典型黑土中细菌类群组成特征及影响因素

Characteristics and Influencing Factors of Bacterial Community Composition in Black Soil

以黑龙江省典型黑土表土为研究对象,采用16S rRNA高通量测试分析技术,研究土壤中细菌类群的分布特征及影响因素.研究结果表明:黑土中细菌群落均呈现丰富类群OTU数量少相对丰度占比较高.稀有类群OTU数量多相对丰度占比较低的特点;稀有类群在组成上更能体现出黑土之间的细菌群落差异性,有机碳、全氮、总磷是影响细菌丰富类群和稀有类群结构组成的主要环境因子.

In this study,the typical black topsoil from Heilongjiang Province was collected,and highthroughput sequencing of 16S rRNA was carried out to study the distribution of the bacterial taxa in the soil.We found bacterial community in chernozem had a small number of high-abundance oTUs,but their relative abundance was high;concurrently,while the low-abundance oTUs was in large number,their relative abundance was low.The difference between the bacterial community in the chernozem soils was reflected appropriately by the composition of the low abundance taxa.Organic carbon,total nitrogen and total phosphorus are the main environmental factors that affect the structure of abundant and rare bacterial groups.