关键词: 山地土壤, 迎风坡(WS), 背风坡(LS), 坡向性分异

Abstract: Taking Mt. Erlang and Mt. Daxiangling in the western borders of the Sichuan basin for example, this paper discusses soil variation between windward slope(WS) and leeward slope(LS) in mountain and its significance on productivity and ecology. In WS, soil bio-accumulation which is marked by organic matter and nitrogen is bloom for rich rainwater and flourishing vegetation;Soil base leaching is intense, and soil acidification is obvious. However, in LS, soil bio-accumulation and base leaching are weak because rainwater sharply decreases; Soil even takes on calcification character in mountain base. The slope-direction variation of mountain soils and their environment lead to difference in land resource utilization and eco-environmental construction in different slope-directive. In WS, the upper altitude limit of cultivated land distribution is lower;paddy field is major in cultivated land, and mode of eco-environment construction is simpler. Whereas, in LS, the upper altitude limit of cultivated land distribution is higher;dry land is major in cultivated land, and the mode is relatively complex and difficult in eco-environment construction.

Key words: mountain soils, windward slope(WS), leeward slope(LS), slope-directive variation