JOURNAL OF NANJING FORESTRY UNIVERSITY ›› 2016, Vol. 59 ›› Issue (05): 14-20.doi: 10.3969/j.issn.1000-2006.2016.05.003

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Effect of biochar on soil microbial biomass and the diversity of carbon source metabolism in poplar plantation

XU Wenhuan1, DENG Fangfang1, FANG Shuiyuan1, WANG Guobing1, RUAN Honghua1*, CAO Guohua2   

  1. 1.Co-Innovation Center for Sustainable Forestry in Southern China,College of Biology and the Environment, Nanjing Forestry University, Nanjing 210037, China;
    2. Dongtai City Forest Farm of Jiangsu Province, Dongtai 224200, China
  • Online:2016-10-18 Published:2016-10-18

Abstract: Biochar is evaluated as a means to improve soil physicochemical properties and to mitigate climate change, which has received widespread attention. This study targeted on poplar plantation in Dongtai in Jiangsu Province and designed four different levels of biochar: CK(0), T1(40 t/hm2), T2(80 t/hm2)and T3(120 t/hm2)to investigate how biochar and seasonal changes affect soil physicochemical parameters, microbial biomass and metabolic activity of carbon sources. The result showed as follow: soil moisture content decreased after the addition of biochar, while soil pH significantly increased. Biochar caused the decrease of SMBN(soil microbial biomass nitrogen), and its values presented significant seasonal changes: the values in winter and spring were higher than that in summer and autumn; whereas biochar did not change the seasonal SMBC(soil microbial biomass carbon)in this study but it presented the significant seasonal changes. High level of biochar(T3)improved the AWCD(average well color change)value of microbes on Eco-plate, but exerted no effect on diversity of carbon source metabolism. However, compared with the effects of biochar, seasonal changes exerted more dramatic effect on microbial metabolic patterns.

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