Abstract
Based on the data from China’s second national soil survey and field observations in northwest China, we estimated soil organic carbon (SOC) storage in China and investigated its spatial and vertical distribution. China’s SOC storage in a depth of 1 meter was estimated as 69.1 Pg (1015 g), with an average density of 7.8 kg m−2. About 48% of the storage was concentrated in the top 30 cm. The SOC density decreased from the southeast to the northwest, and increased from arid to semi-humid zone in northern China and from tropical to cold-temperate zone in the eastern part of the country. The vertical distribution of SOC differed in various climatic zones and biomes; SOC distributed deeper in arid climate and water-limited biomes than in humid climate. An analysis of general linear model suggested that climate, vegetation, and soil texture significantly influenced spatial pattern of SOC, explaining 78.2% of the total variance, and that climate and vegetation interpreted 78.9% of the total variance in the vertical SOC distribution.
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Acknowledgements
We thank Biao Zhu for editing the earlier draft of this manuscript. This study was supported by the National Natural Science Foundation of China (40024101, 40228001, and 90211016) and Peking University (211 and 985 programs).
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Yang, Y., Mohammat, A., Feng, J. et al. Storage, patterns and environmental controls of soil organic carbon in China. Biogeochemistry 84, 131–141 (2007). https://doi.org/10.1007/s10533-007-9109-z
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DOI: https://doi.org/10.1007/s10533-007-9109-z