In order to investigate the effects of zinc and boron micronutrients on yield, quality and nutrients uptake characteristies of two grain maize cultivar,647 and 704, an experiment was conducted during 2003 growing season, at the experimental research station of Qharakheil Mazandaran, Iran. A factorial experiment was conducted with ten treatments and three replications in a completely randomized block design (CRBD). Ten treatments, no fertilizer control, three levels of zinc sulfate (30, 40 and 50 kg/ha), three levels boric acid (10, 20 and 30 kg /ha), and foliar sprays of 0.3 percent zinc sulfate, boric acid, and a mixture of zinc sulfate and boric acid were compared in this experiment. The results showed that effects of zinc sulfate and boric acid on the seed yield per unit area and the yield per ear, were significantly different at(1 % level) for treatments and two cultivars. The best fertilizer treatment on the yield for both cultivars was 40 (kg/ha) zinc sulfate, and 20(kg/ha) boric acid was better than the other levels application this element. The results also revealed that fertilizer treatments were significantly affected (5% level) the zinc and protein content of seeds for both cultivars. The effects of this treatments were not significant (5% level) differences between of B, Fe and Mn concentration and P and K percentage. Application of zinc decreased Fe and Mn concentration and P percentage but had no effect on K percentage. The lowest yield and quality was recorded from control treatment. Considering foliar sprayed fertilizers the 0.3 percent mixture of zinc sulfate and boric acid revealed best results than others foliar application. Soil application of these micronutrients was more effective on yield characteristies while foliar application showed to be better considering qualitative.
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