Interaction between type amount and split application of nitrogen fertilizers with plant density on morphophysiological characteristics yield and yield components of canola (Brassica napus L.) in Sheshdeh region Fasa

In order to investigate the interaction of type, amount and split application of nitrogen fertilizers with plant density on morphophysiological characteristics, yield and yield components of Canola, an experiment was conducted in the Sheshdeh of Fasa in 2018-2019. Experiment was carried out as a factorial experiment based on randomized complete block design with three replications. The results showed that the effect of fertilizer on number of silique per sub-branch and per plant was significant at 5% level and the effect of plant density on 1000 seed weight, biological yield, seed yield and oil yield was significant. Ammonium sulfate (following fertilizer recommendation) had the highest number of silique per sub-branch (48.6 per sub-branch) and silique per plant (73.5 per plant) in the shoot and bud stages. The highest biological and grain yield (12840 and 4258 kg/ha, respectively) were obtained at plant density of 50 plants /m2. Densities of 50 and 70 were significantly different in grain yield. Based on results, the density of 50 plants/m2 and the use of ammonium sulfate in the shoot and bud stages had the highest yield of Canola