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首页»科研成果» 2017
石慧瑾、王秀君等在Plant and Soil上发表论文
全球院
Dynamics of soil organic and inorganic carbon in wheat-maize cropland of North China Plain H.J. Shi1, X.J. Wang1, Y.J. Zhao2, M.G. Xu3, D.W. Li1, Y. Guo1 1College of Global Change and Earth System Science, Beijing Normal University, Xinjiekouwai Street No.19, Haidian District, Beijing 100875, China 2College of Resource and Environment Science, Hebei Normal University, Shijiazhuang, Hebei 050024, China 3Ministry of Agriculture Key Laboratory of Crop Nutrition and Fertilization, Institute of Agricultural Resources and Regional Planning, Chinese Academy of Agricultural Sciences, Beijing 100081, China
Abstract Aims Soil inorganic carbon (SIC) and organic carbon (SOC) play an important role in the global carbon cycle. However, studying of SIC dynamics has been lacking. This study was aimed at evaluating the distribution of SIC and influencing factors in the wheat-maize cropland of North China Plain. Methods We measured contents of SOC, SIC, water-soluble Ca2+and Mg2+of 120 soil samples, and applied various analytical methods to evaluate the spatial distribution of SIC and its relationship with other key parameters. Results Mean SOC content decreased from 9.5 g C kg-1 in the 0-20 cm to 4.1g C kg-1 in 20-40 cm but SIC increased from 8.1 g C kg-1 (0-20 cm) to 12.1g C kg-1 (80-100 cm). Average SIC stock over 0-100 cm (16.5±4.7 kg C m-2) was more than twice of SOC stock (7.5±1.4 kg C m-2). In general, SIC stock was lower at the sites far away from the Yellow River. Conclusions Our analysis showed a significantly positive correlation between SIC and SOC (R=0.74, P<0.001).This study implies that SIC accumulation might be enhanced by the increase of SOC and highlights the importance of SIC in carbon sequestration in arid and semi-arid regions. Keywords: Cropland·North China Plain· Soil organic carbon· Soil inorganic carbon· Water-soluble Ca2+ and Mg2+ Published By: Plant and soil, online, DOI: 10.1007/s11104-017-3310-1 Source: https://link.springer.com/article/10.1007/s11104-017-3310-1 |
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