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Effect of zinc on growth, chemical composition and antioxidative enzyme activities of maize as influenced by different phosphorus rates were investigated. For this purpose, control and 3 rates of Zn (0.4, 2.0 and 10 mg Zn kg-1 soil) were applied to cv. Pioner-32K61 planted in pots by using Zn deficient soil under different P rates (50, 100 and 150 mg P kg-1). Phosphorus rates significantly increased P, K, Mg and protein contents and superoxide dismutase activity (SOD), but they decreased number of leaf per plant and Zn content. In contrast, increasing Zn doses significantly enhanced all growth parameters (plant height, number of leaf, dry matter yield, chlorophyll a and b, protein content of leaves), SOD activity and plant Zn content, but decreased other nutrient contents of plant and also catalase (CA) and peroxidase activities (PO). The correlation coefficients of SOD activity was affected significantly by either dry matter yield or plant Zn content. The level of plant Zn content plays an important role on growth, nutrient composition and antioxidative enzyme activities of maize. Besides, increasing PO and CA activities were not sufficient enough to increase dry matter yield under Zn deficient conditions.
M. Aydin, M. A. Demiral, M. A. Kaptan. (2006) EFFECT OF ZINC ON GROWTH, NUTRIENT COMPOSITION AND ANTIOXIDATIVE ENZYME ACTIVITIES OF MAIZE AS INFLUENCED BY PHOSPHORUS, , Volume 3, Issue 2.
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