Distribution Characteristics of the Soil Fertility in a Slope Under Different Land Use

Through soil fertility determination,soil nutrient distribution characteristics under different land use were studied in Daijiagou small watershed of Changshou district of Chongqing. Results indicated that the sloping farmland organic matter and the total nutrient content in different slope position were much more lower than the forest land,but the fast-acting nutrient content in sloping farmland and orchard were higher than the stocked land,the weed land,the mulberry orchard and the forest land by far,Two kinds of land utilization structure type of the orchard-stocked land-forest land and the forest land-mulberry orchard-sloping farmland had more higher soil nutrient content;In the same slope position,the soil nutrient content was also different,TP content,although displayed certain difference in different slope position,but just had evident difference on the top and almost no difference on the middle and toe of the slope.The sloping farmland fast-acting K content were higher than the orchard and the forest land by far,the difference of fast-acting K content between orchard and the forest land is not obvious. There had remarkable relevance among soil alkaline hydrolysis N,effective P,the fast-acting K content and the slope position.