摘要： 采用盆栽试验方法,研究了4种不同积累镉能力白菜吸收累积镉的特征。分别对4种不同积累Cd能力白菜地上部Cd含量与土壤全Cd含量之间的关系分别用数学模型进行模拟,发现二者均分别符合线性或二次曲线模型。结果表明,4种不同积累Cd能力的白菜地上部Cd含量与土壤全Cd含量之间的相关性均达到显著水平。白菜为叶菜类蔬菜,按GB2762-2005规定的叶菜类蔬菜中Cd最高允许限量标准,由拟合方程可以推算出,白菜地上部Cd含量为0.2 mg/kg时,种植白菜新北京3号、北京小杂60、多抗3号和早心白所允许的最大土壤Cd含量分别为1.74,2.25,0.603和0.842 mg/kg。可见土壤Cd含量低于1.0 mg/kg是安全生产白菜的重要控制指标。

关键词: 白菜, 镉, 吸收, 累积, 特征

Abstract: The soil culture experiments were performed to study the difference of Cadmium uptake and accumulation among 4 different Chinese cabbages cultivars.The relationship between shoot Cd concentration of four Chinese cabbages cultivars and soil Cd concentration could be simulated by mathematic model.Positive linear correlation and quadratic curve were found between both.Test results suggested that correlation of both relationship attained significant level.According to the provisions of leafy vegetables the maximum allowable limit of Cd standard of 0.2 mg/kg in the GB2762-2005,maximum soil Cd concentration for Xinbeijing3 hao,Beijingxiaoza 60,Duokang 3 hao and Zaoxinbai were 1.74,2.25,0.603 and 0.842 mg/kg significantly.The soil Cd concentration of 1.0 mg/kg were the important control indicator for the vegetable food security.

Key words: Chinese cabbage, Cadmium, Uptake, Accumulation, Characteristic

中图分类号: 

• S143