JOURNAL OF NANJING FORESTRY UNIVERSITY ›› 2013, Vol. 37 ›› Issue (05): 45-48.doi: 10.3969/j.issn.1000-2006.2013.05.009

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Soil microbial biomass carbon dynamics of Phyllostachys edulis forests under different managing patterns in the hilly region of central Hunan, southern China

QI Lianghua1, AI Wensheng2, FAN Shaohui1*, DU Manyi1, MENG Yong2, MAO Chao1   

  1. 1. International Center for Bamboo and Rattan, Beijing 100102, China;
    2. Hunan Academy of Forestry, Changsha 410004, China
  • Online:2013-10-18 Published:2013-10-18

Abstract: Based on plot data of shoot utilizing (Ⅰ), shoot and timber utilizing (Ⅱ) and timber utilizing (Ⅲ) of Phyllostachys edulis forests located at the hilly region in central Hunan, a study had been carried out on vertical distribution, seasonal dynamics soil microbial biomass carbon (SMBC) concentrations and storages as well as their relationship with soil temperature and moisture in above three typical managing patterns. The results showed that the average SMBC concentrations of type Ⅰ, Ⅱ and Ⅲ were 18.92-118.42 mg/kg, 21.19-133.66 mg/kg and 19.56-119.46 mg/kgrespectively, and storages were 0.12-0.74 t/hm2, 0.14-0.91 t/hm2 and 0.11-0.70 t/hm2 respectively. The vertical distribution showed that SMBC concentrations and storages decreased with the increase of soil depth in three different forests, moreover, the soil layers of 0-20 cm were the main distribution of SMBC. For seasonal dynamics, SMBC concentrations and storages were the highest in July and the lowest in January. SMBC was significantly positively related with soil temperature and their relationship could be described well by power exponent. However, there existed a nonlinear relationship between SMBC and soil moisture. It was effective in some extent for increasing SMBC concentrations and storages along with soil temperature and moisture rise increase.

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