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土壤风蚀是引起干旱半干旱地区土地退化的主要因素,风蚀强度取决于土壤分布区的自然环境及土壤本身的性质,随着人类活动强度的加大,土地利用、土地覆被及其所引起的土壤表层水分变化成为影响土壤风蚀的主要因素。本文利用2 0 0 2年36月期间在河北坝上丰宁县野外试验并观测到的不同土地利用方式下土壤湿度及风蚀量数据,通过定量分析,比较不同土地利用方式及其土壤含水量对风蚀的影响。结果表明,土壤风蚀的强弱主要取决于土地利用方式及土壤表层含水量。草地和林地在抗风蚀方面要强于耕地,土壤表层含水量对风蚀的影响突出地表现在耕地中,据此,人类可通过改变土地利用方式,其次是在春季增加土壤表层湿度,二者结合才能有效减缓该区域内的土壤风蚀强度
Wind erosion is the main factor causing the land degradation in arid and semi-arid areas. The wind erosion intensity depends on the natural environment of the soil distribution area and the nature of the soil itself. With the intensification of human activities, the land use, land cover and its causes Soil surface moisture changes become the main factors affecting soil erosion. In this paper, the data of soil moisture and wind erosion under different land use patterns tested and observed in Fengning County of Hebei Province in March 2002 were used to quantitatively analyze the effects of different land use types and soil moisture on wind erosion Impact. The results show that the intensity of soil erosion mainly depends on the land use pattern and soil surface water content. Grassland and woodland are stronger than arable land in wind erosion resistance. The effect of surface water content on wind erosion is prominent in cultivated land. Therefore, mankind can effectively increase soil surface humidity by changing land use patterns, followed by increasing soil surface humidity in spring. Reduce soil erosion intensity in this area