Response of Nitrogen and Sulphur Fertilizers on Yield, Yield Components and Protein Content of Oilseed Mustard (Brassica spp)

An experiment was conducted in the experimental field of Sher-e-Bangla Agricultural University, to observe the effect of different levels of nitrogen and sulphur on growth, yield, yield contributing characters and protein content in seed of mustard (SAU Sharisha-1). The experiment consists of four levels of nitrogen i.e. fertilizer treatments consisted of 4 levels of nitrogen (0, 40, 80 and 120 kg N ha⁻¹ designated as N₀, N₁, N₂ and N₃, respectively) and 4 levels of sulphur (0, 8, 16 and 24 kg S ha⁻¹ designated as S₀, S₁, S₂ and S₃ respectively). The experiment was laid out in the two factors RCBD with three replications. The plant height, the number of branches plant⁻¹, the number of siliqua plant⁻¹, seed and shoot yield increased with increasing N level up to 80 kg N ha⁻¹. Further increasing in N level i.e. 120 kg N ha⁻¹ had a negative effect on seed yield. On the other hand, with increasing S levels plant height, slilqua plant⁻¹, 1000 seed weight increased significantly up to 16 kg S ha⁻¹. However, the number of branches plant⁻¹ and seed yield and shoot yield increased up to the highest dose of S (24 kg S ha⁻¹). Considering the combined effect of N and S, the treatment combination N₂S₃ produced the maximum seed yield (1738 kg ha⁻¹). Protein content increased from 19.38% to 21.81% as S rate was increased from 0 to 16 kg ha⁻¹. The highest N level resulted in the highest values for protein (22.31%).