Long-Term Chili Monoculture Alters Environmental Variables Affecting the Dominant Microbial Community in Rhizosphere Soil

文献类型： 外文期刊

第一作者： Chen, Wenjing

作者： Chen, Wenjing;Guo, Xiaodong;Guo, Quanen;Tan, Xuelian;Chen, Wenjing;Wang, Zhigang;Chen, Wenjing;Wang, Zhigang;Tan, Xuelian

作者机构：

关键词： chili; continuous cropping; rhizosphere microorganisms; dominant microbial community; environmental filtering

期刊名称：FRONTIERS IN MICROBIOLOGY （ 影响因子：5.64； 五年影响因子：6.32 ）

ISSN：

年卷期： 2021 年 12 卷

页码：

收录情况： SCI

摘要： Continuous cropping negatively affects soil fertility, physicochemical properties and the microbial community structure. However, the effects of long-term chili monoculture on the dominant microbial community assembly are not known. In this study, the impact of long-term chili monoculture on the correlation between the dominant microbial community and soil environmental variables was assessed. The results indicated that increasing duration of chili monoculture generated significant changes in soil nutrients, soil aggregates and soil enzymes: nutrient contents increased overall, mechanically stable macroaggregates increased and microaggregates decreased, water-stable macroaggregates and microaggregates decreased, beta-glucosidase decreased nonlinearly, and nitrate reductase and alkaline phosphatase activities showed a nonlinear increase. Moreover, an increasing number of years of chili monoculture also affected the structure of the dominant microbiota, with substantial changes in the relative abundances of 11 bacterial and fungal genera. The drivers of the dominant microbial community assembly in rhizosphere soil were soil moisture, abiotic nitrogen, pH and salt.

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