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利用安徽省多目标区域地球化学调查获取的土壤全碳和有机碳数据,采用“单位土壤碳量”方法计算土壤碳储量以及土壤固碳潜力。结果显示,研究区表层(0~0.2 m)土壤固碳量潜力为237.48 Mt,其中土壤有机碳固碳量潜力为141.67 Mt,土壤无机碳固碳量潜力为95.81 Mt;中层(0~1.0 m)土壤固碳量潜力为1104.61 Mt,其中土壤有机碳固碳量潜力为469.32 Mt,无机碳固碳量潜力为635.28 Mt。与全国第二次土壤普查比较,近30年间区内表层土壤有机碳储量增加了7.07 Mt,本区表层土壤有机碳总体为“碳汇”区。碳汇区主要分布在江淮分水岭(六安—滁州一线)以北地区;碳源区则分布于淮河以北固镇县周围及淮河沿岸局部地区。此项工作为进一步探讨安徽省土壤固碳能力及土壤固碳减排潜力提供科学依据。
Based on the data of soil total carbon and organic carbon obtained from multi-target regional geochemical survey in Anhui Province, soil carbon storage and soil carbon sequestration potential were calculated using “unit soil carbon” method. The results showed that the potential of soil carbon sequestration in surface layer (0 ~ 0.2 m) was 237.48 Mt, in which the potential of soil organic carbon fixation was 141.67 Mt and the potential of carbon sequestration in soil was 95.81 Mt. The middle layer (0 ~ 1.0 m ) Had the potential of carbon sequestration in soil of 1104.61 Mt. The potential for carbon sequestration of soil organic carbon was 469.32 Mt and the potential for carbon sequestration of inorganic carbon was 635.28 Mt. Compared with the second national soil survey, the soil organic carbon storage in the area increased by 7.07 Mt in the past 30 years, and the total surface soil organic carbon in this area was in the “carbon sink” area. Carbon sinks are mainly distributed in the north of the JAC watershed (Lu’an-Chuzhou line); carbon source areas are distributed around the Guzhen County, north of the Huaihe River, and in some areas along the Huaihe River. This work will provide a scientific basis for further exploring soil carbon sequestration and soil carbon sequestration potential in Anhui Province.