土壤环境生态对重金属元素迁移影响分析

作物中重金属元素主要来自土壤，其含量与作物种类和土壤环境有关。土壤中重金属元素含量、土壤pH值、Eh值、土壤化学组成、土壤质地等环境因素都影响作物中重金属元素含量。土壤pH值和Eh值影响重金属元素的活动性。重金属元素的水溶态容易被作物吸收，而难溶态和被土壤胶体固定的重金属元素，不能被作物吸收。同种作物重金属元素含量的差异主要取决于土壤环境。

The Effect of Soil Environment on the Content of Microelements in Crops

The content of microelements in crops are relevant to the species of the crops and the soil environment. The content of microelements in crops are affected by the content of microelements in soil, pH value and Eh value of the soil, chemical composition of the soil and soil texture, etc. The reactivity of microelements bases on the pH value and Eh value of the soil. The more water- soluble elements contained in soil, the more elements absorbed by the crops. On the contrary, elements which are water- insoluble or those adsowed and fixed by soil colloid are less easily absorbed by crops.