放牧对草地土壤微生物影响的研究述评

综述了我国不同放牧强度对草地土壤微生物区系组成、微生物数量及土壤微生物的时空分布变化研究,草地的不同利用方式对土壤微生物的影响。草地土壤微生物类群主要由真菌、细菌和放线菌等组成,它们也是草地土壤微生物中数量最大的3个类群,其中,细菌数量最多,放线菌次之,真菌最少。在空间上,草地土壤微生物数量表现为随土层的加深逐渐减少,季节分布表现为春季随温度的上升逐渐增高,最高峰出现在8月中旬,冬季降到最低。因此微生物在草地生态系统的能量流动和物质转化中起着重要的作用。

Research progress on effect of grazing on soil microbes of grassland

This paper summarized the research of different grazing intensities on compose of soil microbes,number of microbes and change of microbes in time-space of grassland in China,and the effect of different utilization ways on microbes. Soil microbes of grassland were composed of fungi,bacteria and actinomycete,which were the most three populations. The number of soil bacteria was the highest,the second was actinomycete,and the number of fungi was the lowest. In spatial,the numbers of soil microbes were all grad...