文献类型：期刊文献

英文题名：Long-Term Thinning Does not Significantly Affect Soil Water-Stable Aggregates and Diversity of Bacteria and Fungi in Chinese Fir (Cunninghamia lanceolata) Plantations in Eastern China

作者：Cheng, Xiangrong[1] Xing, Wenli[1] Yuan, Haijing[1] Yu, Mukui[1]

第一作者：成向荣

通信作者：Cheng, XR[1]

机构：[1]Chinese Acad Forestry, Inst Subtrop Forestry, East China Coastal Forest Ecosyst Res Stn, Hangzhou 311400, Zhejiang, Peoples R China

年份：2018

卷号：9

期号：11

外文期刊名：FORESTS

收录：;WOS:【SCI-EXPANDED(收录号:WOS:000451310300027)】；

基金：This project was supported by the National Key Research and Development Program of China (No. 2017YFC0505500, 2017YFC0505502), the National Natural Science Foundation of China (Grant No. 31300519), and the Fundamental Research Funds for the Central Non-Profit Research Institution of CAF (CAFYBB2014QB013).

语种：英文

外文关键词：thinning; soil water-stable aggregate; soil organic carbon; soil nitrogen; bacterial diversity; fungal diversity

摘要：Soil structure and microbial communities are sensitive to forest disturbance. However, little is known about the long-term effects of forest thinning on water-stable aggregates (WSA), and the community composition and diversity of soil microorganisms. In this study, we investigated soil chemical properties, WSA, and communities of bacteria and fungi in conventionally managed Chinese fir plantation stands and repeatedly thinned plantation stands with medium and high tree densities 18 years after the thinning treatments. The distribution patterns of WSA fractions were similar in the three thinning treatments. The mass proportion was the highest in the macro-aggregates fraction, followed by the clay + silt fraction, and it was the lowest in the micro-aggregates fraction. The soil organic carbon (SOC) concentrations in different WSA fractions decreased with decreasing aggregate size. The WSA fractions, stability, and aggregate-associated carbon were not significantly different among the three treatments 18 years after the thinning treatments. The total nitrogen concentration of the macro-aggregates fraction was significantly higher in the stands thinned intensively than in the conventionally managed stands. The abundance of minor bacteria and fungi species was different, although no significant differences were observed in the overall bacterial and fungal composition and diversity between the three treatments. Our results indicate that, compared with the conventionally managed stands, soil WSA stability and soil microbial communities in repeatedly thinned Chinese fir stands may recover over one rotation of Chinese fir plantation and that this is accompanied by the recovery of stand growth and soil nutrition.