In order to investigate the effect of iron, manganese and zinc foliar spray on the yield and grain protein in barley, an experiment was carried out in a randomized completely block design with 3 replications in Darab, during 2012-2013. The total of 8 treatments were use
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In order to investigate the effect of iron, manganese and zinc foliar spray on the yield and grain protein in barley, an experiment was carried out in a randomized completely block design with 3 replications in Darab, during 2012-2013. The total of 8 treatments were used that consisted of T1- Control test without spraying, T2- Spraying with a concentration of 0.2% iron, T3- 0.2% zinc, T4- 0.2% Mn, T5- T2+T3, T6- T2+T4, T7- T3+T4 and T8- T2+T3+T4. The results showed that application of micronutrient fertilizers increased the yield and yield components of barley. So that the simultaneous application of iron, zinc and manganese could significantly increase the grain yield, number of grains per ear, 1000 seed weight, biological yield, harvest index, stem soluble carbohydrates and grain protein. The highest concentrations of iron, zinc and manganese in grain and leaf were observed when each one of the elements was individually sprayed on plant aerial parts. The lowest concentrations of iron, zinc and manganese in grain were obtained in the combination of zinc+ manganese, iron+ manganese and iron + zinc, respectively. Among the applied, iron had the best effect on the increase of grain yield than the other elements. By increasing the number of elements used in the spraying solutions, their efficiency in supplying the plant requirement was reduced. Based on the results of this study, it can be concluded that in addition to grain enrichment, the micronutrient fertilizers have been able to increase the yield and yield components of the barley
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