Abstract:

To explore the cadmium enrichment ability of different types of vegetables in alkaline soil with excessive cadmium content, and to screen out vegetable varieties with low cadmium accumulation, this experiment selected a total of fifteen common seasonal vegetable varieties, including four types of leafy vegetables, eight types of Solanaceous fruits, and three types of root and tuber vegetables. After the vegetables matured, edible parts were taken for testing and analysis.The experimental results showed that the cadmium content in three types of root and tuber vegetables did not exceed 0.1 mg·kg^-1; The cadmium content in four leafy vegetables exceeded 0.1 mg·kg^-1, with coriander having the highest cadmium content. The cadmium content in Solanaceous fruits was highest in the okra, followed by eggplant, and the cadmium content in the rest Solanaceous fruits was below 0.1 mg·kg^-1. From the perspective of enrichment coefficients, coriander and okra reached 60.02% and 13.69%, respectively, indicating a certain enrichment effect, while the enrichment effects of other vegetables were not significant. In alkaline soil with excessive cadmium content, pumpkin, cattail, and cucumber can be planted as options.

Key words: alkaline soil, vegetables, cadmium, enrichment ability