Soil inorganic carbon stock under different soil types and land uses on the Loess Plateau region of China

文献类型： 外文期刊

第一作者： Tan, Wen-Feng

作者： Tan, Wen-Feng;Zhang, Rui;Cao, Hua;Huang, Chuan-Qin;Yang, Qin-Ke;Tan, Wen-Feng;Zhang, Rui;Cao, Hua;Huang, Chuan-Qin;Yang, Qin-Ke;Tan, Wen-Feng;Koopal, Luuk K.;Wang, Ming-Kuang;Koopal, Luuk K.

作者机构：

关键词： Soil;Carbonate;Inorganic carbon stock;Inorganic carbon density;Land use;Chinese Loess Plateau

期刊名称：CATENA （ 影响因子：5.198； 五年影响因子：5.594 ）

ISSN：

年卷期：

页码：

收录情况： SCI

摘要： The soil carbon reservoir is the largest carbon reservoir in terrestrial ecosystems and consists of soil organic and inorganic carbon stocks. Previous studies have mainly focused on the soil organic carbon (SOC) stock, and limited information is available about the soil inorganic carbon (SIC) stock. The Chinese Loess Plateau (CLP), which is located in the arid and semi-arid region of China, is an important inorganic carbon reservoir, with a thick soil layer that is rich in calcium carbonate. However, there are few reports on the SIC stock and its spatial distribution in this region. In the current study, the SIC densities and stocks for various soil types and land use patterns were evaluated based on 495 profiles with 2470 soil samples across the CLP, which were collected from the Chinese Second National Soil Survey. The results showed that in the top 1 m of soil across the CLP, the average SIC density is 17.04 kg/m(2), and the total SIC stock is approximately 10.20 Pg C (1 Pg = 10(15) g). The SIC stock of the CLP accounts for approximately 18.4% of the total SIC stock throughout China. The average values of the SIC stock in the 0-20, 20-50 and 50-100 cm depths of the CLP are 2.39, 2.92 and 4.89 Pg, respectively. Under different land use patterns, the order of the average SIC density is farmland approximate to grassland > forest in all soil layers. For the various soil types, the SIC density in the 0-100 cm layer is the highest in alkaline soil and lowest in subalpine meadow soil, whereas the SIC stock is highest in loessial soil, eolian sandy soil and sierozem, and the lowest in subalpine meadow soil. These differences are largely a result of the area occupied by each soil type and the climate conditions. The results of this study provide basic information about carbon reservoir in China and contribute to our understanding of the SIC stock on the CLP as it relates to the carbon balance of terrestrial ecosystems

分类号： S15

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