JOURNAL OF NANJING FORESTRY UNIVERSITY ›› 2016, Vol. 59 ›› Issue (05): 1-8.doi: 10.3969/j.issn.1000-2006.2016.05.001

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Effects of different fertilizers regimes on the functional diversity of soil microbes under poplar plantation

ZHANG Yakun, PENG Sai, SONG Qianyun, ZHANG Wenwen, GUO Jiaojiao, WANG Guobin, RUAN Honghua*   

  1. Co-Innovation Center for Sustainable Forestry in Southern China, College of Biology and the Environment, Nanjing Forestry University, Nanjing 210037, China
  • Online:2016-10-18 Published:2016-10-18

Abstract: Effects of different fertilizers on the functional diversity of soil microbes under 8 years old poplar plantation in a coastal area of eastern China were investigated using Biolog-Eco method in this study. We fertilized in June 2013 and set up six fertilizing treatments including no fertilizer(CK), NPK chemical fertilizer(T1), Manure fertilizer(T2), Biochar(T3), NPK fertilizer plus biochar(T4), and manure fertilizer plus biochar(T5). We collected soil samples in August 2014, October 2014, December 2014 and March 2015,respectively. The results showed that: ① Fertilizer applications increased SMBC and SMBN, and T4, T5 treatments increased soil pH, TC(total C), TC/TN and the microbial biomass were significantly higher than other treatments. T3 treatment changed microbial structure. ② Fertilizer applications changed the functional diversity of soil microbial community. T2, T3, T4 and T5 treatments improved soil microbial activity and carbon utilization capacity of soil microbial community; carbon utilization ability of T5 treatment was the highest, while NPK treatment decreased carbon utilization ability. ③ The carbon utilization ability was significantly higher in summer than that in autumn and winter, but the carbon utilization ability of T5 treatment in spring was the highest. It was known that fertilizer applications promoted growth of soil microbes. Except for NPK fertilizer, others improved soil microbial activity, and manure plus biochar mostly changed the functional diversity of soil microbes.

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