The Effect of Zinc Sulfate Different Amount Soil and Foliar Application on Correlated Grain Characters in Sweet Corn

Abstract

This research was conducted to evaluate the effects different concentrations of zinc sulfate applications at different growth stages on sweet corn at the Research Station of Faculty of Agriculture in Islamic Azad University, Tabriz branch in 2012. The study was conducted in split plot experiment based on Randomized Complete Block Design with three replications. Treatments were seven levels of zinc sulfate application methods: (control, soil application, foliar application at 6-8 leaf growth stage, tasseling, grain filling stage, foliar application at three stages, soil application with foliar application at three stages) as main plot, three levels of foliar and soil application of zinc sulfate: (0.003, 0.005 and 0.007 for foliar application and 15, 25 and 35 kg/ha for soil application) as sub plot. Results showed that the highest grain yield correlated characters were obtained in foliar application at three stages and soil application with foliar application at three stages. In these conditions increasing of dry grain yield and ear were more than 50%. The higher values for grain production were obtained in Zn foliar application with 0.005 concentration (25 kg/ha soil application). Zinc sulfate increased Zn content of grains produced more than 100%. Thus, using Zn not only increases sweet corn grain and ear yield but also increased quality of products