Effects Of Heavy Metals Pollution On Growth And Physiological-Biochemical Characteristics Of Eulaliopsis Binata

In this dissertation, effects of single and compound of heavy metals on the fresh weights, contents of chlorophyll, activities of SOD, POD, CAT of Eulaliopsis binata grew on the soil polluted by single or compound of heavy metals, and effects of different modifiers on growth and physiological-biochemical of Eulaliopsis binata grew on the soil polluted by lead/zinc mine tailings, and the characteristic of using Eulaliopsis binata to accumulate heavy metals were studied with a pot experiment. The main results were as follows:Under the different concentrations of Cd, Pb, Cu, Zn and As single pollution, the resistance of Eulaliopsis binata's root to heavy metals was stronger than shoot's. The soil critical value of Cd, Pb and Cu in the contaminated soil that Eulaliopsis binata grew on can be established as 10 mg·kg~-1, 300 mg·kg~-1 and 100 mg·kg~-1 respectively, and the critical value of other two kinds of element need to be studied further, and the content of chlorophyll and chlorophyll a/b in Eulaliopsis binata grew on treatment soils with Cd, Pb, Cu, Zn and As single pollution was less than that of check. With the increasing of the concentration of Cd, Pb, Cu, Zn and As, the content of chlorophyll increased first and decreased afterwards. With the increasing of the concentration of As and Cd, the activity of SOD increased first and decreased afterwards. But the activity of SOD decreased with the increasing of the concentration of Pb, Cu and Zn. The activity of CAT and POD increased with the increasing of the concentration of As and it increased first and decreased afterwards with the increasing of the concentration of Cd, Pb, Cu and Zn. It is different that the same heavy metal affected the activity of SOD, CAT and POD. Under the different treatment levels, the content of Cu in Eulaliopsis Binata increased first and decreased afterwards and the content of Cd, Pb, Zn and As in Eulaliopsis Binata are increasing with the increasing of the treatment concentration.Under the different concentrations of Cd, Pb, Cu, Zn and As compound pollution, the resistance of Eulaliopsis binata's root to heavy metals was stronger than shoot's. When the dosages of the heavy metals added to the soils were closed to the Second Grade National Environmental Quality Standard for Soil (GB15618—95), Eulaliopsis binata grew normally in appearance and its yield decreased by less 10%, so it can be considered as critical value. Under the different treatment levels, the content of Cu and Zn in Eulaliopsis Binata increased first and decreased afterwards with the increasing...