文献类型： 外文期刊

作者： Wei-Ge, Huo ¹ ; Xiao-Fen, Chai ¹ ; Xi-He, Wang ² ; Batchelor, William David ³ ; Kafle, Arjun ⁴ ; Gu, Feng ¹ ;

作者机构： 1.China Agr Univ, Coll Resources & Environm Sci, Beijing 100193, Peoples R China

2.Xinjiang Acad Agr Sci, Inst Soil & Fertilizer & Agr Water Saving, Urumqi 830091, Peoples R China

3.Auburn Univ, Biosyst Engn Dept, Auburn, AL 36849 USA

4.North Carolina State Univ, Dept Crop & Soil Sci, Raleigh, NC 27695 USA

关键词： arbuscular mycorrhizal fungi; phosphorus depletion; high P soil; Gossypium spp; indigenous community; mesh cores

期刊名称：JOURNAL OF INTEGRATIVE AGRICULTURE （ 影响因子：4.384； 五年影响因子：4.021 ）

ISSN： 2095-3119

年卷期： 2022 年 21 卷 10 期

页码：

收录情况： SCI

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 0.45 mu m) 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.