In the present study, geo-statistic method and GIS were combined to reveal the temporal and spatial variation characteristics of soil organic carbon (SOC) in 0-20 cm soil layer.It was shown that the mean SOC in Fuyang District was 17.3 g·kg-1 in 1979 and 18.5 g·kg-1 in 2006.Geo-statistical analysis indicated that SOC had a moderate spatial correlation.Different land use types had significantly influence on soil fertility levels.SOC content of different land use types decreased as vegetable land>forest land>paddy field>dry land>unused land>orchard.The main driving force of SOC variation in the study area was the management measures of different land use types.The treatment of wastewater, wastes, and use of manure and chemical fertilizers directly influenced SOC content in soil.These results could provide references for SOC management.%将地统计学和地理信息系统相结合,研究浙江省杭州市富阳区1979-2006年0~20 cm土层土壤有机碳的时间和空间变异特征.结果表明,1979-2006年富阳区土壤平均有机碳含量从17.3 g·kg-1增长到18.5 g·kg-1.根据半方差模型分析结果,富阳区1979年和2006年土壤有机碳的分布在空间自相关上均表现为中等强度.不同土地利用类型土壤有机碳含量依次为菜地>林地>水田>旱地>未利用地>园地.研究区内土壤有机碳发生变化的主要驱动力是土地利用方式及其相应的管理措施差异.城镇日常生活产生的生活废水与废弃物,以及工业特别是造纸产生的工业废水的处置方式,农业生产中不同种植方式下有机肥和化肥的使用情况,均对研究区土壤有机碳水平的高低和空间异质性有直接影响.研究结果可为研究区土壤有机碳管理提供科学依据.
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