文献类型：期刊文献

英文题名：Soil microbial diversity and network complexity promote phosphorus transformation - a case of long-term mixed plantations of Eucalyptus and a nitrogen-fixing tree species

作者：Li, Jiyin[1] You, Yeming[1,2] Zhang, Wen[3] Wang, Yi[4] Liang, Yuying[1] Huang, Haimei[1] Ma, Hailun[1] He, Qinxia[1] Ming, Angang[2,5] Huang, Xueman[1,2]

第一作者：Li, Jiyin

通信作者：Huang, XM[1];Huang, XM[2]

机构：[1]Guangxi Univ, Guangxi Coll & Univ Key Lab Cultivat & Utilizat Su, Coll Forestry, Guangxi Key Lab Forest Ecol & Conservat, Nanning 530004, Guangxi, Peoples R China;[2]Youyiguan Forest Ecosyst Observat & Res Stn Guangx, Guangxi Youyiguan Forest Ecosyst Natl Observat & R, Pingxiang 532600, Guangxi, Peoples R China;[3]Jiangxi Acad Agr Sci, Jinggangshan Inst Red Soil, Jian 343016, Jiangxi, Peoples R China;[4]Int Ctr Bamboo & Rattan, Beijing Bamboo & Rattan Sci & Technol, Inst Resources & Environm, Key Lab,Natl Forestry & Grassland Adm, Beijing 100102, Peoples R China;[5]Chinese Acad Forestry, Expt Ctr Trop Forestry, Pingxiang 532600, Peoples R China

年份：2025

卷号：22

期号：16

起止页码：4221-4239

外文期刊名：BIOGEOSCIENCES

收录：;WOS:【SCI-EXPANDED(收录号:WOS:001556520300001)】；

基金：This research was funded by grants from the National Natural Science Foundation of China (nos. 32171755 and 32471727), the Guangxi Natural Science Foundation (no. 2025GXNSFAA069288), and the scientific research capacity building project for Youyiguan Forest Ecosystem Observation and Research Station of Guangxi (no. AD25069098).

语种：英文

摘要：Increased nitrogen (N) availability influences soil phosphorus (P) cycling through multiple pathways. Soil microorganisms are essential facilitating a wide range of ecosystem functions. However, the impact of how mixed plantations of Eucalyptus and N-fixing tree species affect P transformation and microbiota interactions remains unknown. Therefore, we conducted a 17 y field experiment comparing pure Eucalyptus plantations (PPs) and mixed plantations (MPs) with Eucalyptus and an N-fixing tree species to assess their effects on soil P transformation, using data collected from two soil layers (0-10 and 10-20 cm). The results showed that alpha-diversity indices (ACE, Chao1, and Shannon indices) were significantly higher in MPs than in PPs for both bacteria and fungi. Furthermore, MPs exhibited significantly higher relative abundances of bacterial phyla Proteobacteria (0-10 cm), Verrucomicrobia, and Rokubacteria, as well as fungal phyla Mortierllomycota, Mucoromycota, and Rozellomycota. Conversely, MPs showed lower abundances of the bacterial phyla Chloroflexi, Actinobacteria, and Planctomycetes and the fungal phylum Ascomycota. Gene copy numbers of functional genes were also elevated in MPs, including 16S rRNA, internal transcribed spacer (ITS), N functional genes [nifH (0-10 cm), AOB-amoA, narG, nirS, and nosZ (0-10 cm)], and P functional genes [phoC, phoD (0-10 cm), BPP, and pqqC]. The findings indicate that MPs can enhance soil microbial diversity, network complexity, and the relative abundance of functional genes, which involved N and P transformation, by optimizing soil nutrient levels and pH, thereby facilitating P transformation. Therefore, MPs of Eucalyptus and N-fixing tree species may represent a promising forest management strategy to improve ecosystem P benefits.