Carbon Sequestration via Agricultural-Crop Phytoliths in China
Song, Z., Wang, H., Strong, P.J. and Guo, F. 2014. Phytolith carbon sequestration in China's croplands. European Journal of Agronomy 53: 10-15.
In a new study of this phenomenon, Song et al. "constructed a silica-phytolith content transfer function and calculated the magnitude of the phytolith C sink within China's croplands," where "calculations were performed using relevant crop data such as land productivity, the Si-rich organ ratio, silica and PhytOC content, and the PhytOC stability factor."
The four researchers report the phytoliths sequestered in the croplands of China - which represent approximately 18% of the world's croplands - currently remove about 4.39 ± 1.56 Tg of CO2 per year from the atmosphere. Song et al. conclude their work by noting their data indicate "beneficial cropland management practices such as rational irrigation and fertilizer application, and crop pattern optimization may be taken to further enhance the phytolith C sink in croplands," to the extent that "global climate change could be partially offset by increasing cropland phytolith C sequestration at both a national and global scale."
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