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Effect of sewage irrigation on yield, tree components and heavy metals accumulation in navel orange trees
AbstractFive soil sites irrigated with sewage water for 10, 20, 30, 40 and 60 years were chosen to study the effect of this irrigation on orange trees. Growth density, shoot lenght, fresh and dry weight of leaves, fruit weight, peel thickness and fruit yield increased remarkably with time of sewage irrigation. Fruit juice per cent and leaf number per shoot exhibited slight variations in response to sewage treatments. Leaves contained the most heavy metals followed by peels. Juice contained the lowest concentration of all the heavy metals investigated, but concentrations tended to increase with prolonged sewage application. Contents of heavy metals were as follows: Fe>Zn>Mn>Cu>Ni>Pb>Cd>Co in leaves and peels and Cu>Mn>Zn>Fe>Ni>Cd>Pb>Co in juice. The longer the time of sewage application to the orange trees the greater the vegetative growth, fruit yield and heavy metals content. However, the concentration of heavy metals in fruit juice was within the permissible limits and below the level toxic to man or plants.
Effect of sewage irrigation on yield, tree components and heavy metals accumulation in navel orange trees
AbstractFive soil sites irrigated with sewage water for 10, 20, 30, 40 and 60 years were chosen to study the effect of this irrigation on orange trees. Growth density, shoot lenght, fresh and dry weight of leaves, fruit weight, peel thickness and fruit yield increased remarkably with time of sewage irrigation. Fruit juice per cent and leaf number per shoot exhibited slight variations in response to sewage treatments. Leaves contained the most heavy metals followed by peels. Juice contained the lowest concentration of all the heavy metals investigated, but concentrations tended to increase with prolonged sewage application. Contents of heavy metals were as follows: Fe>Zn>Mn>Cu>Ni>Pb>Cd>Co in leaves and peels and Cu>Mn>Zn>Fe>Ni>Cd>Pb>Co in juice. The longer the time of sewage application to the orange trees the greater the vegetative growth, fruit yield and heavy metals content. However, the concentration of heavy metals in fruit juice was within the permissible limits and below the level toxic to man or plants.
Effect of sewage irrigation on yield, tree components and heavy metals accumulation in navel orange trees
Omran, M.S. (author) / Waly, T.M. (author) / Abd Elnaim, E.M. (author) / El Nashar, B.M.B. (author)
Biological Wastes ; 23 ; 17-24
1987-04-20
8 pages
Article (Journal)
Electronic Resource
English
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