Vanadium uptake by alfalfa grown in V-Cd-contaminated soil by pot experiment.

In order to characterize uptake of vanadium in alfalfa grown in vanadium-cadmium (Cd)-contaminated soil, 104 soil samples and 94 plant samples were collected from pot experiment. The results showed alfalfa had strong metal adaptability (up to 400 mg kg(-1)) and high accumulation (up to 3,440.14 mg kg(-1)) of vanadium. Root had higher contents and better absorption to vanadium than overground part. Moreover, both root and overground part had direct correlation with vanadium in soil, especially with the sum of first three fractions and reducible fraction. With the increasing of vanadium, higher concentration of Cd may inhibit the absorption of vanadium in alfalfa.