湖南农业大学学报（自然科学版）2012，Vol.38Issue(3)：314-318,5.DOI:10.3724/SP.J.1238.2012.00314
外源碳酸钙和稻草对喀斯特地区土壤活性有机碳的影响
Influence of exogenous calcium carbonate and rice straw on active organic carbon of Karst soils
摘要
Abstract
To elucidate the features of active organic carbon in Karst soils in the turnover of soil organic carbon, 14C-labeled straw and 14C-labeled calcium carbonate were respectively added to each of the terra fusca, rendzina and zonal red soil of Huanjiang Ouangxi for a 100 d incubation test. Soils with no addition were regarded as CK. Results showed that 14C-labeled straw exhibited obviously higher influence on 14C-MBC, 14C-DOC in the three soils, compared to 14C-labeled calcium carbonate (P<0.05). After 5 d of incubation, total MBC (microbial biomass carbon) reached the peak in the three soils added with 14C-labeled straw or 14C-labeled calcium carbonate, and the MBC in red soils was 231.7, 273.0 mg/kg, were respectively 70.2% and 100.5% higher than that in the CK ; the MBC in terra rusca was 288.1, 307.7 mg/kg , were respectively 23.0% and 31.3% higher than that in the CK while MBC in rendzina was 683.7, 787.2 mg/kg, were respectively 4.5% and 20.3% higher than that in the CK; DOC (dissolved organic carbon) in the three soils also reached the maximum. The MBC in rendzina was obviously higher than that in terra fusca and red soil, but the DOC in red soil was obviously higher in terra fusca, rendzina (.P<0.05). Exogenous 14C-labeled matters could promote the increase of soil active organic carbon and in the same condition, rendzina and terra rusca are more likely to accumulate organic carbon, compared to red soil.关键词
碳酸钙/稻草/土壤微生物生物量碳/溶解有机碳/14C示踪技术/喀斯特Key words
calcium carbonate/ rice straw/ microbial biomass carbon(MBC)/ dissolved organic carbon(DOC)/ 14C radioactive tracer technique/ Karst分类
农业科技引用本文复制引用
葛云辉,邹冬生,苏以荣,何寻阳..外源碳酸钙和稻草对喀斯特地区土壤活性有机碳的影响[J].湖南农业大学学报（自然科学版）,2012,38(3):314-318,5.基金项目
中国科学院战略性先导科技专项(XDA05070403) （XDA05070403）
中国科学院西部行动计划项目(KZCX2-XB3-10) （KZCX2-XB3-10）
国家自然科学基金项目(30970538,41171246) （30970538,41171246）
中国科学院亚热带农业生态研究所青年人才领域前沿项目(ISACX-LY1QY-QN-1101) （ISACX-LY1QY-QN-1101）
