Modeling soil organic carbon change in croplands of China, 1980–2009
Modeling soil organic carbon change in croplands of China, 1980–2009
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DOI：
10.1016/j.gloplacha.2011.12.005
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发表时间：
2012-02
影响因子：
3.9
通讯作者：
Yongqiang Yu;Yao Huang;Wen Zhang
中科院分区：
文献类型：
--
作者：
Yongqiang Yu;Yao Huang;Wen Zhang
利用修正和验证的AGRO-C模型估算了中国农田土壤有机碳的近期时空变化。估计显示，从1980年到2009年，中国大约81%的农田中的SOC有所增加。中国东部、中部、南部和西南部地区的SOC上升幅度比全国其他地区更明显，而东北地区的黑龙江省中国SOC下降幅度较大。总体而言，我们估计，在此期间，中国的农田面积为1.3亿公顷，将730(329至1095)Tg C隔离在表层土壤中至30厘米深。大约73%的SOC封存发生在中国的东部、中部和南部。碳固存归因于作物产量的提高和作物残留物清除量的减少。然而，同期接受相对较低碳投入的富含有机碳的土壤在黑龙江省遭受了净碳损失。
Recent spatiotemporal soil organic carbon (SOC) changes in croplands of China were estimated by using a modified and validated Agro-C model. Estimates revealed that SOC in approximately 81% of China's croplands increased from 1980 to 2009. SOC increases in east, central, south, and southwest China were more significant than those in other regions of the country, while a decrease in SOC was pronounced in Heilongjiang Province in northeast China. Overall, we estimated that China's croplands covering an area of 130million hectare sequestered 730 (329 to 1095) Tg C in the topsoil to 30cm depth, during this period. Approximately 73% of the SOC sequestration occurred in east, central and south China. The carbon sequestration was attributed to the improvement of crop production and the decrease in the removal of crop residues. Soils rich in organic carbon that received relatively low carbon inputs during the same period, however, suffered net carbon losses in Heilongjiang Province.