Assess Effect of Different level of Nitrogen Fertilizer on Redistribution, Efficiency and Contribution of Redistribution and Current Photosynthesis of Wheat Genotypes

BACKGROUND: Management of nutrients, especially nitrogen, in order to wheat economic production and maintain sustainable agriculture to provide food security, is considered to have an important priority. Fertilizer management plays an important role for obtaining satisfactory yields and increase crop productivity. OBJECTIVES: This research was done to evaluate response of crop production and agrophysiological traits of wheat genotypes to apply different level of nitrogen fertilizer. METHODS: Current study was conducted according split plots experiment based on randomized complete block design with three replications. Main factor included four levels of nitrogen fertilizer (N1=60, N2=120, N3=180, N4=240 kg.ha-1) and sub plots consisted four genotypes of Bread (V1: S85-19 as line, V2: Chamran) and Durum (V3: Behrang, V4: Dena) Wheat. RESULT: According result of analysis of variance effect of different level of nitrogen fertilizer, genotypes and interaction effect of treatments on all studied traits was significant at 5% probability level. Evaluation mean comparison result of interaction effect of treatments on all measured traits revealed the highest amount of seed yield (610 gr.m-2), number of spike per square meter (1010), rate of redistribution (162.97 gr.m-2), efficiency of redistribution (0.24 gr.gr-1), contribution of redistribution (50.50%), rate of current photosynthesis (737.67 gr.m-2), efficiency of current photosynthesis (0.95 gr.gr-1) and contribution of current photosynthesis (83.50%) were noted for 180 kg.ha-1 nitrogen fertilizer and Chamran genotype and lowest amount of mentioned traits belonged to nonuse of fertilizer and S-85- 19 line treatments. CONCLUSION: Finally according result of current study application 180 kg.ha-1 nitrogen fertilizer and Chamran genotype had the maximum amount of studied traits and it can be advice to producers in studied region.