文献类型：期刊文献

英文题名：Mixture enhances microbial network complexity of soil carbon, nitrogen and phosphorus cycling in Eucalyptus plantations

作者：Qin, Fangcuo[1] Yang, Fucheng[1] Ming, Angang[2,3] Jia, Hongyan[2,3] Zhou, Bingjiang[2,3] Xiong, Junfei[2,3] Lu, Junkun[1,2,3]

第一作者：Qin, Fangcuo

通信作者：Lu, JK[1]

机构：[1]Chinese Acad Forestry, State Key Lab Tree Genet & Breeding, Res Inst Trop Forestry, Guangzhou 510520, Guangdong, Peoples R China;[2]Chinese Acad Forestry, Expt Ctr Trop Forestry, Pingxiang 532600, Peoples R China;[3]Youyiguan Forest Ecosyst Observat & Res Stn Guangx, Guangxi Youyiguan Forest Ecosyst Natl Observat & R, Pingxiang 532600, Guangxi, Peoples R China

年份：2024

卷号：553

外文期刊名：FOREST ECOLOGY AND MANAGEMENT

收录：;EI(收录号：20235115253349);Scopus(收录号：2-s2.0-85179888331);WOS:【SCI-EXPANDED(收录号:WOS:001137624700001)】；

基金：We are grateful to the contribution of Chuang Tang and Zhongguo Li for fieldwork assistance. We would like to thank Tao Wen for his assistance in graphic edit. This work was jointly funded by the National Natural Science Foundation of China (32101510 and 31722012) , the Basic and Applied Basic Research Foundation of Guangdong Province (2022A1515010413) , and the Basic and Applied Basic Research Foundation of Guangzhou (202201011313) .

语种：英文

外文关键词：Mixed plantation; Soil nutrient cycling; Functional gene; Network; N 2-fixing species

摘要：Mixed-species plantations have the potential to promote soil nutrient cycling, productivity, and ecosystem function. However, the microbial mechanisms underlying the mixing effect in different stand types remain poorly understood. We studied the effect of mixtures with either one of the three N2-fixing or one of the three non-N2fixing tree species on Eucalyptus growth. Furthermore, we employed metagenomics to investigate co-occurrence networks of soil microbial community, and carbon (C), nitrogen (N), and phosphorus (P)-transformation gene in the Eucalyptus rhizosphere and bulk soil of the monospecific or mixed Eucalyptus plantations. Mixing with either N2-fixing or non-N2-fixing species can promote the network complexity rather than diversity of soil microbial community. Mixture always significantly increased Eucalyptus growth and the network complexity and stability of C, N, and P-transformation genes, but decreased their gene abundance, suggesting a trade-off between functionality and abundance stimulated by mixed-species afforestation. The positive mixing effects on Eucalyptus growth were related with the interactions between C, N, and P cycling, depending on N2-fixing functional traits. Mixtures of N2-fixing trees intensively promoted correlations between Eucalyptus growth and N and P functional genes, while non-N2-fixing trees extensively stimulated the significant correlations with both C, N, and P genes and soil total P. Our findings highlight the importance of rapid responses of soil functional microbes for nutrient cycling, for favoring productivity in mixed-species forest plantations.