Response Corn Crop Production to Use Organic and Chemical Nitrogen Fertilizers Un-der Warm and Dry Climate Condition (Khuzestan Province)

BACKGROUND: Long-term experiments in fixed plots of combined use of organic and chemical fertilizers showed the greatest increase in the amount of soil organic carbon compared to the use of each of the organic and chemical fertilizers alone. OBJECTIVES: This Research was conducted to evaluate effect of different level of fertilizer and biofertlizer on seed yield and its components of Corn. METHODS: Current study was done according randomized complete block design (RCBD) with three replications at Shahid Salemi field in south west of Iran-Ahvaz. The studied treatments included Urea application only, Nitroxin application only, Nitroxin + 25% Nitrogen from Urea source, Nitroxin + 50% Nitrogen from Urea source, Nitroxin + 75% Nitrogen from Urea source, Azotobacter application only, Azotobacter + 25% Nitrogen from Urea source, Azotobacter + 50% Nitrogen from Urea source, Azotobacter + 75% Nitrogen from Urea .source RESULT: According result of analysis of variance effect of treatment on all measured traits was significant. As for Duncan classification made with respect to different level of treatment maximum and minimum amount of 1000-grain weight belonged to T5 (237 gr) and T6 (205 gr). Assessment mean comparison effect of treatments on all measured traits indicated maximum amount of seed yield (3670 kg.ha -1 ), biological yield (9217 kg.ha -1 ), harvest index (39.8%), 1000-grain weight (237 gr), number of row per ear (14) and number of grain per row (19) were noted for Nitroxin + 75% Nitrogen from the Urea (T 5 ) and lowest amount of mentioned traits belonged to Azotobacter application only treatment (T 6 ). CONCLUSION: Generally, the simultaneous use of biological fertilizers and Urea can be an effective step towards reducing the consumption of chemical fertilizers and health quality of agricultural products, in addition to producing sufficient yields.