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Chinese Journal of Applied Ecology ›› 2017, Vol. 28 ›› Issue (11): 3751-3758.doi: 10.13287/j.1001-9332.201711.039

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Effects of tree species transition on soil microbial community composition and functions in subtropical China

DING Guo-chang1,2, WANG Xiao-hua3, YANG Qi-fan4, LIN Qun-xing5, HUANG Zhi-qun3*   

  1. 1 College of Arts &Landscape Architecture, Fujian Agriculture and Forestry University, Fuzhou 350002, China
    2 National Engineering Research Center for Forest Parks, State Fore-stry Administration, Fuzhou 350007, China
    3 College of Geographical Science, Fujian Normal University, Fuzhou 350007, China
    4 College of Forestry, Fujian Agriculture and Forestry University, Fuzhou 350002, China
    5 Lingshi Mountain Forest Park, Fuqing 350305, Fujian, China
  • Online:2017-11-18 Published:2017-11-18
  • Contact: *mail:zhiqunhuang@hotmail.com
  • Supported by:
    This work was supported by the National Natural Science Foundation of China (41371269) and the Forestry Seeds and Seedlings Research in Fujian Province (Min Financial Document[2016]250)

Abstract: We employed a comparative study to examine the effects of tree species transition on soil microbial biomass, community composition and enzymes activities under Cunninghamia lanceolata (Lamb.) Hook, Eucalyptus grandis and a N-fixing species, Acacia melanoxylon in subtropical China. Results showed that the effect of tree species on soil microbial community and enzymes activities was significant only in the 0-10 cm soil layer. Reforestation with N-fixing species A. melanoxylon on the C. lanceolata harvest site significantly increased the total phospholipid fatty acid (PLFA), fungal PLFAs, Gram-positive bacterial PLFAs, Gram-negative bacterial PLFAs and actinomycetes biomasses in the 0-10 cm soil layer. The principal component analysis (PCA) showed that the soil microbial community composition in A. melanoxylon soil differed significantly from that in C. lanceolata and E. grandis soils. N-fixing species (A. melanoxylon) significantly enhanced the percent abundance of Gram-positive bacteria, Gram-negative bacteria and actinomycetes. Activities of cellobiohydrolase, N-acetyl-β-d-glucosaminidase and acid phosphatase were significantly higher under A. melanoxylon than under C. lanceolata and E. grandis plantations. Our results suggested that reforestation with N-fixing species, A. melanoxylon on C. lanceolata harvest site could increase soil microbial biomass, enzyme activities and soil organic matter content.