| In order to investigate the profile distribution characteristics of soil nutrients under different land use types in the karst areas, the impact of different land use types including orchard land, grassland, vegetable land, shrub land and
farmland on soil nutrient distribution was analyzed. The results showed: (1) Soil organic matter(OM), available phosphorus
(P), available kalium(K) were significantly affected by land use types, while total nitrogen(TN), available nitrogen(N), total phosphorus(TP), total kalium (TK) were not significantly affected by land use types. The order of content of OM in different land use types was grassland>vegetable land>orchard land>shrub land>farmland, the order of content of P in different land use types was shrub land>grassland>farmland>orchard land>vegetable land, the order of content of K in different land use types was orchard land>grassland>vegetable land>farmland>shrub land; (2)OM, N, TP, TK, K content had the character of surface accumnulation in some extent; (3)There existed significant relationship between most nutrients in soil and various oil granule contents and soil sand, had the best relationship with soil nutrients. |
