不同利用方式下红壤微生物生物量及代谢功能多样性的变化  

Changes of Microbial Biomass and Functional Diversity in Red Soil Under Different Land Use Types

作　　者：刘明[1,2] 李忠佩[1,2] 张桃林[2] 

机构地区：[1]土壤与农业可持续发展国家重点实验室(中国科学院南京土壤研究所),南京210008 [2]中国科学院研究生院,北京100049

出　　处：《土壤》2009年第5期744-748,共5页Soils

基　　金：国家重点基础研究发展计划"973"项目(2007CB109301);中国科学院知识创新工程重大项目(KSCX1-YW-09-08)资助

摘　　要：研究了不同农林利用方式下红壤微生物生物量和代谢功能多样性等土壤质量指标的变化。结果表明:不同利用方式对土壤质量各指标造成了显著的影响;稻田的微生物生物量碳、氮最高,林地和草地微生物生物量次之,旱地的微生物生物量碳、氮最低(分别是稻田利用方式的4.3%和13.7%);稻田的微生物代谢功能多样性最高,旱地、林地和草地的细菌代谢功能多样性较低,旱地的真菌代谢功能多样性最低;微生物生物量和代谢功能多样性可以作为反映土壤质量变化的早期敏感的指标,用来衡量管理措施的改变对土壤质量造成的影响。Changes of microbial biomass and functional diversity in red soil were determined under different land use types. Results showed that land use type significantly influenced the various aspects of soil quality. Soil microbial biomass was higher in paddy soil, but medium in grassland and forestry, while in arid-land soil the contents of microbial biomass C and N were minimum （4.3% and 13.7% of those in paddy soil respectively）. Microbial functional diversity was higher in paddy soil, while bacterial diversity was lower in arid-land, forestry and grassland, fungal functional diversity was lowest in arid-land soil. Microbial biomass and functional diversity, as an early and sensitive indicator, could be used to evaluate the effect of land use type or management on soil quality.

关 键 词：红壤 利用方式 微生物生物量 微生物代谢功能多样性 

分 类 号：S154[农业科学—土壤学]