Influence of irrigation conditions and micronutrients spraying on soybean yield

摘要

A field experiment was conducted at the agriculture research and experimental station of the faculty of agriculture at Kermanshah, Iran in 2010 growing season. In this study, the impact of zinc, iron and manganese foliar application and withholding irrigation at different growth stages of soybean plants on oil, protein, economic and biological yield, harvest index and grain dry weight was studied. The experiment was conducted as a split plot based on Randomized Complete Block with three replications.Four irrigation regimes and eight micronutrients foliar treatments are replaced in main and sub plot, respectively. Based on results obtained, irrigation regimes and micronutrient foliar application had significant effects on oil, protein and grain andbiological yield of soybean. Regular Irrigation produced the highest oil per cent, grain and biological yield. Whereas, protein content in soybean seed with water deficit at seed filling period was increased. In addition, the highest oil concentration insoybean seed was recorded when that zinc used separately. In this study, zinc and manganese foliar application decreased the adverse effects of drought stress on grain and biological yield of soybean plants. Also, Fe foliar application increased grain dry weight up to 13.3% compared MO (Check treatment).