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Labile carbon facilitated phosphorus solubilization as regulated by bacterial and fungal communities in Zea mays

文献类型： 外文期刊

作者： Huang, Yanlan 1 ; Dai, Zhongmin 1 ; Lin, Jiahui 1 ; Li, Daming 4 ; Ye, Huicai 4 ; Dahlgren, Randy A. 5 ; Xu, Jianming 1 ;

作者机构： 1.Zhejiang Univ, Coll Environm & Resource Sci, Inst Soil & Water Resources & Environm Sci, Hangzhou 310058, Peoples R China

2.Zhejiang Univ, Zhejiang Prov Key Lab Agr Resources & Environm, Hangzhou 310058, Peoples R China

3.Zhejiang Univ, Rural Dev Acad, Hangzhou 310058, Peoples R China

4.Jiangxi Inst Red Soil, Jiangxi Key Lab Red Soil Arable Land Conservat, Jinxian 331717, Peoples R China

5.Univ Calif Davis, Dept Land Air & Water Resources, Davis, CA 95616 USA

关键词： Labile carbon; Soil phosphorus availability; Phosphorus fractions; phoD harboring bacteria; Fungal community

期刊名称：SOIL BIOLOGY & BIOCHEMISTRY （ 影响因子：7.609； 五年影响因子：8.312 ）

ISSN： 0038-0717

年卷期： 2021 年 163 卷

页码：

收录情况： SCI

摘要： Organic carbon (C) is often applied to agricultural soils to increase soil organic matter, however, its mechanistic effects on soil P transformations and availability resulting from stimulation of microbial activities and changes in microbial communities remain uncertain. This study investigated the responses of soil P availability, P fractions and phoD harboring bacterial and fungal communities to two dose rates (5 and 10 mg C g(-1)dry soil) of labile C (glucose) in bulk and rhizosphere soils planted with maize in a P-deficient soil (Oxisol). Both doses of glucose significantly increased available P concentrations (over a 47-day period) in soils without maize, and in the bulk and rhizosphere soils of maize, resulting in the promotion of maize growth. Glucose additions altered soil phoD harboring bacterial and fungal community composition and stimulated the growth of keystone P-solubilizing microorganisms, such as Bradyrhizobium and Eupenicillium, in soils with maize. Co-occurrence network analysis showed that glucose enhanced interactions between phoD harboring bacterial taxa relative to that of fungal taxa, whether in individual networks or in combined networks. Our results highlight the importance of labile C in facilitating changes in soil P-solubilizing bacterial and fungal communities of a P-deficient soil. These findings provide crucial information to guide P-cycling management strategies via microbial regulation in agro-ecosystems.

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