highly significantP ≤ 0.01
5 (a), at low cadmium levels, there is a highly significant positive correlation between root cadmium content and root fresh weight ( P ≤ 0.01), as well as a significant positive correlation with A.G. part fresh weight ( P ≤ 0.05); stem cadmium content is highly positively correlated with TF root-stem ( P ≤ 0.01).