山东省成武县土壤地球化学特征及土地质量现状

山东省成武县农业地质环境土壤地球化学调查是按浅层、深层土壤样品1点/4km2。测试N,P,K,Cu,Zn,B,Mo,Mn,F,As,Hg,Pb,Cr,Cd等14种指标。在统计这些指标的表层、深层土壤地球化学特征参数的基础上,对其与世界、全省同类参数的差异进行了分析,并分析了区内表层、深层土壤元素含量的相关性,认为该区表层土壤元素含量的显著特征是高F,Hg,Pb而低Mo;大部分元素在表层土壤中的含量继承了土壤母质的成分特征,但N,F,Hg,Pb等受人为活动和污染源的作用在表层土壤中明显富集。通过分析表层土壤营养元素有效量可知,P,K,Zn的有效量高;供肥能力强;而Mo,Cu,Mn明显偏低。利用易污染元素浅层土壤含量值,通过污染指数法,对全区土壤污染程度进行了评价;区内土壤无严重污染区存在,并且明显污染地段面积较小,呈零星分布,说明区内污染程度较轻。

Geochemical Characteristics of Soil and Present Condition of Land Quality in Chengwu County of Shandong Province

Geochemical investigation of soil and agricultural geological environment in Chengwu county of Shandong province has been carried out according to shallow and deep soil sample with one point per 4km2. 14 kinds of indexes have been tested, such as N, P, K, Cu, Zn, B, Mo, Mn, F, As, Hg, Pb, Cr, Cd. On the basis of counting soil geochemical parameters in shallow and deep layers, the differences of same kind parameters in Shandong province and the world have been analyzed, and relationship of element contents in shallow and deep soils in this area have been analyzed as well. It is considered that significant characteristics of element contents in shallow soil in this area has high value in F, Hg and and low value in Mo. The contents of most elements in shallow soil inherited the ingredient characterisics from soil parent material, but the elements like N, F, Hg, and Pb are obviously enriched on topsoil because of human activities and polluting resources. On the basis of analyzing effective quality of nutrient element in shallow soil, it is known that the effective quality of P, K, and Zn is high with a strong feeder capacity, while effective quality of Mo, Cu and Mn is obviously low. Through analyzing content value of easily polluted element in shallow soil, by using pollution index method, the soil pollution degree in the whole area has been evaluated. There is no severe polluted area in this area, and the obvious polluted area is rather small and distributed sporadically. It is indicated that pollution degree in the area is small.