首页|Indigenous arbuscular mycorrhizal fungi play a role in phosphorus depletion in organic manure amended high fertility soil
Indigenous arbuscular mycorrhizal fungi play a role in phosphorus depletion in organic manure amended high fertility soil
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国家科技期刊平台
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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 0.45 µm) 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 long-term 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.
arbuscular mycorrhizal fungiphosphorus depletionhigh P soilGossypium spp.indigenous communitymesh cores
HUO Wei-ge、CHAI Xiao-fen、WANG Xi-he、William David BATCHELOR、Arjun KAFLE、FENG Gu
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College of Resources and Environmental Sciences,China Agricultural University,Beijing 100193,P.R.China
Institute of Soil and Fertilizer and Agricultural Water Saving,Xinjiang Academy of Agricultural Science,Urumqi 830091,P.R.China
国家科技期刊平台
NSTL
万方数据
维普
