M.A. Thesis:

Reaction of three barley cultivars to foliar application of complete fertilizer with high percentage of phosphorus

In order to investigate the response of three barley cultivars to foliar application of complete fertilizer with high percentage of phosphorus in the anthesis stage, a factorial experiment was conducted in a randomized complete block design with three replications in Davarzan, Khorasan Razavi province. The experimental factors included high phosphorus complete fertilizer concentrations (10-15-10), in four levels of zero (foliar application with water), 0.3, 0.45 and 0.6% and barley cultivars in three levels of Mehr, Khatam and Reyhan. The results showed that except for 1000-seed weight, all traits including plant height, number of fertile tillers per plant, spike length, number of seeds per spike, biological yield, grain yield and harvest index were affected by cultivar. The highest plant height belonged to Reyhan cultivar and the lowest belonged to Khatam cultivar. Mehr cultivar had the highest number of fertile tillers per plant, spike length, number of seeds per spike, grain yield, biological yield and harvest index. The foliar application of high phosphorus complete fertilizer had significant effect on all studied traits, except harvest index. The highest plant height, number of fertile tillers per plant, spike length, number of seeds per spike, grain yield and biological yield were obtained by foliar application of 0.6% high phosphorus complete fertilizer. However, the highest 1000-seed weight was observed in the foliar application of high phosphorus complete fertilizer with a concentration of 0.45%. Regarding plant height, spike length, number of seeds per spike, 1000-seed weight, grain yield and biological yield, there was no significant difference between 0.6 and 0.45% concentrations of high phosphorus complete fertilizer. According to the results, cultivation of Mehr cultivar and foliar application of high phosphorus complete fertilizer with a concentration of 0.45% in the anthesis stage is recommended to produce optimal barley yield in similar climatic conditions.

Keywords: Key word: Cultivar, phosphorus, complete fertilizer, pollination, foliar application