农业环境科学学报2011，Vol.30Issue(11)：2368-2373,6.
添加14C标记稻草对喀斯特典型土壤有机碳矿化的影响
Effect to the Turnover of Soil Organic Carbon in Three Typical Soils in Karst Area by Adding 14C-labelled Organic Matter
摘要
Abstract
In order to indicate the effect of organic matter on soil organic carbon (SOC) turnover, two Karst soils (terra fusca and rendzina) and a contrast soil (red soil) were chosen (0~ 15 cm) for a study. Three typical soil samples were selected and a 100 d incubation experiment was conduct with no added(CK) and 14C-straw added(Tl ) treatment. Mineralization of SOC, microbial biomass C and field turnover time of microbial biomass were measured and analyzed in 100d- soil incubation experiments. The result showed that gross and field turnover time of microbial biomass were(71 ± 2)d,(243 ± 20)d,(254 ±45)d and 0.29 a, 1.00 a, 1.04 a. Adding exogenous organic matter had positive excitation in red soil, negative excitation in terra fusca, no excitation in rendzina. This showed that in the same condition, rendzina and terra fusca are more likely to accumulation of organic carbon than red soil.关键词
喀斯特/土壤/14C标记/MBC表观周转时间/激发效应Key words
Karst/ soil/ 14C-labelled/ MBC-turnover time/ priming effect分类
农业科技引用本文复制引用
胡乐宁,苏以荣,何寻阳,李杨,王嫒华,吴金水..添加14C标记稻草对喀斯特典型土壤有机碳矿化的影响[J].农业环境科学学报,2011,30(11):2368-2373,6.基金项目
中国科学院知识创新重要方向项目(KSCX2-YW-436) （KSCX2-YW-436）
中国科学院战略性先导科技专项(XDA05070403) （XDA05070403）
国家自然科学基金面上项目(40671104) （40671104）
亚热带农业生态研究所青年人才领域前沿项目(ISACX-LYQY-QN-1101) （ISACX-LYQY-QN-1101）
