不同利用强度下草原土壤微生物的生物量和数量的动态研究  

Dynamic of microorganisms and microbial biomass under different use intensity in steppe soil

作　　者：高雪峰[1] 武春燕[2] 韩国栋[3] 

机构地区：[1]内蒙古师范大学生命科学与技术学院,呼和浩特010022 [2]内蒙古农业大学生物工程学院,呼和浩特010018 [3]内蒙古农业大学生态环境学院,呼和浩特010019

出　　处：《干旱区资源与环境》2011年第5期188-191,共4页Journal of Arid Land Resources and Environment

基　　金：国家自然科学基金项目(30360022)资助

摘　　要：以内蒙古克什克腾旗西部的典型草原为研究对象,根据对草原利用强度的不同,将其划分三个不同区域,研究了各区域土壤中微生物数量、微生物生物量和土壤呼吸强度的季节动态以及利用强度对他们的影响。结果表明:微生物数量、微生物生物量以及土壤的呼吸作用强度均有较明显的季节性变化,且峰值都出现在8月份。三者之间具有极显著的正相关关系;轻度和适度利用有利于土壤中的微生物数量、生物量的增加,而过度或重度利用则会导致土壤中微生物数量和生物量的减少。The typical steppe inside Dalinuoer National Nature Reserve, west of Keshenketeng County in Inner Mongolian was divided into three parts according to the different use intensities; the dynamic changes of soil microorganism, soil microbial biomass and soil respiration intensity with the seasonal change in steppe, and the effects on them under different use intensity were studied. The results showed that they all had a dynamic changes with the seasonal change. The highest numbers appeared in august. There had very significant positive correlation among them; light and moderate use of grassland were beneficial to soil microorganisms, biomass increase, but excessive or severe use of grassland would result in the soil micro -organisms and biomass reduction.

关 键 词：典型草原 利用强度 微生物数量 微生物生物量 动态变化 

分 类 号：S154[农业科学—土壤学]