Response of Some Improved Upland Rice Varieties to Different Sources and Rates of Nitrogen Fertilizer in A Humid Rain Forest Region


  • Demben Moses Esang
  • Angus Onwudiwe Ikeh






Nitrogen (N) is a major lacking nutrient element for the growth and yield of cereal crops Calabar, it is necessary to determine the response different sources and rates of N  in four varieties of upland  rice. Treatments comprised factorial combinations of the four rice varieties (NERICA 1, NERICA 2, FARO 45, FARO 48), three straight inorganic N sources (urea, Calcium ammonium nitrate, ammonium sulphate) and four levels of N (0, 30, 60, 90 kg N ha-1) laid in randomized complete block design. The N was split applied twice; one-third at the beginning of tillering and the remainder at panicle initiation. The results showed that the source of fertilizer N did not affect significantly the growth and yield of the rice crop (p=0.05). Considering that soils in Calabar are acid sands it will not be advisable to consistently apply such acidifying fertilizers as ammonium sulphate or urea except with soil liming which will undoubtedly increase the cost of production and probably make it unprofitable to cultivate rice in the area. The fertilized crop grew taller and produced more biomass compared with the control. It also produced significantly more tillers hill-1, panicles m-2, grains panicle-1, weight of 1,000 grains and grain yield. However, whereas NERICA 1, NERICA 2 and FARO 45 were more responsive to lower N levels, the grain yield of FARO 48 was significantly higher when the crop received 90 kg N ha-1 compared with other varieties, probably because of its longer growth duration in the field.  The responsiveness of these varieties to low N application was the result of their higher grain yield resulting from enhanced N use efficiency. Genotypes that were most responsive to low N input levels were early maturing with high N-use efficiencies. On the basis of grain yield, it is recommended that for  high yield in the humid region of Cross River State, N should be applied at the rate of  60 kg ha-1 for early-  and 90 kg ha-1 or above for the medium-maturing upland rice varieties.

Keywords: Rice, Varieties, Growth and Yield

Author Biographies

Demben Moses Esang

Department of Crop Production
College of Agronomy
Federal University Agriculture Makurdi Benue State Nigeria

Angus Onwudiwe Ikeh

Department of Crop Science
Faculty of Agriculture, University of Uyo
Uyo Akwa Ibom State, Nigeria



Africa Rice Centre (2010). Rice data systems for sub-Saharan Africa: contribution to the Japan-Africa Rice emergency rice project updated synthesis report submitted to the Government of Japan. Africa Rice Center, Cotonou, Benin, September 30, 2010. Pg 3-7

Balasubramanian, V., Sie, M.,Hijmans, R. J. & Otsuka, K. (2007). Increasing rice production in sub-saharan Africa:challenges and opportunities. Advances in Agronomy 94: Pg 55-133

Barraclough, P.B., Howarth, J. R. & Jones, J. (2010). Nitrogen efficiency of wheat: genotypic and environmental variation and prospects for improvement. European Journal of Agronomy, Pg 33:1-11

Binang, W. B. & Okpara, D. A. (2011). Responsiveness of rice (Oryza sativa) to different sources and rates of N in the mangrove swamp soils of Cross River estuary. Journal of Agricultural Research and Policies 6(1): Pg 92-96

Binang, W. B., Shiyam, J. O., & Ntia, J. D. (2012). Effect of seed priming method on agronomic performance and cost-effectiveness of rainfed, dry-seeded NERICA rice. Research Journal of Seed Science 5(4): Pg 136-143

Binang, W.B., Ntia, J. D. & Shiyam, J. O. (2012). Genotype and seeding date effects on performance of mangrove rice (Oryza sativa L.) in the Cross River Estuary. Journal of Agronomy 11(3): Pg 79-84

Black, C. A. (1993). Soil fertility evaluation and control, CRC press, Boca Raton, Florida, Pg 66-67

Bouyoucos, G. J. 1951. A recalibration of the hydrometer method for making mechanical analysis of soils. Agronomy Journal 45. Pg 435-438.

Chevalier, P. & Schrader, L. E. (1977). Genotypic differences in nitrate absorption and partitioning of N among plant parts in maize. Crop Science, 17: Pg 897-901

Cox, M. C., Qualset, C. O. & Rains, D. W. (1985). Genetic variation for N assimilation and translocation in wheat. Crop Science Journal, 25: Pg 430-435.

De Datta, S. K. & Broadbent, F. (1990). Methodology for evaluating N utilization efficiency by rice genotypes. Agronomy Journal 80: Pg 793-798

Genstat Discovery Edition 1 (2003). Laws Agricultural Trust (Rothamsted Experimental Station), U. K.

Gomez, K. A. & Gomez, A. A. (1984). Statistical procedures for Agricultural Research, New York, John Wiley and sons, Pg 19-97

Grist, D. H. (1983). Rice 5th edition. London and New York, Longman, Pg 487 -534

Gupta, P. C. & O’Toole, J. C. (1986). Upland rice: a Global perspective. Manila: International Rice Research Institute. Pg 148-180

Hawkesford, M. J. (2011). An overview of nutrient use efficiency and strategies for crop improvement. In: the molecular and physiological basis of nutrient use efficiency in crops, 1st ed. M. J. Hawkesford & P. Barraclough (eds.), John Wiley and Sons, Inc. Pg 5-19

International Institute of Tropical Agriculture (IITA) (1979). Selected methods for soil and plant analysis. manual series no 1. IITA, Ibadan, Pg 70

Inthapanya, P., Sipaseuth, P., Sihavong, V. Sinathep, M., Chanphengsay, M., Fukai, S &

Jackson, M. L. (1969). Soil chemical analysis: advanced course 2nd ed. Department of Soil Science University of Wisconsin, USA. Pg 217-234.

Maranville, J. W., Clark, R. B. & Ross, W. M. (1980). Nitrogen efficiency in grain sorghum. Plant Nutrition Journal 2(5): Pg 577-589.

NCRI (National Cereals Research Institute) (2008). Training Manual on Rice Production and Processing. Dissemination of Research Results Series. Badaggi, Niger State-Nigeria. Pg 47-122

Oikeh, S. O., Nwilene, F., Diatta, S., Osiname, O., Toure, A. & Okhidievbie, O. (2006). Agrophysical responses of upland NERICA rice to nitrogen and phosphorus fertilization in the forest agroecology of West Africa. Paper presented at the ASA-SSSA 2006 international meetings, Indianapolis, USA. 12-16 Nov. 2006, Pg 44-167.

Peng, S. & Cassman, K. G. (1998). Upper thresholds of nitrogen uptake rates associated nitrogen fertilizer efficiencies in irrigated rice. Agronomy Journal 6: Pg 132

Sohl, (2005). Rice is life in 2004 and beyond. International Rice Commission Newsletter, 14(4): Pg 36-37

United States Agency for International Development (USAID) (2009). Nigeria rice value chain analysis-Draft report, Pg 48

WARDA (2008). NERICA: The New Rice for Africa-a compendium. Somado, E. A., Guei, R. G., Keya, S. O. (eds.) Africa Rice Center (WARDA), Cotonou, Benin; Rome, Italy; Tokyo, Japan Sasakawa Africa Association, Pg 210

WARDA(West African Rice Development Association) (2008). Promising Technologies for Rice Production in West and Central Africa. WARDA, Bouake, Cote D’voire and FAO Rome, Italy. Pg 122-304

Yoshida, S. (1972). Physiological aspects of grain yield. Annual Review of Plant Physiology 23: Pg 437-464

Yoshida, S. (1983). Rice Symposium on Potential Productivity of Field Crops under Different Environments. International Rice Research Institute. Pg 103-129




How to Cite

Esang, D. M., & Ikeh, A. O. (2021). Response of Some Improved Upland Rice Varieties to Different Sources and Rates of Nitrogen Fertilizer in A Humid Rain Forest Region. American Journal of Agricultural Science, Engineering and Technology, 5(2), 69–91.