Black locust coppice stands homogenize soil diazotrophic communities by reducing soil net nitrogen mineralization

作     者：Kun Li Huimei Tian W.Keith Moser Steven T.Overby L.Scott Baggett Ruiqiang Ni Chuanrong Li Weixing Shen Kun Li;Huimei Tian;W.Keith Moser;Steven T.Overby;L.Scott Baggett;Ruiqiang Ni;Chuanrong Li;Weixing Shen

作者机构：Mountain Tai Forest Ecosystem Research Station of State Forestry AdministrationKey Laboratory of State Forestry Administration for Silviculture of the Lower Yellow RiverForestry College of Shandong Agricultural UniversityTai'an271018ShandongChina Rocky Mountain Research StationUnited States Forest Service2500 S.Pine Knoll Dr.FlagstaffAZ86001USA Rocky Mountain Research StationUnited States Forest Service240 West Prospect Fort CollinsCO80526USA Mount Tai Scenic Spot Management CommitteeTai'an271000ShandongChina 

出 版 物：《Forest Ecosystems》 (森林生态系统（英文版）)

年 卷 期：2022年第9卷第3期

页      面：289-300页

核心收录：

学科分类：0907[农学-林学] 08[工学] 0829[工学-林业工程] 09[农学] 

基　　金：supported by the Agricultural Science and Technology Fund for Forestry Sci-tech Innovation Project of Shandong Province (No.2019LY005) the National Natural Science Foundation of China (No.31570705) Shandong Province Higher School Science and Technology Plan Project (No. J16LF09) and Shandong Province Natural Science Foundation (No. ZR2018PC006) 

主　　题：Black locust plantation nifH gene Nitrogen mineralization Coppice Soil nutrient 

摘      要：Background:Black locust(BL,Robinia pseudoacacia)is considered a promising tree species for reforestation due to its great ability to fix ***,after two or three coppice-harvesting rotations,the productivity of BL *** soil microbial communities are affected and how these groups correlate with the nitrogen mineralization process across multi-generation stands remains ***:We investigated the composition and structure of free-living nitrogen-fixing microorganisms(diazotrophs)by sequencing the marker gene nifH and compared these results to levels of soil nitrogen mineralization in the bulk soil and rhizosphere in black locust plantations on Mount Tai,***:The results showed multi-generation BL coppice plantations decreased the total soil nitrogen(N),soil phosphorus(P),soil microbial biomass N(MBN),soil microbial biomass C(MBC),soil nitrification rate(Rn),soil ammonification rate(Ra),and net soil N mineralization rate(Rm),but significantly increased the concentration of soil NH_(4þ)-N to maintain sufficient NO_(3)^(-)*** dominant species in bulk soil and rhizosphere changed from Rhodopseudomonas(22.62%and 15.76%),unclassified_c_Alphaproteobacteria(22.37%and 29.28%),unclassified_o_Rhizobiales(15.40%and 13.31%),Bradyrhizobium(12.00%and 11.74%)in seedling plantations to Bradyrhizobium(45.95%and 47.86%)and Rhodopseudomonas(43.56%and 41.84%)in coppice plantations,*** test and Redundancy analysis(RDA)revealed that Rn,Ra,and Rm were the most important factors shaping the diazotrophic ***:Our results suggest that the multi-generation BL coppice plantation can homogenize soil diazotrophic communities,which is mainly regulated by the available N loss caused by nitrogen *** the management technology of coppice plantations will provide more beneficial external consumption.