Abstract

The experiment was carried out at the Department of Biology, Faculty of Education– Aden, University of Aden. It aims at knowing the effect of zinc element on the growth of tomato plants (Samia type). The study depends on the foliar spray by zinc, the leaves were treated by four zinc element concentrations (25, 50, 100 and 200 mg/L) and another without treatment used as control. All treatments and control were repeated for three times. The tomato seeds have been planted in black plastic bags and then sprayed twice with zinc. The first foliar spraying was after appearance of the real leaves (4-6) and the second spraying was done after on month. The results revealed that all the zinc treated leaves of the tomatoes plants showed higher values for the vegetative qualities. The concentration (200mg/L) of zinc treatment showed a best result of vegetative qualities like length and diameter of the stem, root length, leaves area and dry and wet weight of the root and stem and chlorophyll content of leaves, compared to the other treatments.