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Chinese Journal of Applied Ecology ›› 2018, Vol. 29 ›› Issue (3): 909-914.doi: 10.13287/j.1001-9332.201803.031

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Effects of intercropping Chinese milk vetch on functional characteristics of soil microbial community in rape rhizosphere.

ZHOU Quan1,2, WANG Long-chang1*, XING Yi1, MA Shu-min1, ZHANG Xiao-duan1, CHEN Jiao1, SHI Chao1   

  1. 1College of Agronomy and Biotechnology, Southwest University/Key Laboratory of Eco-environments in Three Gorges Reservoir Region, Ministry of Education/Engineering Research Center of South Upland Agriculture, Ministry of Education, Chongqing 400716, China;
    2Research Center on Ecological Sciences, Jiangxi Agricultural University, Nanchang 330045, China
  • Received:2017-07-17 Online:2018-03-18 Published:2018-03-18
  • Contact: * E-mail: wanglc2003@163.com
  • Supported by:

    This work was supported by the Special Fund for Agro-scientific Research in the Public Interest (201503127) and the National Natural Science Foundation of China (31271673)

Abstract: The application of green manure is facing serious problems in purple soil region of southwest China. With the aim to explore the potential application of green manure, we examined the functional characteristics of soil microbial community in a system of Chinese milk vetch intercropped with rape. The innovations are the application of Chinese milk vetch in dry land of the southwest China and the establishment of new planting pattern of rape by providing empirical data. Results showed that the intercropping with Chinese milk vetch decreased the carbon resource use efficiency of microbial community in rape rhizosphere, especially for the utilization of carbohydrates. At the same time, Shannon index, Simpson index, and richness were reduced, but evenness index was increased by intercropping. Those results from cluster analysis and principal component analysis suggest that the soil microbial community composition was significantly different between monocropping and intercropping. The carbohydrates, amino acids and carboxylic acids were the sensitive carbon sources for differentiating the changes of the microbial community induced by monocropping and intercropping. Intercropping Chinese milk vetch could decrease functional activity, change community composition, and reduce diversity of soil microbial community in rape rhizosphere.