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Chinese Journal of Applied Ecology ›› 2021, Vol. 32 ›› Issue (3): 878-886.doi: 10.13287/j.1001-9332.202103.37

• Original Articles • Previous Articles     Next Articles

Structure and function of soil bacterial communities in the monoculture and mixed plantation of Pinus massoniana and Castanopsis hystrix in southern subtropical China

LIANG Yan1, MING An-gang2,3, HE You-jun4, LUO Ying-hua1, TAN Ling1, QIN Lin1,5*   

  1. 1Guangxi Key Laboratory of Forest Ecology and Conservation, College of Forestry, Guangxi University, Nanning 530004, China;
    2Experiment Center of Tropical Forestry, Chinese Academy of Forestr, Pingxiang 532600, Guangxi, China;
    3Guangxi Youyiguan Forest Ecosystem Research Station, Pingxiang 532600, Guangxi, China;
    4Research Institute of Forestry Policy and Information, Chinese Academy of Forestry, Beijing 100091, China;
    5State Key Laboratory for Conservation and Utilization of Subtropical Agro-Bioresources, Guangxi University, Nanning 530004, China
  • Received:2020-08-02 Accepted:2020-12-03 Online:2021-03-15 Published:2021-09-15
  • Contact: * E-mail: nilniq@gxu.edu.cn
  • Supported by:
    National Natural Science Foundation of China (31560109)

Abstract: Establishing monoculture of native broadleaved tree species and mixed coniferous broadleaved plantations is the tendency for forest management in subtropical China. The variations of structure and function of soil bacterial community in monoculture and mixed tree plantations are still not clear. We examined soil bacterial community structure and function under different soil layers (0-20, 20-40 and 40-60 cm) in three planted forests, including broadleaved Castanopsis hystrix, coniferous Pinus massoniana and their mixed plantation, in south subtropical China, using 16S rRNA gene high-throughput sequencing and PICRUSt prediction. The results showed that soil bacterial community structure of mixed plantation and P. massoniana plantation were similar but being significant different from that in C. hystrix plantation. The diversity, biological pathways metabolic function, and nitrogen cycling function of soil bacterial community in C. hystrix plantation were lower than those in P. massoniana plantation and mixed plantation. Soil total nitrogen, nitrate nitrogen and C/N were the main factors driving the variations of soil bacterial community structure and function among different forest types. Our results suggested that the mixed plantation of C. hystrix and P. massoniana is better than C. hystrix plantation in this area in terms of soil bacterial community structure and function.

Key words: soil bacterial community, high-throughput sequencing, PICRUSt prediction, nitrogen cycling functional genes, plantation