【摘要】 陕西境内地貌类型多样,气候分异明显,土壤分布规律性强,是我国自然条件复杂的省份之一。全省自北向南明显分为三大自然经济区域,主要粮食作物有小麦、稻米、玉米和谷子。经过调查,共采集各类样品366个,对铬、砷、汞、铅、铜、锌、镉和镍等8种元素进行了测定,确定了各元素在各类粮食作物中不同区域和土类上的环境背景值,并探讨了各元素背景值的自然分布特征及相关性。更多还原

【Abstract】 Shaanxi province where there ane various kinds of landforms, very distinct different climate patterns and strong regulations of soil distribution is one of the provinces with very complicated natural conditions in China. From the north to the south, the whole province can be divided into three natural economic zones. The main crops are wheat,rice,corn and millet. In the investigation,366 samples were collected to measure the concentrations of Cr,As Hg,Pb,Cu,Zn,Cd and Ni of 8 elements thereby to determine the environmental background values of each element in grain crops in different soils of different areas. Also,this paper discusses the natural distribution features of correlations of background values of each element.更多还原