关键词: 镉, 龙眼, 吸收, 分布, 耐性

Abstract: The experiment was carried out using pot-cultured three-year-old longan trees to determine the variation of cadmium (Cd) content and growth of longan plant after Cd applied to soil.The results showed that more of the absorbed Cd assembled in the roots and less transferred to the leaves and fruits.The order of Cd content from high to low in different parts of longan was root, leaves and fruit.Longan tree had strong tolerance to Cd stress.When applied Cd 400 mg/kg to soil, there was no significant toxic symptom on the plant, but the content of Cd in fruit was seriously excessive.

Key words: cadmium, longan, absorption, distribution, tolerance