Effect of Planting Density and Nitrogen Fertilizer Amounts on Yield and Yield Components of Qabus Wheat

In order to investigate the effect of nitrogen fertilizer levels and planting density on the yield and yield components wheat cultivar of Qabus, a study was conducted in the two cropping years of 2018-19 and 2019-2020 in the farm of Gonbad. The experiment was a split plot in a randomized complete block design with three replications. Nitrogen fertilizer treatments included zero, 100, 200 and 300 kg / ha of urea source were in main plots and planting density levels included 150, 225, 300, 375, 450 and 525 seeds per square meter were in subplots. The results of analysis of variance showed that in both years of experiment, grain yield, number of spikes per square meter and number of seeds per spike were affected by different levels of nitrogen fertilizer, different levels of plant planting density and fertilizer interaction at planting density at 1% but the interaction of grain weight per spike in both years of the experiment was not affected by fertilizer levels and planting density levels. The results of comparing the mean interaction of treatments showed that the combination of fertilizer levels of 300 kg / ha and density of 300 plants per square meter in the first year of the experiment with grain yield of 4957 kg / ha and fertilizer levels of 200 kg / ha and density of 375 plants per square meter in The second year of experiment with grain yield of 4408 kg / ha had the highest value