Determination of Optimum Rate of Nitrogen and Sulphur Application for Sesame (Sesamum Indicum L.) Production in Ibadan and Ogbomoso, Nigeria

Adewale Mubo Omogoye (), Ezekiel Akinkunmi Akinrinde () and Tajudeen Bamidele Akinrinola ()

Agricultural Development, 2025, vol. 10, issue 3, 9-15

Abstract: Sesame is a high-valued crop grown for its oil and protein-rich edible seed, which requires Nitrogen (N) and sulphur (S) for biosynthesis of oil and protein, and optimum seed production and nutritional content. In a 2×4×3 factorial arrangement fitted in completely randomised design with four replicates, sesame varieties E8 and NCRIBEN-01M were grown on 6 kg soil/pot with nitrogen at N0, N60, N90 and N120 kg N/ha (using urea) in combination with sulphur at S0, S30 and S60 kg S/ha (through magnesium tetra oxo sulphate VI) in screenhouses at Ibadan and Ogbomoso, Nigeria. Data were collected on plant height, stem diameter, seed weight, and seed N and S contents. Seed weight (g/plant) was used as benchmark for determining optimum N and S application rates on polynomial regression curves, which were obtained at points where second derivatives (d2y/dx2) of regression equations turn to zero. In Ibadan and Ogbomoso, seed weight ranged from 1.90±0.04 (N0×S0×E8) to 2.60±0.04 (N120×S60×NCRIBEN-01M) and 2.1±0.05 (N0×S0×E8) to 2.8±0.05 (N120×S60×NCRIBEN-01M), respectively. The seed weight of 2.6 g/plant (N90×S30×NCRIBEN-01M-Ibadan) and 2.7 g/plant (N90×S30×NCRIBEN-01M-Ogbomoso) were the optimum seed yields, while the optimum rates of nitrogen were 89 kg/ha (R2= 0.71) and 88 kg/ha (R2= 0.78) in Ibadan and Ogbomoso locations, respectively. Optimum S rates were 30.8 kg/ha (R2= 0.92) and 33.0 kg/ha (R2= 0.97). Therefore, 90 kg N/ha + 35 kg S/ha could be adopted as N-S application rate at Ibadan and Ogbomoso.

Keywords: Optimum N and S rate; Protein-rich; seed weight; Sesame varieties. (search for similar items in EconPapers)
Date: 2025
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