以陕西省长武县为研究区，选取典型人工苹果林地和农业耕地土壤剖面，对土壤重金属元素的分布特征进行了分析，结果表明：不同土地利用方式下，土壤重金属元素含量的分布特征存在一定差异，土壤表层（0～20 cm）人工苹果林地重金属元素含量大于农业耕地，20～40 cm土层的重金属元素含量均相对较高，农业耕地的土壤重金属含量剖面变化曲线（尤其在60 cm土层以上）波动幅度比人工苹果林地明显；土地利用方式对不同深度土壤重金属元素含量的影响强度不同，其中对40～60 cm土层影响最大.

The distribution characteristics of heavy metals at different depth in the vertical soil section under two different land use patterns, that is, artificial apple wood land and agricultural land, were analyzed in Changwu county of Shaanxi province. The results indicated that the heavy metal contents in the topsoil of artificial apple woodland are higher than that of agricultural land, the contents of heavy metals are high in 20～40 cm, the fluctuation of agricultural soil section is more obvious than that of artificial soil section, especially in 0～60 cm. The effect intensity of land use pattern on heavy metal contents in different soil depths is different, with the greatest effect in the soil layer of 20～60 cm.