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Impacts of Elevated CO2 and a Nitrogen Supply on the Growth of Faba Beans (Vicia faba L.) and the Nitrogen-Related Soil Bacterial Community

文献类型： 外文期刊

作者： Dong, Xingshui 1 ; Lin, Hui 2 ; Wang, Feng 2 ; Shi, Songmei 1 ; Wang, Zhihui 3 ; Sharifi, Sharifullah 1 ; Ma, Junwei 2 ; He, Xinhua 1 ;

作者机构： 1.Southwest Univ, Coll Resources & Environm, Ctr Excellence Soil Biol, Natl Base Int S&T Collaborat Water Environm Monito, Chongqing 400715, Peoples R China

2.Zhejiang Acad Agr Sci, Inst Environm Resource Soil & Fertilizers, State Key Lab Managing Biot & Chem Threats Qual &, Hangzhou 310021, Peoples R China

3.Sichuan Univ, State Key Lab Hydraul & Mt River Engn, Chengdu 610065, Peoples R China

4.Sichuan Univ, Coll Water Resource & Hydropower, Chengdu 610065, Peoples R China

5.Univ Calif Davis, Dept Land Air & Water Resources, Davis, CA 90616 USA

6.Univ Western Australia, Sch Biol Sci, Perth 6009, Australia

关键词： Nitrosomonadaceae; Nitrososphaeraceae; redundancy analysis; Rhizobiaceae; soil microbial community

期刊名称：PLANTS-BASEL （ 影响因子：4.1； 五年影响因子：4.5 ）

ISSN： 2223-7747

年卷期： 2024 年 13 卷 17 期

页码：

收录情况： SCI

摘要： Ecosystems that experience elevated CO2 (eCO(2)) are crucial interfaces where intricate interactions between plants and microbes occur. This study addressed the impact of eCO(2) and a N supply on faba bean (Vicia faba L.) growth and the soil microbial community in auto-controlled growth chambers. In doing so, two ambient CO2 concentrations (aCO(2), daytime/nighttime = 410/460 ppm; eCO(2), 550/610 ppm) and two N supplement levels (without a N supply-N0-and 100 mg N as urea per kg of soil-N100) were applied. The results indicated that eCO(2) mitigated the inhibitory effects of a N deficiency on legume photosynthesis and affected the CO(2 )assimilation efficiency, in addition to causing reduced nodulation. While the N addition counteracted the reductions in the N concentrations across the faba beans' aboveground and belowground plant tissues under eCO(2), the CO2 concentrations did not significantly alter the soil NH4+-N or NO3--N responses to a N supply. Notably, under both aCO(2) and eCO(2), a N supply significantly increased the relative abundance of Nitrososphaeraceae and Nitrosomonadaceae, while eCO(2) specifically reduced the Rhizobiaceae abundance with no significant changes under aCO(2). A redundancy analysis (RDA) highlighted that the soil pH (p < 0.01) had the most important influence on the soil microbial community. Co-occurrence networks indicated that the eCO(2) conditions mitigated the impact of a N supply on the reduced structural complexity of the soil microbial communities. These findings suggest that a combination of eCO(2) and a N supply to crops can provide potential benefits for managing future climate change impacts on crop production.

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