Effect of plant density and nitrogen fertilizer on some attribute ofgrain sorghum (sorghum bicolor (l.) moench)

A field experiment was conducted in 2010, to evaluate the effects of plant density (D1, D2 and D3: 8, 14 and 20 plant/m2) on field performance of Sorghum under different nitrogen application rates (N1, N2 and N3: application of 40, 80 and 120 kg/ha Nitrogen, respectively). The experiment was arranged asfactorial based on randomized complete block design in three replicates. Results indicated that as plant density increased tillers per plant, Steam diameter and days to 50% flowering decreased, the effects of N application rate on these traits were not significant. While tillers per unit of area increased as more plantdensity. Plant height not affected by both treatments. As plant density and N application rates raised grain yield increased. Thus, N application and plant density increases can raise yield of grain sorghum

کلیدواژه ها:

Plant density ، nitrogen ، grain yield ، Sorghum