The Effect of Selected Trichoderma Fungi on Bioremediation of Heavy Elements Cadmium, lead and Zinc in Sunflower Subculture

Today, soil contamination with heavy metals is considered as one of the most important pollutants.In this study, we can state some of their harmful or beneficial effects by investigating the impact of heavy metals in the soil under sunflower cultivation.In this research, 70 soil samples were collected from a depth of 0-20 cm randomly and compositely, and the total concentration of lead, cadmium, zinc and copper elements was measured using Perkin-Elmer atomic absorption device.Some soil properties including pH, electrical conductivity, percentage of carbon and organic matter, percentage of lime and soil texture were also measured in the samples The results of this study proved the ability of sunflower plants to reduce the percentage of harmful heavy metals in the soil..The best results in reducing these metals were achieved in the interaction treatments between sunflower and bio-fungi Trichoderma harzianum.