温州市土壤环境背景值分异规律研究

通过布点、采样和化验分析,研究了温州市东、中部地区约3 129 km2的滨海平原和丘陵地带以及乌岩岭自然保护区约25 km2的山地土壤环境背景值的分异规律。结果表明:pH、有机质、粒度等理化指标及重金属等元素和营养元素在温州市土类间有明显分异。所有元素背景值表现为从山地黄壤→红壤→水稻土→潮土→滨海盐土逐渐升高。同时这些元素存在土层纵向和土属之间的分异,而且在红壤土属中存在明显的迁移和累积特点。Pb、Ni、Cr、Hg、F在石英质砂岩、花岗岩和凝灰岩发育的红壤中明显累积,Zn、Cd、Mn明显迁移。

Research on the soil environment background value differentiation regularity of Wenzhou

The soil environment background values in the about 3 129 km~2 coastal plain and hilly zone of the eastern and central areas and about 25 km~2 hilly area of the Wuyanling Natural Reserve of Wenzhou City were studied through sampling,testing and analysis.The results showed that the differentiations of such physical and chemical indexes as pH,organic matter,graininess,heavy metals and nutrient elements are obvious between the soil groups,and all the background values of elements gradually rise in order of upland yellow soil,red soil,paddy soil,Chao soil and seashore saline soil.There are also differentiations for these elements between soil layers and soil genera. Besides,the background values of these elements obviously have mobile and cumulative features in the red soil genus.All the elements of Pb,Ni,Cr,Hg and F are obviously cumulative in the red soils developed by quartz sandstone,granite and tuff,and the elements of Zn,Cd and Mn are notably mobile in these soils.