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[1]WANG Heng-song,XIONG Kang-ning,LIU Yuan.Freezing and Thawing Action on Soil Physical Characters in Karst Areas——With a Special Reference to Wangjiazhai and Yangchangdong Catchments of Qingzhen, Guizhou[J].Research of Soil and Water Conservation,2009,16(02):101-106.

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Freezing and Thawing Action on Soil Physical Characters in Karst Areas——With a Special Reference to Wangjiazhai and Yangchangdong Catchments of Qingzhen, Guizhou

Research of Soil and Water Conservation[ISSN 1005-3409/CN 61-1272/P] Volume: 16 Number of periods: 2009 02 Page number: 101-106 Column: Public date: 2009-04-20

Title:: Freezing and Thawing Action on Soil Physical Characters in Karst Areas——With a Special Reference to Wangjiazhai and Yangchangdong Catchments of Qingzhen, Guizhou

Author(s):: WANG Heng-song¹, XIONG Kang-ning¹, LIU Yuan¹; 1. Institute of South China Karst, Guizhou Normal University, Guiyang, 550001, China;
2. Guizhou Engineering Research Center for Integrative Rehabilitation of Karst Rock Desertification, Guiyang, 550001, China

Keywords:: freezing and thawing action; soil; physical character; karst mountain area

CLC:: S157;S152

DOI:: -

Abstract:: Soil layer is universal thin in mountain area and freezing makes the soil structure to change in spring and winter.Freezing and thawing action makes soil through a series of physical,chemical and biological changes.From the physical feature of land freezing caused,this study planned to probe into land freezing mechanisms and environmental effects to provide theory base for ecological resuming and prevention soil erosion in Karst mountain area.This paper was mainly on the results of soil physical properties.Five samples were selected and the impact of freezing and thawing action on soil physical characteristics were studied.The results showed as follows:the structural properties of freezing and thawing action were spoiled with lack of water stable aggregates(>0.25 mm) decrease to 2.66% and 4.78% respectively.The soil structure destroy rate,separate stabilization infiltrate,collapse rate and soil porosity,soil porosity and topsoil relax increase 2.64%,5.588%,11%,40.16%,3.43% respectively.Preliminary measures of preventing freezing were brought forward for the ecological vegetation restoration in karst mountain area.Loose surface soil,soil anti-erosion and reduced soil erosion prone to speed up.

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