Classification Studies On Soil-vegetation System Of Dolomite Area In Guizhou Province

Siol-vegetation system is a syntheses in their course of evolution, they have osculating connection and reciprocity,if one of them is changed one will have same result in another.It has very importment means of theoretical practical and societal means to the study of status quo and mechanism of soil regression of dolomite area in Guizhou, appraisement of land latent productive capacity,It is a very important basic theory problem to study classification on soil-vegetation system of dolomite area in Guizhou province, and it offers important basic theory for ecology restoration and rebuild, land development and land use in dolomite area, restoration of regressive ecology systemBased on the principle of soil genesis and oneness and character of vegetation community, environment and developments to classfy soil-vegetation system of dolomite area in Guizhou province, use the method of detrended canonical correspondence analysis (DCCA), detrended correspondence analysis (DCA), Use the method of DCCA to mark off departments and get three of them ,field vegetation be discussed as single one .Because DCA is better than DCCA and CCA in the reflection of vegetation community ,use the method of DCA to mark off system type group on the base of marked off the other three model groupsⅠ,Ⅱ,Ⅲ.On the base of DCA use the method of DCCA to mark off system group and reflect the relationship between environmental factors and vegetation.Analysis system groups and remote sensing images and vector images use the method of superimposition analysis,combine with fieldwork files to mark off system series.Classfy soil-vegetation system of dolomite area in Guizhou province, the result as follows:(1) Four departments have been marked off:ⅠFerrallitic vegetation,ⅡLuvisol vegetation,ⅢPrimitive soil vegetation,ⅣField vegetation.Four units:system type group --- system type ----system group -----system series.(2) Siol-vegetation systemⅠFerrallitic vegetation, distributing is abordly,in most places of Guizhou,the main type groups of SVS are ferrallitic—conifer ,ferrallitic—shrubbery,ferrallitic—shrub grassland .The main types of SVS are red soil—conifer,yellow soil-- conifer, red soil—shrubbery,yellow soil-- shrubbery,red soil—shrub grassland,yellow soil-- shrub grassland,the area of shrub grassland and shrubbery is a little larger.ⅡLuvisol vegetation,the distributing is quite a few,but not abroadly,the north and central of Guizhou is abundance,southwest is not very much.The main type groups of SVS are luvisol—conifer, luvisol—shrubbery,luvisol—shrub grassland .The main types of SVS are brown siol—conifer , brown siol—shrubbery , brown siol—shrub grassland,the area of shrubbery and shrub grassland is a little larger.ⅢPrimitive soil vegetation, the distributing is in most areas of Guizhou,but in the west and westsouth is a little larger. The main type groups of SVS are primitive soil-- conifer, primitive soil-- shrubbery, primitive soil-- shrub grassland.The main types of SVS are lime soil-- conifer, lime soil—shrubbery.The area of confer is alittle simall and shrubbery is larger.ⅣField vegetation, it includes ferrallitic--field vegetation, luvisol-- Field vegetation, primitive soil-- Field vegetation. Dry land crop and paddy field crop are main vegetation type, the main crop combine are ripe once a year and ripe twice a year.