Abstract
The absorption and immigration of Cr and Cu in the mulberry seedlings were investigated by using the hydroponic solution that Cu coexisted with Cr. The two-factor design experiments were carried out in the total 25 addition-areas, namely, 5 addition-areas with 5-level concentrations of Cr (0, 0.5, 2.0, 4.0 and 8.0 mgl-1 ) based on the normal hydropoic solution, and corresponding to each area of Cr addition, 5-level concentrations of Cu (0, 1.0, 3.0, 6.0, 12.0 mgl-1 ) were designed. It was observed that, at low concentration of Cu, the concentration and amounts of Cr and Cu in the mulberry seedlings were low with the same level, probably due to the competitive effect. Such absorption of Cr and Cu indicated that their absorption was attributed to antagonistic phenomenon. However, when both Cr and Cu were of the high concentrations, the toxicity of Cr and Cu were added, and the concentrations of Cr and Cu in the roots were much higher than those of solely adding Cu due to the deterioration of the exclusive function of roots.
