Long-Term Chili Monoculture Alters Environmental Variables Affecting the Dominant Microbial Community in Rhizosphere Soil
文献类型： 外文期刊
作者： Chen, Wenjing 1 ; Guo, Xiaodong 1 ; Guo, Quanen 1 ; Tan, Xuelian 1 ; Wang, Zhigang 2 ;
作者机构： 1.Gansu Acad Agr Sci, Inst Soil Fertilizer & Water Saving Agr, Lanzhou, Peoples R China
2.Qiqihar Univ, Coll Life Sci Agr & Forestry, Qiqihar, Peoples R China
3.Heilongjiang Prov Technol Innovat Ctr Agromicrobi, Qiqihar, Peoples R China
4.Key Lab Efficient Utilizat Water Dry Farming, Lanzhou, Peoples R China
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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