Evaluation Impact of Different Irrigation Regime and Nitrogen Fertilizer on Qualitative Characteristics of Wheat

BACKGROUND: One of limitation factor in agricultural plants production in dry areas, supply requires water. Also nutrition crop management is a necessary strategy for achieve sustainable agriculture. OBJECTIVES: Current study was conducted to assessment the effects of different irrigation regimes and several amount of nitrogen fertilizer on seed nutrition content and qualitative trait of wheat. METHODS: This research was done via factorial experiment based on completely randomized design with three replications. The factors consisted different irrigation regime (I1=half of water demand, I2= equal of water demand and I3=1.5 water demand) and nitrogen fertilizer (N1=nonuse of nitrogen or control, N2=50%, N3=75% and N4=100% according soil test). RESULT: According result of analysis of variance effect of different level of nitrogen fertilizer, irrigation regime and interaction effect of treatments on all measured traits (instead phosphorus concentration) was significant at 1% probability level. Mean comparison result of different level of irrigation regime indicated that maximum nitrogen concentration was noted for half of water demand and minimum of that  belonged to 1.5 water demand treatment, so increasing the volume of consumed water led to decrease the seed nitrogen concentration from 1.73 mg.kg-1 to 1.49 mg.kg-1. Nitrogen fertilizer increased nitrogen content from 1.2 in control to 2 mg.kg-1 in 100% according soil test treatment but does not have significant effect on phosphorus content also led to increase potassium content. CONCLUSION: Comparison of different irrigation treatments showed that increasing the volume of water decreased seed nitrogen content, increase potassium content and don’t have significant effect on phosphorus content. Also increasing consumed water led to decreased ease seed protein content. The maximum protein concentration (15%) was noted for half of water demand and 100% according soil test.