锌肥对不同基因型大麦吸收积累镉的影响

对土壤添加不同Zn、Cd条件下两种基因型(Sahara和Clipper)大麦对Zn、Cd的吸收积累研究表明，在本实验条件下土壤添加Zn、Cd对植物地上部生物量没有显著影响，但土壤添加Zn抑制植物根系生长，在土壤不缺Zn情况下添加Zn<20mg·kg^-1时并没有对大麦体内Cd浓度产生显著影响；当土壤Zn添加量达到40mg·kg^-1时，植物体内Cd浓度明显降低，植物吸收Cd的总量随着土壤添加Zn的增加而显著下降，这主要是由于根系生物量的下降所致，两个基因型大麦品种Zn效率存在显著差异，但这一差异对植物吸收Cd的总量没有影响，Zn高效品种Sahara根部Cd浓度显著低于Clipper。

Effect of zinc fertilization on cadmium uptake and accumulation in two barley (Hordeum vulgare) cultivars

A pot experiment was carried out in a greenhouse to investigate the interactive effects of Zn-Cd on the growth and the uptake of Cd and Zn by two barley genotypes (Sahara and Clipper). The results showed that under the conditions of this experiment, adding Cd and Zn had no significant effect on the shoot biomass of either cultivars, but applying Zn tended to reduce the root biomass of both cultivars. With the amount of less than 20 mg.kg-1, Zn addition did not affect Cd concentration in plant tissues; while at 40 mg.kg-1, it decrease Cd concentrations significantly in plant tissues of both cultivars. Total Cd uptake by both cultivars decreased with increasing in Zn application, mainly due to the decrease in root biomass. The two genotypes were significantly different in Zn uptake, but this difference did not affect Cd uptake. Cd concentration in roots of Zn-efficient cultivar Sahara was lower than that of Zn-inefficient cultivar Clipper.