Soil physiochemical properties for 7different landuse types were investigated in the typical karst rocky desertification area of Lingyun City

Guangxi Zhuang Autonomous Region.Results showed that different landuse systems had significant effects(p <0.01)on the bulk weight

water content

total porosity

capillary porosity and non-capillary porosity

as well as the organic matter

total N

P and K

effective N

P and K

and exchangeable Ca2+.Compared with the soil in broad-leaf forest

the degrees of soil degradation in shrub land

coniferous forest land

fallow terrace farmland

grassland

fallow sloping land and farmland became serious in turn.Among them

soil quality was he worst in farmland and it was in middle in coniferous forest land

grassland

fallow sloping land and fallow terrace farmland

while it was better in shrub land and broadleaf forest land.Human disturbances were the dominant factor affecting soil physiochemical properties. Hence

the degrees of soil degradation were changed with disturbance intensity.It is significant to control unreasonable disturbances and restore good vegetation for soil quality improvement in the region.