Abstract
The effect of salicylic acid (SA) and nitrogen fertilization on forage maize was studied under drought stress in Nehbandan, Iran in 2014. It was a factorial split-plot experiment based on a Randomized Complete Block Design with three replications. The main plot was devoted to irrigation intervals. The sub-plot was factorial of two factors (nitrogen and SA). It was found that deficit irrigationdeclined quantitative yield of maize. Nitrogen fertilization improved forage yield. Fresh and dry forage yield was 65.88 and 665.32% lower under 16-day irrigation interval than under 8-day irrigation interval, respectively. SA application enhanced dry forage yield by 7.06 and 10.35% under 8 and 16-day irrigation intervals, respectively. In total, it was revealed that the concurrent application of SA and N resulted in greater increase in fresh and dry forage yield, which was mostly via the increase in leaf stem weight, as compared to their sole applications.
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