摘要
To evaluate the zinc(Zn)remediation capacity of four alfalfa species,the effects of different concentrations of Zn on plant growth,Zn uptake and translocation as well as uptake of other nutrients were investigated.The results showed that the Zn tolerance index of Aohan was significantly higher than other species.Among the four species,Aohan had the highest concentration of Zn in roots,followed by Golden Empress,Sanditi and Longxi.Aohan had the highest bioconcentration factor(BCF)in leaves.Whereas,Sanditi and Longxi had the lowest BCF in stem and roots,respectively.The translocation factor of Golden Empress was significantly lower than other species.The Zn accumulation rate of Aohan was higher than other species regardless of the concentration of Zn.Longxi had the lowest allocation of Zn in leaves and Golden Empress had the lowest allocation of Zn in roots.The concentrations of other elements(Fe and Mg)in leaves were decreased with Zn additions,but the interactions between Zn and other elements in roots varied with species.These results indicated that suitable species of alfalfa could successfully be used for the phytoremediation of Zn-contaminated soils.
基金
Supported by Natural Science Foundation of Shannxi Province,China(15JK1121,2015JM3086)
the Open Fund of Cultivation State Key Laboratory of Qinba Biological Resources and Ecological Environment of Shaanxi University of Technology,China(SLGPT2019KF04-02)
Scientific research project of City-University co-construction of Shaanxi Province,China(SXJ-2101)
The Project of Foreign Experts Bureau of Shaanxi Province of China(G2021041011L,2022WGZJ-20,G20200241015)。
