Nitrogen and phosphorus fertilization leads to soil arbuscular mycorrhizal fungal diversity changes and rainfed crop yield increase on the Loess Plateau of China:A 37-year study  

作　　者：Yi WANG Wenting ZHANG Chunyue LI Shun CHANG Yu MIAO Qianxue LI Zhaoyang KOU Tinghui DANG 

机构地区：[1]State Key Laboratory of Loess and Quaternary Geology,Institute of Earth Environment,Chinese Academy of Sciences,Xi'an 710061,China [2]School of Geography and Tourism,Shaanxi Normal University,Xi'an 710119,China [3]Institute of Soil and Water Conservation,Northwest A&F University,Yangling 712100,China

出　　处：《Pedosphere》2024年第2期328-338,共11页土壤圈（英文版）

基　　金：jointly funded by a project of the Science and Technology Department of Shaanxi Province,China(No.2022NY-074);the National Natural Science Foundation of China(Nos.41501255 and 41671269);Xi’an Science and Technology Project,China(No.21NYYF0033);the Fundamental Research Funds for the Central Universities,China(No.SYJS202224)。

摘　　要：More than 80%of plants form mutualistic symbiotic relationships with arbuscular mycorrhizal fungi(AMF),and the application of fertilizers,such as nitrogen(N)and phosphorus(P)fertilizers,is a common agricultural management practice to improve crop yield and quality.However,the potential effects of long-term N and P fertilization on the AMF community in the rainfed agricultural system of the Loess Plateau of China are still not well understood.In this study,a long-term field experiment was conducted based on orthogonal design,with three N levels(0,90,and 180 kg ha^(-1)year^(-1))and three P levels(0,90,and 180 kg ha^(-1)year^(-1))for wheat fertilization.Changes in AMF community and correlations between AMF community composition,soil environmental factors,and wheat yield component traits were analyzed using traditional biochemical methods and high-throughput sequencing technology.The results showed that long-term N and P addition had a significant effect on the AMF community structure and composition.Nitrogen application alone significantly reduced the richness and diversity of AMF community,whereas the combined application of N and P significantly increased the richness and diversity of AMF community.The AMF community was driven mainly by soil available P,total P,and pH.There was a significant positive correlation between Glomus abundance and wheat yield and a significant negative correlation between Paraglomus abundance and wheat yield.Long-term N and P addition directly increased crop yield and affected yield indirectly by influencing soil chemical properties and the AMF community.Combined application of N and P both at90 kg ha^(-1)year^(-1)could improve the ecological and physiological functions of the AMF community and benefit the sustainable development of rainfed agriculture.

关 键 词：GLOMUS long-term fertilization microbial community Paraglomus rainfed agriculture wheat 

分 类 号：S154.3[农业科学—土壤学]