Spatial Variability of Soil Organic Carbon and Related Factors in Jiangsu Province,China

作     者：CHUAI Xiao-Wei HUANG Xian-Jin WANG Wan-Jing ZHANG Mei LAI Li LIAO Qi-Lin 

作者机构：School of Geographic&Oceanographic SciencesNanjing UniversityNanjing 210093(China) Land Development and Consolidation Technology Engineering Center of Jiangsu ProvinceNanjing 210093(China) Department of Urban and Resource SciencesJinling CollegeNanjing UniversityNanjing 210093(China) jiangsu information CenterNanjing 210013(China) Geological Survey of Jiangsu ProvinceNanjing 210018(China) 

出 版 物：《Pedosphere》 (土壤圈（英文版）)

年 卷 期：2012年第22卷第3期

页      面：404-414页

核心收录：

学科分类：09[农学] 0903[农学-农业资源与环境] 090301[农学-土壤学] 

基　　金：Supported by the National Social Science Foundation of China (Nos. 10ZD & M030) the Non-Profit Industry Financial Program of the Ministry of Land and Resources of China (No. 200811033) the Foundation of Philosophy and Social Sciences Research of Jiangsu Higher Education Institutions,China (No. 2010ZDAXM008) the Project Funded by the Priority Academic Program Development of Jiangsu Higher Education Institutions,China 

主　　题：industrial and human activities land cover land use soil type topography 

摘      要：Soil organic carbon (SOC) plays a key role in the global carbon *** this study,we used statistical and geostatistical methods to characterize and compare the spatial heterogeneity of SOC in soils of Jiangsu Province,China,and investigate the factors that influence it,such as topography,soil type,and land *** study was based on 24 186 soil samples obtained from the surface soil layer (0-0.2 m) and covering the entire area of the *** values of SOC density in the surface layer,obtained by kriging based on a spherical model,ranged between 3.25 and 32.43 kg m *** highest SOC densities tended to occur in the Taihu Plain,Lixia River Plain,along the Yangtze River,and in high-elevation hilly areas such as those in northern and southwest Jiangsu,while the lowest values were found in the coastal ***,slope,soil type,and land use type significantly affected SOC *** slope tended to result in SOC *** between elevation and SOC densities was positive in the hill areas but negative in the low plain areas,probably due to the effect of different land cover types,temperature,and soil *** SOC densities were usually found in limestone and paddy soils and low densities in coastal saline soils and alluvial soils,indicating that high clay and silt contents in the soils could lead to an increase,and high sand content to a decrease in the accumulation of *** densities were sensitive to land use and usually increased in towns,woodland,paddy land,and shallow water areas,which were strongly affected by industrial and human activities,covered with highly productive vegetation,or subject to long-term use of organic fertilizers or flooding conditions.