靖边县北部风沙区土壤微量元素含量及分布特征研究

在野外采样、室内分析与统计的基础上,对陕北靖边县北部风沙区土壤有效态微量元素的含量及分布进行了研究.结果表明,该地区土壤中B,Cu,Zn,Fe和Mn等微量元素有效态含量的平均值分别为:0.421mg/kg,0.505mg/kg,0.582mg/kg,7.092mg/kg和7.251mg/kg,它们的变幅分别在2.582～0.022mg/kg,1.194～0.158mg/kg,3.944～0.096mg/kg,26.08～2.4mg/kg和13.39～2.082mg/kg之间;在水平方向上,B,Cu,Zn和Mn的含量呈由南向北增高的趋势,Fe则表现出由西向东有所增加;土壤垂直剖面中,0~20cm的耕层B,Cu,Zn,Fe和Mn明显高于20~40cm和40~60cm土层的含量.

Study on the Characters of the Trace Metal Content and Distribution in Northern Sandy Area of Jingbian County

Based on the method of gathering soil sampling in field,room analysis and mathematic statistics,the content and distribution of available trace metals are analyzed in north of Jingbian Couny.The results indicate that the mean content of trace metal B,Cu,Zn,Fe and Mn are 0.421mg/kg,0.505mg/kg,0.582mg/kg,7.092mg/kg and 7.251mg/kg,the varivation is 2.582~0.022mg/kg,1.194~0.158mg/kg,3.944~0.096mg/kg,26.08~2.4mg/kg and 13.39~2.082mg/kg respectively.At the horizontal direction,the content of B,Cu,Zn and Mn show the increase tendency which from south to north,Fe displays opposite.In the soil vertical direction,the content of B,Cu,Zn,Fe and Mn in topsoil are obviously higher than that of 20~40cm and 40~60cm soil layer.