利川市农产品基地镉污染现状与评价

采用野外调查与室内分析的方法研究了利川市茶叶、水稻、黄连和蔬菜基地重金属镉的含量状况，以期为利川市农产品的安全生产提供科学依据。结果表明，利川市农产品基地的土壤存在镉含量超标，农田灌溉水的镉含量极低，所施肥料镉含量符合标准要求，但过磷酸钙等肥料的镉含量任不低，土壤镉含量高与长期大量施用磷肥有直接关系。部分农作物的镉含量也相对较高，同种作物镉的含量与产地土壤隔的含量呈正相关趋势，土壤镉含量偏高是导致部分农产品镉含量超标的主要原因。

Current Situations and Evaluation of Cadmium Pollution of Agriculture Production Bases in Lichuan

In this research, the current situation of the cadmium content in the agriculture bases of tea, rice, golden thread, and vegetables were studied, by field studies and indoor experiments, for providing scientific methods for security production of agricultural commodity in Lichuan. The results showed that the soil of agriculture bases in Lichuan had overdose cadmium. Although the irrigation water had lower cadmium content and the fertilizer was also up to standard, some of fertilizer, such as calcium superphosphate, still had higher cadmium content. That was the reason why the high cadmium content of soil was directly related to the overuse of phosphate fertilizer. In addition, it also indicated that the cadmium content of the same field crops and that of soil shared a positive correlation trend. Therefore, the main reason for high cadmium content in agricultural products resulted from the relatively high content cadmium in soil.