Main Article Content
Nitrogen plays an important role in protein formation, cell improvement, protoplasm and other photosynthetic activities. Therefore, a field study was conducted at Bacha Khan Agricultural Research Farm, Bacha Khan University, Charsadda, during 2015-2016. The experiment was laid down according to Randomized Complete Block design (RCBD) having three replications with plot size of 1.5m x 4m. Two factors were studied, i.e. Nitrogen levels (0, 50, 75 & 100 kg ha-1) and Seed rates (3, 6 and 9 kg ha-1). Seed rates resulted in maximum emergence (55 m-2), plant height (147 cm), thousand grains weight (3.4 g) and grain yield (2026 kg ha-1) were recorded with seed rate of 9 kg ha-1 while minimum days to maturity (155), maximum oil content (45%), Absolute growth rate (AGR) (7.4 g m-2 day-1), grain nitrogen content (2.6 %) and straw nitrogen content (1.5 %) were recorded with the seed rate of 3 followed by 6 kg ha-1. Except emergence, nitrogen performed better and maximum plant height (147 cm), 1000 grains weight (3.5 g), grain yield (2211 kg ha-1), Absolute growth rate (AGR) (10.3 g m-2 day-1), Nitrogen content in grain (2.7 %) and nitrogen content in straw (1.6 %) were achieved with 100 kg N ha-1 while minimum days to maturity (155) and grain oil content (44%) were obtained with 50 kg N ha-1. Grain yield and oil content of canola increased with seed rate 6 kg followed by 9 kg ha-1 while 100 & 50 kg N ha-1 enhanced grain yield & oil content.
Keywords: Brassica napus L; Canola; Nitrogen levels; Oil content; Protein content; Seed rates