生态环境学报2017，Vol.26Issue(7)：1114-1121,8.DOI:10.16258/j.cnki.1674-5906.2017.07.004
安徽查湾自然保护区常绿阔叶林不同林分土壤微生物群落代谢特征
Metabolic Characteristics of Soil Microbial Community in Different Stands of Subtropical Evergreen Broad-leaved Forest at Chaiwan Natural Reserve in Qimen, Anhui
摘要
Abstract
In order to reveal the relationship between soil microbial function diversity and stand structure, two different stands of evergreen broad-leaved forest in Chaiwan Natural Reserve in Qimen County, Anhui Province, were selected. One stand (P1) was dominated by Castanopsis sclerophylla, and another (P2) dominated by Cyclobalanopsis glauca, Pinus massoniana and Castanea seguinii, and each set three repeating plots. The relationship between functional diversity of soil microbial community and stand structure was discussed by Biolog method. The results showed that the concentrations of soil NH4+-N, NO3--N, dissolved organic carbon (DOC) and nitrogen (DN) in P2 were higher than in P1 with no significant difference. The soil nutrients in 0~10 cm soil layer were significantly higher than in 10~20 cm. After 48 h of inoculation, the AWCD values of 0~10 cm and 10~20 cm soil layers were greater in P2 than in P1. The Shannon-Wiener (H), Simpson (D), Mclntosh (U) and richness (S) indices in 0~10 cm soil layer were higher in P2 than in P1, with significant differences in H' and D between P2 and P1 (P=0.03, P=0.02). There were no significant differences in those indices in 10~20 cm soil layers between P1 and P2. In 0~10 cm soil layer, the high utilization by soil microbes were alcohols and carbohydrates in P1, while were carbohydrates and esters in P2. In 10~20 cm soil layer, the high utilization by soil microbes was alcohols in P1, while amines and alcohols in P2. The results of redundancy analysis (RDA) showed that NH4+-N, stand basal area, richness index, soil water content, DOC, DN had great effect on soil microbial carbon-source utilization. The microbial carbon-source metabolism was positively correlated with NH4+-N, richness index, soil water content, DN. There were negative cor-relations between microbial carbon-source metabolism and stand structure parameters except for richness index. The result indicates that the soil microbial metabolism is controlled by stand structure in this subtropical evergreen broad-leaved forest.关键词
土壤微生物群落/林分因子/群落代谢特征/Biolog方法Key words
soil microbial community/forest structure/community metabolic characteristics/Biolog method分类
农业科技引用本文复制引用
戴允泽,傅欣蕾,张莎莎,关梦冉,张丹丹,徐小牛..安徽查湾自然保护区常绿阔叶林不同林分土壤微生物群落代谢特征[J].生态环境学报,2017,26(7):1114-1121,8.基金项目
国家自然科学基金项目(31370626 （）
31070588) （）
国家"973"计划项目(2012CB416905) （2012CB416905）
