绿肥填闲种植下土壤细菌群落特性对土壤多功能性的调控  

Characteristics of Soil Bacterial Communities Regulate Soil Multifunctionality Under Green Manure Catch Cropping

作　　者：李桂龙 王于娟 冷珂 陈晓芬 秦文婧[1] 陈静蕊[1] 万里 陈先茂[1] 彭春瑞[1] 刘佳[1] LI Guilong;WANG Yujuan;LENG Ke;CHEN Xiaofen;QIN Wenjing;CHEN Jingrui;WAN Li;CHEN Xianmao;PENG Chunrui;LIU Jia(Soil and Fertilizer&Resources and Environment Institute,Jiangxi Academy of Agricultural Sciences,National Engineering&Technology Research Center for Red Soil Improvement,Key Laboratory of Acidified Soil Amelioration and Utilization,Ministry of Agriculture and Rural Affairs,Nanchang 330200,China)

机构地区：[1]江西省农业科学院土壤肥料与资源环境研究所,国家红壤改良工程技术研究中心,农业农村部酸化土改良与利用重点实验室,南昌330200

出　　处：《土壤》2024年第6期1253-1261,共9页Soils

基　　金：国家重点研发计划项目(2021YFD1901201);江西省农业科学院项目(JXSNKYJCRC202301,JXSNKYJCRC202325)资助。

摘　　要：为研究绿肥填闲种植下土壤细菌群落在调节土壤多功能性中的作用,选取4种不同冬绿肥(黑麦草、肥田萝卜、毛叶苕子、油菜),以冬闲田(CK)为对照,在旱地红壤进行了大田试验,评估了细菌生物量、物种丰富度、网络复杂度及群落组成对土壤多功能性的影响。结果表明:绿肥填闲种植提升了土壤多功能性,特别是肥田萝卜和油菜处理,较冬闲处理分别提高了54.36%和55.65%。绿肥填闲种植诱导的土壤细菌群落物种丰富度、网络复杂度及优势菌门(变形杆菌门和芽单胞菌门)丰度的增加与较高的土壤多功能性有关。细菌群落物种丰富度是土壤多功能性的关键驱动因素,其作用比细菌网络复杂度和群落组成更强。综上,绿肥填闲种植驱动的土壤细菌群落物种丰富度的增加对促进土壤多功能性至关重要。To explore the role of soil bacterial communities in mediating soil multifunctionality under green manure catch cropping,four winter green manure varieties,with the winter idle field as the control(CK),were used in a field experiment to evaluate the contributions of soil bacterial biomass,species richness,network complexity,and community composition to soil multifunctionality in dryland Ultisols.The results showed that catch cropping promoted soil multifunctionality,especially for the Raphanus sativus L.and Brassica napus L.,which were 54.36%and 55.65%higher than those of CK,respectively.Moreover,this catch cropping-induced increase in bacteria species richness,network complexity,and dominant taxa abundance(Proteobacteria and Gemmatimonadota)were associated with higher soil multifunctionality.Importantly,the species richness of soil bacteria was the key driver of soil multifunctionality,with a stronger effect than soil bacterial network complexity and community composition.This study highlights the importance of catch cropping-induced increase in bacteria species richness for promoting soil multifunctionality.

关 键 词：绿肥 细菌群落 土壤多功能性 物种丰富度 网络复杂度 

分 类 号：S154.3[农业科学—土壤学]