Impact of no tillage vs. conventional tillage on the soil bacterial community structure in a winter wheat cropping succession in northern China

文献类型： 外文期刊

第一作者： Dong, Wenyi

作者： Dong, Wenyi;Liu, Enke;Yan, Changrong;Zhang, Hengheng;Zhang, Yanqing;Dong, Wenyi;Liu, Enke;Yan, Changrong;Zhang, Hengheng;Zhang, Yanqing;Tian, Jing

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关键词： Tillage systems;Soil properties;Bacterial;Community structure

期刊名称：EUROPEAN JOURNAL OF SOIL BIOLOGY （ 影响因子：2.846； 五年影响因子：3.618 ）

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收录情况： SCI

摘要： A comprehensive evaluation of the impacts of different tillage managements on bacterial community structure is fundamental to better understand their roles in maintaining soil health. The objective of this study was to assess the impact of no tillage (NT) vs. conventional tillage (CT) management on soil properties, bacterial community structure in a 22-year experiment established on the Loess Plateau of China, under a winter wheat cropping succession. Our results showed that the long-term application of NT caused a significant increase in bacterial alpha -diversity as indicated by the significantly greater number of unique operational taxonomic units (OTUs), richness (Chao), evenness (ACE), and Shannon index and a lower Simpson index compared to CT. Moreover, the NT treatment changed certain soil physicochemical properties, e.g., soil organic carbon (SOC), total nitrogen (TN), dissolved organic carbon (DOC), microbial biomass C (MBC), microbial biomass N (MBN) and nitrate nitrogen (NO3-N) were greater under CE The bacterial communities differed significantly between the different tillage treatments, and NT harboured relatively higher abundances of the dominant genera Sphingomonas and Pseudomonas and a lower abundance of Acidobacteria than CT. A redundancy analysis (RDA) revealed that the bacterial community structure was strongly correlated with variations of SOC, DOC and TN. Thus, based on these findings, it is concluded that NT management is a more sustainable faming practice to improve soil properties and bacterial diversity. (C) 2017 Elsevier Masson SAS. All rights reserved.

分类号： S154

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