土壤2012，Vol.44Issue(4)：570-575,6.
添加生物质炭对红壤水稻土有机碳矿化和微生物生物量的影响
Effects of Biochar Amendments on Soil Organic Carbon Mineralization and Microbial Biomass in Red Paddy Soils
摘要
Abstract
Influences of biochar amendments on soil organic carbon (SOC) mineralization and microbial biomass carbon and nitrogen contents were investigated in red paddy soil collected from Jiangxi Province through two incubation tests. The results showed that the mineralization rate of SOC reached maximum at the 2nd day of incubation and decreased rapidly until the 7"' day. then tended to stable afterwards. Throughout the 56 days of incubation, biochar amendments of 0.5% and 1.0% reduced cumulative mineralization of SOC by 10.0% and 10.8% respectively. In addition, applying biochar significantly increased the contents of soil microbial biomass. Compared with the treatments without biochar (CK), microbial biomass carbon and nitrogen contents in soil treated wilh 0.5% of biochar increased by 111.5% - 250.6% and 11.6% - 97.6%, microbial biomass carbon and nitrogen contents in soil treated with 1.0% of biochar increased by 58.9% - 243.6% and 55.9% - 110.4%, respectively. In the same treatments, microbial biomass contents in drought condition (40% water-holding capacity) were higher than those in wet condition (70% water-holding capacity).The results also indicated that biochar amendments of 0.5% and 1.0% decreased metabolic quotients by 2.4% and 26.8%, microbial quotients by 43.7% and 31.7%, respectively.关键词
红壤/生物质炭/有机碳/矿化/微生物生物量Key words
Red soils, Biochar/ Soil organic carbon/ Mineralization. Microbial biomass分类
农业科技引用本文复制引用
匡崇婷,江春玉,李忠佩,胡锋..添加生物质炭对红壤水稻土有机碳矿化和微生物生物量的影响[J].土壤,2012,44(4):570-575,6.基金项目
中国科学院知识创新重要方向项目(KZCX2-YW-Q1-07)和国家自然科学基金项目(41001143)资助. （KZCX2-YW-Q1-07）
