不同土地利用方式对土壤微生物生物量碳的影响  

Effect of Different Land Use Patterns on Soil Microbial Biomass Carbon

作　　者：宇万太[1] 姜子绍[1] 柳敏[1] 赵鑫[1] 

机构地区：[1]中国科学院沈阳应用生态研究所,辽宁沈阳110016

出　　处：《土壤通报》2008年第2期282-286,共5页Chinese Journal of Soil Science

基　　金：中国科学院野外台站基金(field station fundation of CAS);中国科学院知识创新工程重要方向项目(KZCX3-SW-433)资助;中国科学院沈阳应用生态所海外留学基金资助

摘　　要：研究了长期定位试验不同土地利用方式下土壤微生物生物量碳的变化,结果表明:裸地处理的微生物生物量碳最低;不施肥种植作物(CK)或施肥种植作物(NPK)能显著提高土壤微生物量碳含量;NPK配合猪厩肥处理的微生物体碳含量显著高于CK和NPK处理;荒地处理由于返回的植物残体量很大,积累的有机物很多,所以其微生物量碳最大;其次为割草处理和林地处理。有机质含量高的土壤其土壤微生物量也高,土壤微生物碳的周转强度也大,周转时间短,周转速率为:荒地>割草>林地>NPK+C>NPK>CK>裸地。The effect of different land used patterns on the soil microbial biomass carbon （MBC） was studied by long-tern experiment. The results showed that MBC content was the least in bare land; and MBC content increased significantly under the condition of planting crops. MBC content with NPK and recycled manure was higher than that of CK and NPK. Because of accumulating large numbers of organic matter, MBC content was the most highest in native land. MBC content was a little lower in woodland and mowing land. Both the contents of soil MBC and the turnover rate of soil MBC were increasing with soil organic matter. The rate order of soil MBC was wasteland〉mowing land〉woodland〉NPK＋C〉NPK〉CK〉bare land.

关 键 词：土地利用方式 土壤微生物量 周转率 

分 类 号：S154.2[农业科学—土壤学]