Advances in Earth Science ›› 2018, Vol. 33 ›› Issue (2): 206-212. doi: 10.11867/j.issn.1001-8166.2018.02.0206

Special Issue: 青藏高原研究——青藏科考虚拟专刊

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Study on the Soil Carbon Pool and Potential Capacity of Carbon Sequestration in the Northern Tibetan Plateau

Yafeng Zhang 1( ), Zhen Yao 1, 2, Qiang Ma 1, 2, Bingyan Ji 1, Guowen Miao 1, Guang Xu 1, Fengjuan Ma 1, 2   

  1. 1.Fifth Institute of Geological and Mineral Exploration of Qinghai Provincial Bureau of Geology and Mineral Resources,Xining 810099, China
    2.Earth Science Institute, Jilin University, Changchun 130012,China
  • Received:2017-07-18 Revised:2017-12-15 Online:2018-02-20 Published:2018-04-02
  • About author:

    First author:Zhang Yafeng(1986-),female, Jiaocheng County, Shanxi Province, Engineer. Research areas include agricultural geochemical and ecological environment.E-mail:371221815@qq.com

  • Supported by:
    Project supported by the Second Batch of “High-end and innovative talents thousand people project” of Qinghai Province No.Qing talent word [2017] No.5);Industry Foundation of Ministry of Land and Resources “The studies on soil carbon stocks and the carbon sequestration potential of major agricultural in China—Experimental study on organic carbon storage and sequestration mechanism of soils of Chestnut soil”(No.200911020-13)

Yafeng Zhang, Zhen Yao, Qiang Ma, Bingyan Ji, Guowen Miao, Guang Xu, Fengjuan Ma. Study on the Soil Carbon Pool and Potential Capacity of Carbon Sequestration in the Northern Tibetan Plateau[J]. Advances in Earth Science, 2018, 33(2): 206-212.

It is important to investigate the soil organic carbon reserves of the northern Tibetan Plateau for understanding the global carbon cycle. The surface soil carbon storage is 1.27×108 t, and the surface topsoil organic carbon density is 4.96×103 t/km2 in the study area. Compared with the results of the second National Soil Census, the distribution of organic carbon reserves of chestnut soil, sierozem, alpine steppe soil, swamp soil, sandy soil and ustic cambisols increased gradually, which are mainly distributed in savanes of the northern Qinghai Lake and woodland in middle-high mountain areas of the eastern Qinghai Lake; savanes and woodland are classified as the carbon sink area because this area’s carbon sequestration is greater than the release quantity. By contrast, the distribution of organic carbon reserves of mountain meadow soil, alpine meadow soil, grey cinnamon soil, chernozem and anthropogenic-alluvial soil decreased gradually, which are mainly distributed in the farming areas of eastern Qinghai Province. This area’s carbon sequestration is less than the release quantity because of cultivation effect, and is classified as the carbon source area. The 97.5% of organic carbon storage cumulative frequency is closed to the threshold value of the organic carbon saturation. The carbon sequestration potential of the study area is 241.57×106 t. Take the widely distributed chestnut soil as a case, it will take 18.66 years to reach saturation for the soil organic carbon reserves of chestnut soil.

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