Indigenous arbuscular mycorrhizal fungi play a role in phosphorus depletion in organic manure amended high fertility soil  

作　　者：HUO Wei-ge CHAI Xiao-fen WANG Xi-he William David BATCHELOR Arjun KAFLE FENG Gu 

机构地区：[1]College of Resources and Environmental Sciences,China Agricultural University,Beijing 100193,P.R.China [2]Institute of Soil and Fertilizer and Agricultural Water Saving,Xinjiang Academy of Agricultural Science,Urumqi 830091,P.R.China [3]Biosystems Engineering Department,Auburn University,AL 36849,USA [4]Department of Crop and Soil Sciences,North Carolina State University,NC 27695,USA

出　　处：《Journal of Integrative Agriculture》2022年第10期3051-3066,共16页农业科学学报（英文版）

基　　金：financially supported by the Beijing Natural Science Foundation,China(6202015);the National Natural Science Foundation of China(U1703232);the Hatch Project(ALA014-1-16016)funded by the National Institute of Food and Agriculture,US Department of Agriculture。

摘　　要：The species richness and propagule number of arbuscular mycorrhizal fungi(AMF)are high in intensively-managed agricultural soils.Past research has shown that AMF improve crop phosphorus(P)uptake under low soil P conditions,however it is unclear if AMF play a role in high Olsen-P soils.In this study,we investigated whether native fungal benefits exist under high P input field conditions in-situ and contribute to P utilization.We installed in-grow tubes which were sealed with different membrane pore sizes(30 or 0.45μm)to allow or prevent AMF hyphae access to the hyphal compartment and prevent cotton roots from penetrating the chamber.We used the depletion of soil available P(Olsen-P)in the hyphae accessed compartment to indicate P uptake by the native AMF community.Our results showed that the native AMF mediated P depletion and microbial biomass P(MBP)turnover and caused the largest Olsen-P depletion ratio and MBP turnover ratio in the high P treatments(Olsen-P:78.29 mg kg^(-1)).The cotton roots in each fertilization regime were colonized by a unique AMF community and Glomus and Paraglomus were the dominant genera,implying the longterm fertilization regimes domesticated the AMF community.We conclude that native AMF caused the P depletion and P turnover even under high soil Olsen-P conditions.

关 键 词：arbuscular mycorrhizal fungi phosphorus depletion high P soil Gossypium spp. indigenous community mesh cores 

分 类 号：S154.3[农业科学—土壤学] S158[农业科学—农业基础科学]