摘要
选取江西省安福县15年撂荒地和3种林地(毛竹林人工林、木荷次生林、杉木人工林),研究土地利用方式改变对土壤有机碳库以及活性有机碳的影响.结果表明:不同样地的土壤总有机碳、微生物生物量碳、热水浸提有机碳和易氧化态碳均表现为毛竹人工林>杉木人工林>木荷次生林>撂荒地;与对照(撂荒地)相比,3种林地的土壤有机碳含量、碳储量及活性有机碳含量均随土壤深度增加而递减,表层富集现象明显;不同土壤活性有机碳的分配比例明显不同,其中,土壤易氧化态碳占总有机碳的比例最大,微生物生物量碳所占比例最小,土壤总有机碳、微生物生物量碳、热水浸提有机碳和易氧化态碳间的相关性均达到极显著水平.后三者表征了土壤中活性较高部分碳的含量,对土地利用方式的响应较敏感,可以作为评价赣中地区土壤质量和肥力的指标之一.
Selecting the 15-year abandoned land （AL） and three forest lands [ Phyllostachys edulis plantation （ PE）, Schima superba secondary forest （ SS）, and Cunnirtghamia 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 la- bile 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, I-/WC, and ROC. The MBC, HWC, and ROC contained higher content of active carbon, and were more sensi- tive to the land use change, being able to be used as the indicators for evaluating the soil quality and fertility in central Jiangxi Province.
出处
《应用生态学报》
CAS
CSCD
北大核心
2013年第10期2897-2904,共8页
Chinese Journal of Applied Ecology
基金
林业公益性行业科研专项(201104008)
国际竹藤中心基本科研业务费专项(1632010005)
江西省财政林业重大专项(2011511101)资助
关键词
土地利用方式
土壤有机碳
微生物生物量碳
热水浸提有机碳
易氧化态碳赣中地区
land use pattern
soil organic carbon
microbial biomass carbon
hot- water extract-able carbon
readily oxidizable carbon
central Jiangxi.
