عنوان مقاله [English]
Wheat is one of the most important crops in the world. It is very important to use strategies that improve the yield of wheat. In order to investigate the effects of foliar application of cytokinin on physiological traits and yield of wheat cultivars, a factorial experiment was conducted based on randomized complete block design with tree replications at the research farm of Agriculture Faculty, the University of Zanjan in the during cropping seasons of 2016. The Experimental treatments included foliar application of 6-benzylaminopurine in two level (0 (control) and 50 µM) and six cultivars of wheat (Azadi, Karaj 3, Roshan, Falat, Sardari and Yavarus). Hormone foliar application was performed three times every seven days in the 50% stage of cluster emergence (code 55 Zadox growth stage). Photosynthetic rate, leaf area index durability, weight of thousand grain, biological yield and grain yield increased significantly with application of cytokinin. Cytokinin foliar application increased the final dry weight grain of Azadi, Roshan and Yavarus cultivars by 5.6%, 14.8% and 6.2%, respectively, but had no significant effect on other cultivars. Among the studied cultivars, Azadi cultivar with an average of 1.08 and Sardari cultivar with 1.55 mg/day had the lowest and highest grain filling rates, respectively. Application of cytokinin increased during the grain filling period of all cultivars except Roshan cultivar.