International Commission of Agricultural and Biosystems Engineering
Abstract
A Pot experiments was carried out in National Research Centre Cairo Egypt during two successive seasons 2015 /2016 to investigate the effect of pollutants soil by ( Zn,Cd and Pb ) on Harpullia pendula, Sterculia acerifolia and Ficus racemosa growth. Cadmium as cadmium carbonate was added at the rate of 0.089/Kg soil+Liad as liad carbonate was added to the rate of 0.08 Kg soil+Zn as Zink citrate was added at the rate of 1-2 g/Kg soil, all this were added and thoroughly mixed with before cultivation. Results showed that, Pb+Cd+Zn applied in combination have been proved effective in increasing plant height, number of leaves, root length, as well as stem diameter and fresh weight and dry weight of leaves and roots of Sterculia acerifolia tree compared with untreated tree. On the contrary, root length, stem diameter and dry weight not affected and approximately equal to the untreated plants in both of Harpullia and Ficus plant. The highest values concentration of ( Zn+Cd+Pb ) was found in roots of all trees. While the previous heavy metals recorded lowest concentration in leaves of the three mentioned plants compared to control. All Harpullia pendula, Sterculia acerifolia and Ficus racemosa trees showed higher tolerance to heavy metals Zn, Cd and Pb especially Ficus racemosa tree accumulated the higher Cd in roots.Key words: heavy metals, ornamental plants, soil pollutan