Soil labile organic carbon sequestration is tightly correlated with the abundance and diversity of arbuscular mycorrhizal fungi in semiarid maize fields
文献类型： 外文期刊
作者： Ren, Ai-Tian 1 ; Mickan, Bede S. 2 ; Li, Ji-Yuan 1 ; Zhou, Rui 4 ; Zhang, Xu-Cheng 5 ; Ma, Ming-Sheng 1 ; Wesly, Kipro 1 ;
作者机构： 1.Lanzhou Univ, Sch Life Sci, State Key Lab Grassland Agroecosyst, Lanzhou 730000, Peoples R China
2.Univ Western Australia, UWA Sch Agr & Environm M079, Perth, WA, Australia
3.Univ Western Australia, UWA Inst Agr, Fac Sci, Perth, WA, Australia
4.Yunnan Univ, Sch Ecol & Environm Sci, Kunming, Yunnan, Peoples R China
5.Gansu Acad Agr Sci, Inst Dryland Agr, Key Lab High Water Utilizat Drylands Gansu Prov, Lanzhou 730070, Peoples R China
关键词： community composition; diversity; dryland; plastic film mulch; soil labile organic carbon
期刊名称：LAND DEGRADATION & DEVELOPMENT （ 影响因子：4.977； 五年影响因子：5.291 ）
ISSN： 1085-3278
年卷期：
页码：
收录情况： SCI
摘要： Plastic film mulching can affect soil organic carbon (C) lability in semiarid regions. Arbuscular mycorrhizal (AM) fungi represent an important route for plant-derived C into soil and can be influenced by agricultural practices. Whether the changes of AM fungal community affect soil organic C sequestration is a fundamental question in semiarid environments. To this end, we conducted two field experiments investigating the influence of aFunneliformis mosseaeinoculation and mycorrhizal-suppression using benomyl application on maize growth, soil fractions of organic C, AM fungal parameters, including diversity profiling using the Illumina MiSeq. The results showed that AM fungal community composition was significantly altered by plastic film mulching and fungicide applications, soil organic C fractions and nitrogen were most important factors in influencing the AM fungal community. AM fungal inoculation significantly increased particulate organic C and light fraction organic C content, due to enhance dextramatrical hyphal length (EMH), glomalin content, and root biomass. Conversely, fungicide applications reduced labile organic C, possibly through decreasing EMH, glomalin content and soil AM fungal diversity. Increases in relative abundance ofF. mosseaein rhizosphere soil, coupled with increases in AM fungal root colonization fromF. mosseaeinoculation indicates successfully established by outcompeting the existing natural AM fungal community. Plastic film mulching resulted in significant increases in maize yield and water use efficiency, and AM fungal inoculation was found to amplify the effects. Thus, AM fungal inoculation may act as an effective farming practice to improve soil organic C fractions, which can boost maize productivity.
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