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2008•ACTA AGRICULTURAE UNIVERSITATIS JIANGXIENSISRequires access

A Study on Soil Physical and Chemical Properties in the Process of Vegetation Succession in Karst Area in Central Guizhou

Binghui He

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Abstract

The process of natural succession of restoring vegetation in central Guizhou after rocky desertification in Karst area was divided into the herbosa stage,the stage of herbosa-shrub,the stage of vine-shrub,the stage of subaltern tree forest and the climax stage.Soil physical and chemical properties were studied by spatial method instead of time method.The results showed that,in the process of vegetation succession in Karst area in central Guizhou,the bulk density of soil decreased gradually,and the soil porosity rose steadily.The soil transformed from acid to alkali.The content of virtual nutritions,OM,total N and total P rose gradually in the process of succession,and the content of virtual N,virtual P,total N and total P reached the most in the stage of subaltern tree forest.But the total K decreased gradually in the whole process of succession.

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What this paper is about

The process of natural succession of restoring vegetation in central Guizhou after rocky desertification in Karst area was divided into the herbosa stage,the stage of herbosa-shrub,the stage of vine-shrub,the stage of subaltern tree forest and the climax stage.Soil physical and chemical properties were studied by spatial method instead of time method.The results showed that,in the process of vegetation succession in Karst area in central Guizhou,the bulk density of soil decreased gradually,and the soil porosity rose steadily.The soil transformed from acid to alkali.The content of virtual nutritions,OM,total N and total P rose gradually in the process of succession,and the content of virtual N,virtual P,total N and total P reached the most in the stage of subaltern tree forest.But the total K decreased gradually in the whole process of succession.

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Available abstract

The process of natural succession of restoring vegetation in central Guizhou after rocky desertification in Karst area was divided into the herbosa stage,the stage of herbosa-shrub,the stage of vine-shrub,the stage of subaltern tree forest and the climax stage.Soil physical and chemical properties were studied by spatial method instead of time method.The results showed that,in the process of vegetation succession in Karst area in central Guizhou,the bulk density of soil decreased gradually,and the soil porosity rose steadily.The soil transformed from acid to alkali.The content of virtual nutritions,OM,total N and total P rose gradually in the process of succession,and the content of virtual N,virtual P,total N and total P reached the most in the stage of subaltern tree forest.But the total K decreased gradually in the whole process of succession.

Key concepts: Ecological succession, Karst, Climax, Shrub, Vegetation (pathology), Stage (stratigraphy), Climax community, Environmental science

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