|Table of Contents|

Effects of fire disturbance on the functional diversity of soil microbialcommunity in alpine meadows*(PDF)

Chinese Journal of Applied & Environmental Biology[ISSN:1006-687X/CN:51-1482/Q]

2016 02
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Effects of fire disturbance on the functional diversity of soil microbialcommunity in alpine meadows*
LIU Min1 WANG Changting1** ZI Hongbiao1 HU Lei1 YANG Xizhi2 & YANG Youfang1
1College of Life Science and Technology, Southwest University for Nationalities, Chengdu 610041, China2Feed Station of Yilong Agricultural Husbandry Bureau, Yilong 637600, China
fire disturbane soil microbial community alpine meadow fire disturbance Biolog-ECO carbon source utilization
S812.2 : S154.36

This study aimed to explore the effects of fire disturbance on the soil microbial community in an alpine meadow.Biolog-ECO was used to study the changes of soil microbial community composition and functional diversity of carbon sourceutilization in the early stage of fire recovery. The results showed that in the early stage of fire recovery, metabolic activity ofsoil microbial community was higher in the fire disturbed plot than the control plot, the average well color development rate(1.20) of the burned soil was higher than that of the control sample (1.07). The carbon source utilization, Shannon-Wiener,Pielou and McIntosh index of soil microbial community increased significantly by 0.037, 0.203, 1.234 and 2.340 respectively.Principal component analysis (PCA) indicated that fire disturbance changed microbial metabolic function and carbohydratewas the major carbon source type for the soil microbial community. Correlation analysis showed that soil pH, organic matter(SOM) and total phosphorus (TP) had significant correlation with microbial functional diversity indexes (P < 0.05), and thesoil available nitrogen (AN), available phosphorus (AP), available potassium (AK), total nitrogen (TN) and root soil ratio hadsignificantl positive correlation with carbohydrate carbon source (P < 0.05). In summary, in the early stage of fire recovery, soilavailable nutrients increase, resulting in significantly improved microenvironment, soil microbial metabolic activity and carbonsource utilization.


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