Growth Analyses of Rice at Varying Nitrogen Rates in Igbaja, Guinea Savanna Ecological Zone of Nigeria
Authors/Creators
- 1. Department of Agronomy, Faculty of Agriculture, Al-Hikmah University Igbaja, Kwara State, Nigeria
- 2. Department of Crop Science, Abdullahi Fodio University of Science and Technology, Aliero. Kebbi State, Nigeria
- 3. Department of Crop Science, Usmanu Danfodiyo University, Sokoto, Sokoto State, Nigeria
- 4. Department of Soil Science, Abdullahi Fodio University of Science and Technology, Aliero. Kebbi State, Nigeria
- 5. National Cereals Research Institute, Birnin Kebbi Sub-station, Kebbi State, Nigeria
- 6. Department of Agricultural Science Education, Faculty of Vocational and Technical Education, Shehu Shagari University of Education Sokoto, Sokoto State, Nigeria
Description
Nitrogen is the most critical nutrient for rice production, influencing photosynthetic efficiency, canopy development, and yield formation. This study assessed the effects of four nitrogen levels (0, 60, 120, and 180 kg N ha⁻¹) on key growth indices of rice in the Igbaja lowlands of the Nigerian Guinea savanna. A split-plot design was used across two cropping seasons (2022 and 2023), and combined data were analyzed. Results showed that nitrogen rates significantly enhanced leaf area index (LAI), crop growth rate (CGR), relative growth rate (RGR), net assimilation rate (NAR), and harvest index (HI). Maximum values were recorded at 120 kg N ha⁻¹ for most parameters, while 180 kg N ha⁻¹ did not improve growth further. The findings indicate that 120 kg N ha⁻¹ optimizes physiological performance of rice in the Nigerian Guinea savanna ecology.
Files
GJRALS22338.pdf
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