%0 Journal Article %A CAO Feng-Yan %A PENG Yao %A QU Lai-Ye %T Effects of Fire Intensity on the Soil Microbial Community of Larch gmelinii Forests %D 2017 %R 10.7525/j.issn.1673-5102.2017.04.010 %J Bulletin of Botanical Research %P 549-555 %V 37 %N 4 %X We studied theeffects of fire intensity on the soil microbial community of larch forests by selecting three kinds of sites including high intensity burned site, light intensity burned site and unburned site in the current year burning in the Daxing'an Mountain. Soils were sampled from 0-5 and 5-10 cm, separately in each site, and the soil microbial characteristics were analyzed by phospholipid fatty acid(PLFAs). The pH, total potassium, available phosphorus and clay and sand content were significantly compared with burned and unburned sites. The total soil microbial biomass, bacteria biomass, fungus biomass and Frankia biomass were influenced by fire, there was no significant difference in three sites. However, the structure of soil microbial community indictors, such as G+/G-and F/B, were significantly different compared high intensity burned site and other two sites. By RDA analysis, G+/G-was influenced by soil water content, and F/B was influenced by soil pH.Therefore, the current year of burning, soil water content and pH are critical factors in affecting the structure of soil microbial community. %U https://bbr.nefu.edu.cn/EN/10.7525/j.issn.1673-5102.2017.04.010