Study on water-holding function of main forest types in southeast of Guizhou province

The main forest types in southeast of Guizhou Province were selected to test their water conservation capacity.The results showed that the average interception rate of different forest types varied f rom 9.98 % to 28.46 %.The best forest type for the effect of canopy interception were Pinus massoniana plantation and broad-leaved mixed forest.The water retention characteristics in shrubs layer from the maximum to minimum was: broad-leaved mixed forest,Pinus massoniana plantation,deciduous broad-leaved forest,Cunninghamia lanceolata plantation,evergreen broad-leaved forest.while herbaceous layer in shrubs layer from the maximum to minimum was:Pinus massoniana plantation,evergreen broad-leaved forest,Cunninghamia lanceolata plantation,broad-leaved mixed forest,deciduous broad-leaved forest.and the water retention characteristics in litter layer:broad-leaved mixed forest Pinus massoniana plantation deciduous broad-leaved forest Cunninghamia lanceolata plantation evergreen broad-leaved forest.The soil bulk density of surface soil in deciduous broad-leaved forest was least(0.84g/cm3),and the Effect of soil bulk density for the Soil improvement in deciduous broad-leaved forest was obvious,surface soil static water storage capacity was the most large in main forest types in southeast of Guizhou Province.The ability of soil infiltration and dynamics of Soil water storage in broad-leaved mixed forest was much matter than other forest types in southeast of Guizhou Province.