文献类型：期刊文献

英文题名：Thinning alters nitrogen transformation processes in subtropical forest soil: Key roles of physicochemical properties

作者：Yao, Liangjin[1] Wu, Chuping[1] Jiang, Bo[1] Wu, Ming[2] Shao, Xuexin[2] Li, Niu[2]

第一作者：Yao, Liangjin

通信作者：Li, N[1]

机构：[1]Zhejiang Acad Forestry, Hangzhou 310023, Peoples R China;[2]Chinese Acad Forestry, Res Inst Subtrop Forestry, Wetland Ecosyst Res Stn Hangzhou Bay, Hangzhou 311400, Peoples R China

年份：2024

卷号：949

外文期刊名：SCIENCE OF THE TOTAL ENVIRONMENT

收录：;EI(收录号：20243216812779);Scopus(收录号：2-s2.0-85200236158);WOS:【SCI-EXPANDED(收录号:WOS:001288089600001)】；

基金：This study was supported by the Cooperation of Zhejiang Province and the Chinese Academy of Forestry (grant nos. 2024SY10 and 2023SY11) , the Zhejiang Province Commonwealth Projects (grant nos. LQ23C030001 and LQ23C030003) , "Pioneer" and "Leading Goose" R & D Program of Zhejiang (grant no. 2022C02053) and the National Key Technologies R & D Program of China (grant no. 2023YFE0101700) , National Key Research and Development Program of China (grant no. 2023YFE0101700) .

语种：英文

外文关键词：Forest management; Nitrogen cycling; Thinning intensity; Microbial activity; Soil properties

摘要：Thinning-a widely used forest management practice-can significantly influence soil nitrogen (N) cycling processes in subtropical forests. However, the effects of different thinning intensities on nitrification, denitrification, and their relationships with soil properties and microbial communities remain poorly understood. Here, we conducted a study in a subtropical forest in China and applied three thinning treatments, i.e., no thinning (0 %), intermediate thinning (10-15 %), and heavy thinning (20-25 %), and investigated the effects of thinning intensity on the potential nitrification rate (PNR), potential denitrification rate (PDR), and microbial communities. Moreover, we explored the relationships among soil physicochemical properties, microbial community structure, and nitrogen transformation rates under different thinning intensities. Our results showed that intermediate and heavy thinning significantly increased the PNR by 87 % and 61 % and decreased the PDR by 31 % and 50 % compared to that of the control, respectively. Although the bacterial community structure was markedly influenced by thinning, the fungal community structure remained stable. Importantly, changes in microbial community composition and diversity had minimal impacts on the nitrogen transformation processes, whereas soil physicochemical properties, such as pH, organic carbon content, and nitrogen forms, were identified as the primary drivers. These findings highlight the critical role of managing soil physicochemical properties to regulate nitrogen transformations in forest soils. Effective forest management should focus on precisely adjusting the thinning intensity to enhance the soil physicochemical conditions, thereby promoting more efficient nitrogen cycling and improving forest ecosystem health in subtropical regions.