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Nitrogen Deposition Enhances the Positive Contribution of CO 2 Fertilization to China’s Carbon and Water Use Efficiencies

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Listed:
  • Biqin Xiao

    (School of Geography and Environmental Sciences, Guizhou Normal University, Guiyang 550025, China
    State Key Laboratory of Environmental Geochemistry, Institute of Geochemistry, Chinese Academy of Sciences, Guiyang 550081, China)

  • Xiaoyong Bai

    (State Key Laboratory of Environmental Geochemistry, Institute of Geochemistry, Chinese Academy of Sciences, Guiyang 550081, China
    CAS Center for Excellence in Quaternary Science and Global Change, Xi’an 710061, China)

  • Qiu Tan

    (School of Geography and Environmental Sciences, Guizhou Normal University, Guiyang 550025, China)

  • Yangbing Li

    (School of Geography and Environmental Sciences, Guizhou Normal University, Guiyang 550025, China)

  • Cuiwei Zhao

    (School of Geography and Environmental Sciences, Guizhou Normal University, Guiyang 550025, China)

  • Guangjie Luo

    (Guizhou Provincial Key Laboratory of Geographic State Monitoring of Watershed, Guizhou Education University, Guiyang 550018, China)

  • Luhua Wu

    (State Key Laboratory of Environmental Geochemistry, Institute of Geochemistry, Chinese Academy of Sciences, Guiyang 550081, China)

  • Fei Chen

    (State Key Laboratory of Environmental Geochemistry, Institute of Geochemistry, Chinese Academy of Sciences, Guiyang 550081, China
    College of Resources and Environmental Engineering, Guizhou University, Guiyang 550025, China)

  • Chaojun Li

    (State Key Laboratory of Environmental Geochemistry, Institute of Geochemistry, Chinese Academy of Sciences, Guiyang 550081, China)

  • Chen Ran

    (State Key Laboratory of Environmental Geochemistry, Institute of Geochemistry, Chinese Academy of Sciences, Guiyang 550081, China)

  • Huipeng Xi

    (State Key Laboratory of Environmental Geochemistry, Institute of Geochemistry, Chinese Academy of Sciences, Guiyang 550081, China)

  • Sirui Zhang

    (School of Geography and Environmental Sciences, Guizhou Normal University, Guiyang 550025, China
    State Key Laboratory of Environmental Geochemistry, Institute of Geochemistry, Chinese Academy of Sciences, Guiyang 550081, China)

  • Min Liu

    (School of Geography and Environmental Sciences, Guizhou Normal University, Guiyang 550025, China
    State Key Laboratory of Environmental Geochemistry, Institute of Geochemistry, Chinese Academy of Sciences, Guiyang 550081, China)

  • Lian Xiong

    (School of Geography and Environmental Sciences, Guizhou Normal University, Guiyang 550025, China
    State Key Laboratory of Environmental Geochemistry, Institute of Geochemistry, Chinese Academy of Sciences, Guiyang 550081, China)

  • Fengjiao Song

    (State Key Laboratory of Environmental Geochemistry, Institute of Geochemistry, Chinese Academy of Sciences, Guiyang 550081, China)

  • Chaochao Du

    (School of Geography and Environmental Sciences, Guizhou Normal University, Guiyang 550025, China
    State Key Laboratory of Environmental Geochemistry, Institute of Geochemistry, Chinese Academy of Sciences, Guiyang 550081, China)

Abstract

With climate change, Nitrogen deposition (ND) and carbon dioxide (CO 2 ) have increased significantly, but the effects of ND and CO 2 fertilization on carbon-use efficiency (CUE) and water-use efficiency (WUE) are still unclear. Therefore, the effects of ND and CO 2 on CUE and WUE are studied by means of trend analysis and partial derivatives. The results show the following: (1) From 2000 to 2020, the mean CUE in China was 0.533, and the WUE was 1.235 g C kg −1 H 2 O. (2) In the study area, a 53.8% CUE and 61.8% WUE showed an upward trend, and ND enhanced the positive contribution of CO 2 to CUE and WUE by 15.9% and 19.3%, respectively. (3) ND explained 48.1% and 56% of the increase in CUE and WUE, respectively, and CO 2 explained 45.8% and 50.1% of the increases in CUE and WUE, respectively. (4) The areas dominated by ND and CO 2 accounted for 43.9% and 12.7% of the total area, respectively, highlighting the importance of ND in the driving mechanism of CUE and WUE. The research results are helpful to further research in CUE and WUE.

Suggested Citation

  • Biqin Xiao & Xiaoyong Bai & Qiu Tan & Yangbing Li & Cuiwei Zhao & Guangjie Luo & Luhua Wu & Fei Chen & Chaojun Li & Chen Ran & Huipeng Xi & Sirui Zhang & Min Liu & Lian Xiong & Fengjiao Song & Chaocha, 2023. "Nitrogen Deposition Enhances the Positive Contribution of CO 2 Fertilization to China’s Carbon and Water Use Efficiencies," Land, MDPI, vol. 12(2), pages 1-18, February.
    • Handle: RePEc:gam:jlands:v:12:y:2023:i:2:p:413-:d:1057458
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    References listed on IDEAS

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    1. Zhu, Qiuan & Jiang, Hong & Peng, Changhui & Liu, Jinxun & Wei, Xiaohua & Fang, Xiuqin & Liu, Shirong & Zhou, Guomo & Yu, Shuquan, 2011. "Evaluating the effects of future climate change and elevated CO2 on the water use efficiency in terrestrial ecosystems of China," Ecological Modelling, Elsevier, vol. 222(14), pages 2414-2429.
    2. Trevor F. Keenan & David Y. Hollinger & Gil Bohrer & Danilo Dragoni & J. William Munger & Hans Peter Schmid & Andrew D. Richardson, 2013. "Increase in forest water-use efficiency as atmospheric carbon dioxide concentrations rise," Nature, Nature, vol. 499(7458), pages 324-327, July.
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