Response of Physiological Characteristics of Sardary Wheat Ecotypes to Foliar Application of Humic Acid Before and After Flowering in Dryland Conditions

In order to provide enough products in cereal crops especially wheat, as the main base of human nutriment, enhancing yield of this crop is necessary. Also, role of nutrient elements in increasing yield per unit of area is hugely important. Therefore, an experiment was conducted to assess the effects of humic acid and iron spraying on physiological traits and yield of Sardari wheat ecotypes in Kurdistan University Research Farm at 2012-2013 cultivation season. The experiment was performed as split-split plot based on randomized complete block design with three factors and three replications. Experimental factors included: 13 ecotypes of Sardary and Azar2 cultivar were allocated to main plots. Spraying time in two levels was posed in sub plots and foliar application at four levels was considered as sub-sub plots. The results showed that spraying with humic acid and iron had significant effects on the studied traits. Comparison of means indicated that spraying increased seed yield in wheat ecotypes. In general spraying with humic acid and iron and their mixed spraying caused an increase in seed yield by 46.44, 31.42 and 42.74 percent compared to control, respectively. In comparison with the control treatment, spraying with iron increased seed iron content by 21.95 percent.