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土壤有机碳库作为陆地生态系统中重要的碳库之一,对于温室效应和全球变化研究具有重要意义.利用浙江省1:5万土壤数据库,对浙江省277个土种0～100cm土层的有机碳密度进行估算,分析了全省土壤有机碳密度和储量,以及各主要土壤类型有机碳密度和分布.结果表明:浙江省土壤有机碳密度值主要集中在5～10kg·m-2;山香灰土有机碳密度最高,为52.80kg·m-2,清水砂最低,为1.82kg·m-2;红壤和水稻土土类土壤有机碳储量最大,两者之和占浙江省土壤有机碳总储量的63.8%;浙江省土壤总面积为100784.19km2,土壤有机碳储量为875.42×106t,土壤有机碳平均密度为8.69kg·m-2.通过叠加数字高程模型分析,发现土壤有机碳密度随高程、坡度和坡向的变化均呈现明显的变化趋势.
As one of the important carbon pools in terrestrial ecosystems, soil organic carbon pool is of great significance for the study of greenhouse effect and global change.Using the 1: 50000 soil database in Zhejiang Province, the soil organic carbon pool of 0-100 cm soil layer of 277 soil types in Zhejiang Province Organic carbon density was estimated, and the province’s soil organic carbon density and reserves, as well as the organic carbon density and distribution of the major soil types were analyzed. The results showed that the soil organic carbon density in Zhejiang Province mainly concentrated in 5 ~ 10kg · m-2; The highest density of organic carbon in soils was 52.80kg · m-2, while the lowest in clear water was 1.82kg · m-2. The total organic carbon storage in red soils and paddy soils was the highest. , 63.8% of the total soil organic carbon in Zhejiang Province, total soil area of 100784.19km2, soil organic carbon storage of 875.42 × 106t, and average soil organic carbon density of 8.69kg · m-2. Through the analysis of superimposed digital elevation model, The changes of slope and aspect show obvious trend.