SOIL BACTERIAL COMMUNITY STRUCTURE AND DIVERSITY OF BROWN CONIFEROUS FOREST IN DAXING'ANLING MOUNTAIN, CHINA

In order to understand the changes in soil habitats and soil bacterial diversity of three different forest types in Daxing'anling mountain in northeastern China, three typical forest types were selected for study. The results showed that there were differences in soil nutrients between three forest types. The bacterial diversity of three forest types showed that brown grass coniferous forest was the highest. The result showed that the main bacteria were Acidobacteria (39.53%), Proteobacteria (34.99%), Actinobacteria (6.08%), Bacteroidetes (3.88%), Gemmatimonadetes (2.77%) and Verrucomicrobia (2.46%). Redundant analysis showed that the OTU (97%) composition of soil bacteria in the three forest types and the contribution rates of the two axes were 53.39 and 27.81%, respectively. TN, AN, AP, TK, AK, OC, pH are related with the bacterial community of brown coniferous forest, MC and TP related with the bacterial diversity of brown grass forest coniferous and typical brown coniferous forest.