Impact of tillage practices on soil bacterial diversity and composition under the tobacco-rice rotation in China

文献类型： 外文期刊

第一作者： Lei, Yanping

作者： Lei, Yanping;Xiao, Yongliang;Li, Lifeng;Cao, Hui;Jiang, Chaoqiang;Zu, Chaolong;Li, Tian

作者机构：

关键词： straw mulching;tobacco-rice rotation;soil bacterial diversity and composition;illumina sequencing

期刊名称：JOURNAL OF MICROBIOLOGY （ 影响因子：3.422； 五年影响因子：3.28 ）

ISSN： 1225-8873

年卷期： 2017 年 55 卷 5 期

页码：

收录情况： SCI

摘要： Tobacco-rice rotation is a common farming system in south China, and many tillage practices such as straw mulching, dolomite dust, and quicklime application have been adopted to improve crop production. These agricultural management practices alter soil physical and chemical properties and affect microbial life environment and community composition. In this research, six tillage practices including no tobacco and rice straw mulching (CK), tobacco and rice straw mulching (TrSr), rice straw returning fire (TrSc), tobacco and rice straw mulching with dolomite dust (TSD), rice straw returning fire and quicklime (TSQ), and rice straw returning fire, quicklime and reduced fertilizer (TSQf) were conducted to detect changes in soil bacterial diversity and composition using Illumina sequencing. The results showed that the total number of operational taxonomic units (OTUs) from the six treatments was 2030, and the number of mutual OTUs among all samples was 550. The TrSc treatment had the highest diversity and richness, while TSQf had the lowest. Soil physio-chemical properties and microbial diversity can influence each other. Proteobacteria and Actinobacteria had the greatest proportion in all treatments. The abundance of Nitrospirae was the highest in the TrSc treatment. The TSQf treatment had the highest abundance of Firmicutes. The abundance of Nitrospira in the TrSc treatment was 2.29-fold over CK. Streptomyces affiliated with Firmicutes improved by 37.33% in TSQf compared to TSQ. TSQf treatment was considered to be the most important factor in determining the relative abundance at the genus level.

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