Effect of irrigation with municipal landfill leachate on the chemicals content of the tree shoots of Populous (Populus deltoides) and Fraxinus (Fraxinus excelsior)

Abstract

In this study, the effect of irrigation with landfill leachate on the chemicals concept of the tree branches of Populous and Fraxinus was investigated. The treatments included different concentrations of landfill leachate (0, 25, 50, 75 and 100%). The results of the interaction effect of kind of species and concentration of landfill leachate on the chemicals concept of tree branches showed that increased concentration of landfill leachate leads to increasing of the micro nutrient amounts except zinc, the amount of macro nutrients and also heavy metal of plumbum. On the other hand, the amount of iron, zinc and calcium in shoot of Populous was significantly higher than that of Fraxinus trees which was resulted from being fasting growth and high level of absorbance of populous as compared to Fraxinus. According to the results of soil analysis, it can be said that increased concentration of landfill leachate resulted in the significant increasing of the amount of phosphorus, zinc, nitrogen, ferrus and manganese in the soil. Overall, the results confirmed that utilization of landfill leachate for irrigation of trees leads to increased amount of some nutrients in the soil and shoot trees but there have been no sign of toxicity in trees until concentration of 75% of landfill leachate. So, it can be concluded that landfill leachate has potential to be used as liquid fertilizer and its heavy metal concept is tolerable for populous and fraxinus trees. With proper management it can be utilized as fertilizer for reinforcement of soil and some of tree species.

Keywords

• soil pollution
• nutrient element
• urban green space
• heavy metal