利用1:5万土壤数据库估算浙江省土壤有机碳密度及储量  

Estimation of soil organic carbon density and storage in Zhejiang Province of East China by using 1:50000 soil database

作　　者：支俊俊[1] 荆长伟[1] 张操[1] 吴嘉平[1] 倪治华 陈红金 徐进 

机构地区：[1]浙江大学环境与资源学院,杭州310058 [2]浙江省土肥站,杭州310009

出　　处：《应用生态学报》2013年第3期683-689,共7页Chinese Journal of Applied Ecology

基　　金：浙江省科技厅重点项目(2006C22026)资助

摘　　要：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 an important component of the carbon pool of terrestrial ecosystem, soil carbon pool plays a key role in the studies of greenhouse effect and global change. By using a 1：50000 soil da- tabase, the organic carbon density in the 0-100 cm layer of 277 soil species in Zhejiang Province was estimated, and the soil organic carbon （SOC） density and storage in the whole Province as well as the spatial distribution of the SOC density and storage in the main soil types of the Province were analyzed. In the whole Province, the SOC density ranged from 5 kg . m-2 to 10 kg . m-2. Among the main soil types in the Province, humic mountain yellow soil had the highest SOC density （52. 80 kg . m-2 ）, whereas fluvio-sand ridge soil had the lowest one （ 1.82 kg . m-2 ）. Red soil and paddy soil had the largest SOC storages, with the sum accounting for 63.8% of the total SOC storage in the Province. The total area of the soils in the Province was 100784.19 km2, the esti- mated SOC storage was 875.42 × 106 t, and the kg . m-2. The analysis with the superposition digital presented an obvious variation trend with the changes estimated SOC density was averagely 8.69 elevation model showed that the SOC density of elevation, slope gradient, and aspect.

关 键 词：有机碳密度 有机碳储量 大比例尺 土壤数据库 浙江 

分 类 号：S153.6[农业科学—土壤学]