耕地土壤重金属环境质量适宜性评价

将耕地土壤重金属环境质量适宜性评价分为现状评价和预测性评价，前者通过耕地所种植作物的产量、质量状况来反映，后者则以类比法进行。以重金属污染耕地作物产量减产不超过10％，产品质量符合国家食品卫生标准为依据，确定该区域土壤重金属环境质量现状对该种植作物的适宜性；在现状评价基础上，除土壤重金属污染之外的同等条件区域，类比耕地土壤重金属含量，预测该区域耕地土壤重金属环境质量对该作物的适宜性。与其它方法相比，本文提出的耕地土壤重金属环境质量适宜性评价，综合考虑到我国土壤、气候、作物类型及栽培技术等因素，评价结果更为直观。

Environmental quality suitability evaluation of heavy metal polluted cropland soils

This paper will divide the environmental suitability evaluation of heavy metal polluted cropland soils into status evaluation and predictive evaluation. The former is based on the yield and quality of crops on the cropland, where the environmental suitability is determined by the index that crops' yields on heavy metal polluted cropland drop by less than 10% and crops' quality complies with national food health standards. And the latter is carried out through analogy method, where, on the basis of status evaluation, we compare the heavy metal contents in the croplands with similar conditions excluding the status of heavy metal pollution to predict the environmental suitability of the croplands. Compared with other methods, the suitability evaluation proposed in this paper takes factors into consideration such as soil condition, climate, crop types and cultivation technique in China, thus the result of evaluation will be more visual.