN： 0048-9697

年卷期： 2024 年 949 卷

页码：

收录情况： SCI

摘要： Soil enzyme activities are pivotal for diverse biochemical processes and are sensitive to land use changes. They can indicate soil microbial nutrient . Nonetheless, the mechanism governing the response of soil microbial nutrient limitation to land use alterations in coastal regions remains elusive. We assessed soil nutrients, microbial biomass, and extracellular enzyme activities across various land use types-natural (wasteland and woodland) and agricultural (farmland and orchard)-in the Hangzhou Bay area, China. All four land use types experience co-limitation by carbon (C) and phosphorus (P). However, the extent of microbial resource limitations varies among them. Long-term agricultural practices diminish microbial C and P limitations in farmland and orchard soils compared to natural soils, as evidenced by lower ecoenzymatic C:N ratios and vector lengths, alongside higher microbial carbon use efficiency (CUE). Soil nutrient stoichiometric ratios and CUE are primary factors influencing microbial C and P limitations. Thus, fostering appropriate land use and management practices proves imperative to regulate soil nutrient cycles and foster the sustainable management of coastal areas.

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