Changes in yield and yield components of three cultivars of Barley under different Nitrogen Levels in Isfahan region

ABSTRACT: In order to study the effect of different nitrogen levels on yield components and seed yield of three barley cultivars, an experiment was conducted in 2010-2011 in a research farm of farming building of Islamic Azad University Khorasgan (Isfahan) Branch located in Khatun abad village (latitude 32o /40ʹ N and Longitude 51o /48ʹ E). A split plot layout within randomized complete block design with 4 replications was used. Main plot were different level of nitrogen fertilizer (0, 50,100 and 150 kg ha-1) from urea source, and sub plot were different cultivars (Nosrat, Reyhan03 and Binam). Condition represented the effect of nitrogen was significant on number of spikes m-2, number of seeds spike-1, 1000seed weight, seed yield, biological yield and harvest index. 100 kg N ha-1 fertilizer treatment resulted the maximum of all mentioned factors except 1000seed weight and harvest index. Effect of cultivar was significant on number of spikes m-2, number of seeds spike-1, 1000seed weight, seed yield, biological yield and harvest index. The maximum of all mentioned factors related to Nosrat cultivar. Interaction of nitrogen and cultivar was significant on number of spikes m-2,1000seed weight, seed yield and biological yield. On the basis of the results obtained, the fertilizer treatment 100 kg N ha-1 and Nosrat cultivar might be suitable for barley productive under the condition similar to the present study.