[Effects of land use change on soil labile organic carbon in Central Jiangxi of China].
Selecting the 15-year abandoned land (AL) and three forest lands [Phyllostachys edulis plantation (PE), Schima superba secondary forest (SS), and Cunninghamia Lanceolata plantation (CL)] in Anfu County of Jiangxi Province as test objects, this paper studied the effects of land use change on the soil organic carbon (SOC) pool and soil labile organic carbon (SLOC) contents. The soil organic carbon (SOC), microbial biomass carbon (MBC), hot- water extractable carbon (HWC), and readily oxidizable carbon (ROC) contents in the test lands were all in the order of PE>CL>SS>AL. As compared with those in AL, the SOC content, soil carbon stock, and soil labile organic carbon (SLOC) contents in the three forest lands all decreased with increasing soil depth, and had an obvious accumulation in surface soil. The proportions of different kinds of SLOC to soil total organic carbon differed markedly, among which, ROC had the highest proportion, while MBC had the smallest one. There existed significant relationships between SOC, MBC, HWC, and ROC. The MBC, HWC, and ROC contained higher content of active carbon, and were more sensitive to the land use change, being able to be used as the indicators for evaluating the soil quality and fertility in central Jiangxi Province.
International Centre for Bamboo and Rattan, Key Laboratory of Bamboo and Rattan, State Forestry Administration, Beijing 100102, China. dumy@icbr.ac.cn
Man-Yi
MY
Du
International Centre for Bamboo and Rattan, Key Laboratory of Bamboo and Rattan, State Forestry Administration, Beijing 100102, China.
Shao-Hui
SH
Fan
International Centre for Bamboo and Rattan, Key Laboratory of Bamboo and Rattan, State Forestry Administration, Beijing 100102, China.
Guang-Lu
GL
Liu
International Centre for Bamboo and Rattan, Key Laboratory of Bamboo and Rattan, State Forestry Administration, Beijing 100102, China.
Liang-Hua
LH
Qi
International Centre for Bamboo and Rattan, Key Laboratory of Bamboo and Rattan, State Forestry Administration, Beijing 100102, China.
Bao-Hu
BH
Guo
International Centre for Bamboo and Rattan, Key Laboratory of Bamboo and Rattan, State Forestry Administration, Beijing 100102, China.
Xiao-Lu
XL
Tang
Jiangxi Academy of Forestry, Nanchang 330032, China.
Fu-Ming
FM
Xiao
D002244:Carbon / Q000032:analysis*; D002681:China; D032486:Cunninghamia / Q000254:growth & development*; D065928:Forests; D009930:Organic Chemicals / Q000032:analysis; D006109:Poaceae / Q000254:growth & development*; D012987:Soil / Q000737:chemistry*; D012988:Soil Microbiology
D009930:Organic Chemicals; D012987:Soil; D002244:Carbon