Du Man-Yi, Fan Shao-Hui, Liu Guang-Lu, Qi Liang-Hua, Guo Bao-Hu, Tang Xiao-Lu, Xiao Fu-Ming
International Centre for Bamboo and Rattan, Key Laboratory of Bamboo and Rattan, State Forestry Administration, Beijing 100102, China.
Jiangxi Academy of Forestry, Nanchang 330032, China.
Ying Yong Sheng Tai Xue Bao. 2013 Oct;24(10):2897-904.
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.
选取江西省安福县15年撂荒地（AL）和3种林地[毛竹林（PE）、木荷次生林（SS）和杉木人工林（CL）]为试验对象，研究土地利用变化对土壤有机碳（SOC）库及土壤活性有机碳（SLOC）含量的影响。试验地土壤有机碳（SOC）、微生物量碳（MBC）、热水浸提碳（HWC）和易氧化有机碳（ROC）含量均表现为PE>CL>SS>AL。与撂荒地相比，3种林地的SOC含量、土壤碳储量和土壤活性有机碳（SLOC）含量均随土壤深度增加而降低，且在表层土壤有明显积累。不同类型的SLOC占土壤总有机碳的比例差异显著，其中ROC比例最高，MBC比例最小。SOC、MBC、HWC和ROC之间存在显著关系。MBC、HWC和ROC含有的活性碳含量较高，对土地利用变化更敏感，可作为评价赣中地区土壤质量和肥力的指标。
