不同耕作和轮作下潮棕壤微生物生物量及周转特征  

Characteristics of turnover and soil microbial biomass in meadow brown soil under different rotation and tillage systems

作　　者：史奕[1] 李德文[1] 孟凡祥[1] 陈欣[1] 

机构地区：[1]中国科学院沈阳应用生态研究所陆地生态过程重点实验室,辽宁沈阳110016

出　　处：《农业系统科学与综合研究》2006年第3期221-224,共4页System Sciemces and Comprehensive Studies In Agriculture

基　　金：辽宁省自然科学基金项目(20032016);中国科学院沈阳生态实验站资助项目

摘　　要：通过对下辽河平原不同耕作和轮作措施下潮棕壤微生物生物量C、N及周转进行研究,结果表明,土壤微生物生物量C、N的变化趋势表现为,表层(0cm^5cm)高于下2层;在免耕实施6年后表层土壤微生物生物量C平均比常规耕作高12.4%;在相对比较干旱的情况下,免耕土壤微生物更新比常规耕作快。图2,表2,参8。The characteristics of turnover and soil microbial biomass in meadow brown soil were studied under different rotation and tillage systems at lower Liaohe river plain. The results showed that changes of soil microbial biomass C, N in top layer （0cm - 5cm） were higher than in low layers. The soil microbial biomass C in zero tillage treatments increased by 12.4% compared to those in conventional tillage in 0cm - 5cm depth layer after 6 years. Under condition of relative drought, the turnover of soil microbial biomass C in zero tillage treatments was faster than those in conventional tillage.

关 键 词：潮棕壤 微生物生物量 周转特征 土壤微生物 

分 类 号：S154.3[农业科学—土壤学]