The effect of potassium and zinc sulfate spraying at different developing stages of vegetative characteristics and yield of barley under drought stress conditions in the last periods of the cropping season

Subject Areas : crop production

جواد مرادلو ¹ (دانش آموخته كارشناسي ارشد زراعت ، واحد خوي – دانشگاه آزاد اسلامي، خوي – ايران.)
sasan rezadust ² (Department of Agronomy and Plant Breeding, Khoy Branch, Islamic Azad University, Khoy, Iran )

Received: 2016-12-21 Accepted : 2018-01-10 Published : 2018-05-31

Keywords: potassium , barley , dough stage grain , zinc , milking , irrigation cut,

Abstract :

To investigate the effect of potassium and zinc spraying at different developing stages of vegetative characteristics and grain yield of barley under drought stress conditions, a split plot experiment was carried out in a randomized complete block design with three replications at the Agricultural Research Center of Khoy in which irrigation cutting at 3 levels ( full irrigation, irrigation cutting at milking stage, and irrigation cutting in the dough stage ) in main plots and potassium sulfate and zinc sulfate spraying at four levels ( spraying at the stemming + milking, stemming + dough, milking + dough, and stemming + milking + dough ) were considered as sub plots. The results of the experiment showed that irrigation was significant at 1% level for all traits. potassium and zinc sulfate spray were significant for all traits at 1% level. The occurrence of drought stress increased the barley protein content. The increase in irrigation cut treatment at the dough stage was the highest ( 31.10% ). In addition to the spraying surfaces, treatment B4 (spraying at stemming + milking + grain dough ) proved to be better than other treatments and increased grain yield from 3924 kg ha-1 in clustering treatment to 4824 kg ha-1 in dough treatment of the grain. Interaction effect of two factors was significant only on 1000 grain weight at 1% level. Keywords :

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