文献类型：期刊文献

英文题名：Continuous cropping of cut chrysanthemum reduces rhizospheric soil bacterial community diversity and co-occurrence network complexity

作者：Li, Jun[1];Cheng, Xiaoyu[1];Chu, Guixin[1];Hu, Baowei[1];Tao, Rui[1,2]

机构：[1]Shaoxing Univ, Sch Life Sci, Shaoxing 312000, Zhejiang, Peoples R China;[2]Shaoxing Univ, Sch Life Sci, Dept Environm Sci & Engn, Shaoxing 312000, Peoples R China

年份：2023

卷号：185

外文期刊名：APPLIED SOIL ECOLOGY

收录：SCI-EXPANDED(收录号：WOS:001003494700001)、、Scopus(收录号：2-s2.0-85146126236)、WOS

基金：This work was financially supported by the Basic Public Welfare Research Project of Zhejiang Province (LGN20C150003) , P. R. China, National Natural Science Foundation of China (42207367) , and China Postdoctoral Science Foundation funded project (2022M711655) .

语种：英文

外文关键词：Continuous cropping; Cut chrysanthemum; Enzymatic activity; Bacterial community; Co -occurrence networks; Diversity

外文摘要：Long-term continuous cropping causes a significant decline in the quality of cut chrysanthemum (Chrysanthemum morifolium Ramat.), but the microbial mechanism behind it remains unclear. Here, we examined the impacts of different numbers of years of continuous cropping on the bacterial communities and enzymatic activities in the rhizospheric soil of cut chrysanthemum. Our results showed that continuous cut chrysanthemum cropping for 6 years (Y6) or 12 years (Y12) significantly decreased (P < 0.05) the soil respiration rate and enzymatic activities of alkaline phosphatase and beta-glucosidase compared to cropping for only 1-year (Y1). 12 years of continuous cropping resulted in significant decreases in soil bacterial numbers and alpha-diversity (e.g., Shannon index). Continuous cropping treatments shifted the bacterial community composition, lowering the relative abundances of the phyla Proteobacteria and Acidobacteria and increasing the relative abundances of Actinobacteria and Chloroflexi. Moreover, continuous cropping reduced the bacterial network complexity relative to noncontinuous cropping. Structural equation modeling (SEM) showed that long-term continuous cropping significantly decreased the soil bacterial count and community diversity mainly because of the limitation of soil organic carbon and total nitrogen, which in turn led to a reduction in soil respiration. Overall, our results demonstrated that continuous cut chrysanthemum cropping for 12 years had negative impacts on soil bacterial diversity, community complexity and soil biological activity.