The Reseach On The Adaptability Of Five Ornamental Lianas To The Lead And Zinc Tailings

As the amount of tailings exhaust is increasing and it occupies the land and does harm to the surroundings, we now face the severe problem of how to deal with the proliferation of tailings pollution.The lianas are easy to live. They have developed roots, grow quickly and resistance is strong. They have wideapplication in slope phytoremediationand desertification management, but less application in tailings with heavy metal pollution. This essay explores the possibility of its application in the lead and zinc tailings management through pot plant experiment. Research is based on the five ornamental lianas:Lonicera Japonica、Parthenocissus quinquefolia、Ficus tikoua、 Euonymus fortunei、Campsis grandiflora. Pot experiments are carried on, using the lead and zinc tailings as matrix. The growth, physiological characteristics and heavy metals enrichment capability of the five ornamental lianas are tested to study the possibility of plant restoration of the five ornamental lianas under the circumstance of heavy metal pollution in the lead and zinc tailings. The results of the study are as follows:1. According to the general analyses of the five ornamental lianas, the growth of Campsis grandiflora, Lonicera Japonica, Euonymus fortunei, Ficus tikoua, Parthenocissus quinquefolia haave been limited to some extent.As the amount of lianas grows, the limitation of the liana’s growth has strengthened. The mean value of tolerance index is99.84,86.06,83.01,78.83,69.87respectively.lt shows Campsis grandiflora grows best in the lead and zinc tailings,follo wed by Lonicera Japonica, Euonymus fortunei, Ficus tikoua, Parthenocissus quinquefolia.2. As the amount of the lead and zinc tailings increases and the time prolongs, the amount of chlorophyll decreases,the amount of dissolve protein and SOD first increases and then decreases, and the amount of MDA increases gradually. According to analysis, it shows under the threat of heavy metal in the lead and zinc tailings, the contents of chlorophyll is over90%in the Campsis grandiflora, the inhibition of the dissolve protein and SOD is minimum and MDA increases only by14%. It shows Campsis grandifloraof adaptability is upper in the lead and zinc tailings, the performance of Parthenocissus quinquefolia is the worst, and the performance of Lonicera Japonica,Euonymus fortuneiand,Ficus tikoua is in the middle.3.Bioaccumulation factor of the heavy metals,Pb, Zn, Cu, Cd, Mn etc in the lead and zinc tailings of the five lianas is very small and only bioaccumulation factor of Cu of Campsis grandiflora is above1, that is,1.57.transfer factor of Campsis grandiflora’s Pb,Zn,Cu,Mn is maximum, and2.62,1.32,2.53,5.02respectively.transfer factor of Ficus tikoua’s Pb, Zn, Cu, Cd is above1, and transfer factor of Cd of Ficus tikoua is1.94.transfer factor of Cu of Lonicera Japonica is above1, that is2.36.transfer factor of Cd of Lonicera Japonica is above1, that is2when the amount of Parthenocissus quinquefolia in the lead and zinc tailings is low.Above all, the transfer ability of Campsis grandiflora and Ficus tikoua is strong and the bioaccumulation ability of the five lianas in the lead and zinc tailings is weak.Overall, Campsis grandiflora can be used as phytoremediation material in the lead and zinc tailings.