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《Earth and Environment》 2013-01
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Research on Soil Heterogeneous Characteristics and Soil Conservative Model for Karst Dolomite Slope Land

HE Yong-bin1,ZHANG Xin-bao2,3,LI Hao4(1.School of Resource Environment and Earth Science,Yunnan Institute of Geography,Yunnan University, Kunming 650223,China;2.Institute of Mountain Hazards and Environment,Chinese Academy of Sciences, Chengdu 610041,China;3.State Key Laboratory of Environmental Geochemistry,Institute of Geochemistry, Chinese Academy of Sciences,Guiyang 550002,China;4.Resources and Environment College, Sichuan Agricultural University Chengdu 611130,China)  
On the karst dolomite slope with relatively low rock desertification,research was carried out with attempts to measure and analyze soil space heterogeneous characteristics such as soil -rock distribution and soil depth and soil particle structure in each slope sampling section including rock section,rock-soil section,soil-rock section and soil section.And consequently along with changes in slope length and slope position,the soil quantities in the sampling section tended to accumulate and increase as a result of slope soil erosion and sediment delivery.The variation index was reduced from 1.7 to 0.63.But the structure of soil particles bigger than 2mm increased from 13.66% to 23.48%,showing soil particles changed from coarser to coarser.In combination with the analysis of erosion environment and its elements,different soil conservative models have been proposed for karst dolomite slope land according to these slope land sections with different soil heterogeneous features.
【Fund】: 国家重点基础研究发展计划项目(2006CB403203);; 国家自然科学基金项目(40861016);; 云南省应用基础研究重点项目(2009CC003)资助
【CateGory Index】: S157.2
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