Open Access Open Access  Restricted Access Subscription or Fee Access

Evaluation of NPSB Fertilizer Rate for Better Production of Onion (alliumcepa.l) in Silte Zone Southern Ethiopia

Sasahu Lewot, Tarekegn Tefera Lele


Onions are an economically important crop in the study area. However, its productivity is far below from its potential yield due to poor soil fertility management. Therefore, the present study was initiated to determine the optimal rate of compound fertilizer required for onion production. A field experiment was conducted for a year in 2020in the farmer's field in Silti district. The experiment consisted eight treatments arranged in a randomized complete block design with three replicates. Treatments included six rate of NPSB fertilizer (75 N 54 P2O5 10 S 1.06 Bkgha-1, 89.6 N 67 P2O512.06S 1.27 Bkgha-1, 105 N 75.8 P2O5 14.07S 1.49Bkgha-1, 120N 86.6 P2O516S 1.7Bkgha-1, 135N 97 P2O5 18S 1.9 Bkgha-1, 147N 106.49 P2O5 19.76S 2.09 Bkgha-1), 92N 62 P2O5 kgha-1 and control (unfertilized plot). The result of experiment showed that application of different rate of blended fertilizer significantly affected the yield and yield related traits of onions. The highest (31,489 kg ha-1) and lowest (7,167 kg ha-1) yields were obtained from plots receiving 147N 106.49 P2O519.76 S 2.09 Bkgha-1 and plots that received no fertilizer respectively.Since the onion yield still increased with increasing amount of fertilizer and the result is based on one season and one location, it is proposed to repeat the experiment in study area at different locations and seasons by increasing the amount of fertilizer.


Blended fertilizer, fertilizer rate, inorganic fertilizer, Onion, Yield

Full Text:



Rabinowitch, H. D. "Seed development in: Rabinowitch HD, Brewster JL (eds) Onions and allied crops. Vol I Botany physiology and genetics." (1990): 151-159.

Grubben, G. J. H., and Olanrewaju A. Denton. "Plant resources of tropical Africa 2. Vegetables." Plant resources of tropical Africa 2. Vegetables. (2004).

Shiberu, Tadele, and Amin Mahammed. "The importance and management option of onion thrips, Thrips tabaci (L.)(Thysanoptera: Thripidae) in Ethiopia: A review." Horticulture 1.2 (2014): 1-6.

Goldman, Irwin L. "Molecular breeding of healthy vegetables." EMBO reports 12.2 (2011): 96-102.

Molla, Alemu, Derbew Belew, and Essubalew Getachew Seyum. "Effect of blended (NPSB) fertilizer rate on growth and yield of onion (Allium cepa. L.) varieties at Gubalafto district, North-Eastern Ethiopia." AGBIR 36.2 (2020): 1-6.

Rizk, Fatma A., et al. "Effect of different nitrogen plus phosphorus and sulphur fertilizer levels on growth, yield and quality of onion (Allium cepa L.)." Journal of Applied Sciences Research July (2012): 3353-3361.

Tesfalegn, Jambo Asfaw, and Wassu Mohammed. Response of onion (Allium cepa L.) varieties to intra-row spacing at kobo, northern Ethiopia. Diss. Haramaya University, 2015.

Central Statistics Agency (CSA) (2017/2018). Agricultural Sample Survey 2017/2018 (2010 E.C.). Volume I. Report on Area and Production of Major Crops (Private Peasant Holdings, Meher Season). Statistical Bulletin 586, Addis Ababa

Food and Agriculture Organization of the United Nations. Retrieved. 2010;3(13):2012.

Demisie, Rahel, and K. Tolessa. "Growth and bulb yield of onion (Allium cepa L.) in response to plant density and variety in Jimma, South Western Ethiopia." Advances in Crop Science and Technology 6.2 (2018): 357.

Ethio, S. I. S. "Tentative list of fertilizers required in Oromia Region for 124 surveyed woredas by Ethiopian Soil Information System." MoA, ATA. Addis Ababa, Ethiopia (2014).

Geetharani, P., M. I. Manivannan, and A. S. Ponnuswamy. "Seed production of onion as influenced by the application of growth regulators and nutrients." Asian Journal of Horticulture 3.2 (2008): 301-303.

Nasreen, Shamima, et al. "Nutrient uptake and yield of onion as influenced by nitrogen and sulphur fertilization." Bangladesh Journal of Agricultural Research 32.3 (2007): 413-420.

Birhanu, Agumas, Abewa Anteneh, and Abebe Dereje. "Response of irrigated onion (Allium cepa L.) to nitrogen and phosphorus fertilizers at Ribb and Koga irrigation schemes in Amhara region, North western Ethiopia." International Research Journal of Agricultural Science and Soil Science 4.5 (2014): 95-100.

Bloem, Elke, Silvia Haneklaus, and Ewald Schnug. "Influence of nitrogen and sulfur fertilization on the alliin content of onions and garlic." Journal of Plant Nutrition 27.10 (2005): 1827-1839.

Assefa, Abraha Gebrekiros, Solomon Habtu Mesgina, and Yirga Weldu Abrha. Response of onion (Allium cepa L.) growth and yield to different combinations of N, P, S, Zn fertilizers and compost in northern Ethiopia. No. RESEARCH. 2015.

Mirete, Dargie, and Nigussie Dechassa. Influence of mineral nitrogen and phosphorus fertilizer rates on growth, yield components and bulb yield of onion (Allium cepa var. cepa) at Kobo, Northern Ethiopia. Diss. Haramaya University, 2015.

Ali, M. K., et al. "Effect of cowdung at different level of phosphorus on growth, yield and quality seed production of onion." Research Journal of Agriculture and Biological Sciences 4.1 (2008): 86-93.

Nigatu, Muluneh. Assessment of onion production practices and effects of N: P2O5: S fertilizers rates on yield and yield components of onion (Allium cepa l.) under irrigated farming system in Dembiya District, Amhara Region, Ethiopia. Diss. Bahir Dar University, 2016.


  • There are currently no refbacks.

Copyright (c) 2022 Research & Reviews: Journal of Agricultural Science and Technology