关键词: 蔬菜, 轻度Cd污染, 富集运移, 食用安全性

Abstract: In order to provide theoretical basis and production guidance for screening and cultivating edible safe vegetable types with low accumulation and low displacement of heavy metal cadmium, capacity of cadmium accumulation, migration and edible safety analysis of 10 varieties of three kinds of vegetables such as cabbage, garlic and radish were studied using mild cadmium contaminated field as vegetable soil environment. The results showed that different types of vegetables had different ability of accumulation and migration of heavy metal cadmium. In general, the accumulation capacity of cadmium in the edible parts of three categories vegetables was sorted from big to smallcabbage, radish and garlic,but the sequence of the cadmium migration capacity from the roots to the above ground part of plants in three categories vegetables was sorted from big to smallradish, cabbage and garlic. In the edible parts of vegetables tested, cadmium content of both purple garlic and white garlic are lower than limit of pollutants of national food safety standards（0.1 mg/kg）, and their pollution index are within the warning limit. However, the other 8 varieties were contaminated to some degree by Cd. For instance, Chinese cabbage with high stalk, carrots covered with red color and green turnip are moderately polluted, and the rest are slightly polluted.

Key words: vegetables, mild cadmium pollution, accumulation and migration, edible safety