Eurasian Journal of Soil Science

Volume 9, Issue 2, Apr 2020, Pages 105 - 118
DOI: 10.18393/ejss.663486
Stable URL: http://ejss.fess.org/10.18393/ejss.663486
Copyright © 2020 The authors and Federation of Eurasian Soil Science Societies



Effect of potassium levels on teff (Eragrostis tef (Zucc.) Trotter) growth and yield in Central Highland Vertisols of Ethiopia

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Demiss,M., Mamo,T., Beyene,S., Kidanu,S., 2020. Effect of potassium levels on teff (Eragrostis tef (Zucc.) Trotter) growth and yield in Central Highland Vertisols of Ethiopia. Eurasian J Soil Sci 9(2):105 - 118. DOI : 10.18393/ejss.663486
Demiss,M.,Mamo,T.Beyene,S.,& Kidanu,S. Effect of potassium levels on teff (Eragrostis tef (Zucc.) Trotter) growth and yield in Central Highland Vertisols of Ethiopia Eurasian Journal of Soil Science, 9(2):105 - 118. DOI : 10.18393/ejss.663486
Demiss,M.,Mamo,T.Beyene,S., and ,Kidanu,S."Effect of potassium levels on teff (Eragrostis tef (Zucc.) Trotter) growth and yield in Central Highland Vertisols of Ethiopia" Eurasian Journal of Soil Science, 9.2 (2020):105 - 118. DOI : 10.18393/ejss.663486
Demiss,M.,Mamo,T.Beyene,S., and ,Kidanu,S. "Effect of potassium levels on teff (Eragrostis tef (Zucc.) Trotter) growth and yield in Central Highland Vertisols of Ethiopia" Eurasian Journal of Soil Science,9(Apr 2020):105 - 118 DOI : 10.18393/ejss.663486
M,Demiss.T,Mamo.S,Beyene.S,Kidanu "Effect of potassium levels on teff (Eragrostis tef (Zucc.) Trotter) growth and yield in Central Highland Vertisols of Ethiopia" Eurasian J. Soil Sci, vol.9, no.2, pp.105 - 118 (Apr 2020), DOI : 10.18393/ejss.663486
Demiss,Mulugeta ;Mamo,Tekalign ;Beyene,Sheleme ;Kidanu,Selamyihun Effect of potassium levels on teff (Eragrostis tef (Zucc.) Trotter) growth and yield in Central Highland Vertisols of Ethiopia. Eurasian Journal of Soil Science, (2020),9.2:105 - 118. DOI : 10.18393/ejss.663486

How to cite

Demiss, M., Mamo, T., Beyene, S., Kidanu, S., 2020. Effect of potassium levels on teff (Eragrostis tef (Zucc.) Trotter) growth and yield in Central Highland Vertisols of Ethiopia. Eurasian J. Soil Sci. 9(2): 105 - 118. DOI : 10.18393/ejss.663486

Author information

Mulugeta Demiss , Agricultural Transformation Agency (ATA), Addis Ababa, Ethiopia
Tekalign Mamo , Agricultural Transformation Agency (ATA), Addis Ababa, Ethiopia
Sheleme Beyene , Hawassa University, College of Agriculture, Pox 05. Hawassa Ethiopia
Selamyihun Kidanu , OCP Societe Anonyme, Commercial Representative Office. Addis Ababa, Ethiopia

Publication information

Article first published online : 23 Dec 2019
Manuscript Accepted : 15 Dec 2019
Manuscript Received: 19 Feb 2018
DOI: 10.18393/ejss.663486
Stable URL: http://ejss.fesss.org/10.18393/ejss.663486

Abstract

Nutrient depletion and imbalance are among the major attributes that contribute to declining soil productivity in the highlands of Ethiopia. The blanket fertilizer recommendation, which considered only urea and Di-ammonium phosphate (DAP), was used over the past four decades to improve soil fertility for enhancing crop production. Nevertheless, the average national yields of small cereal including teff were low, despite application of nitrogen and phosphorus (NP) fertilizers. On-farm trials were conducted in the 2015/16 and 2016/17 cropping seasons at 18 locations on Ethiopian highland Vertisols to determine the response of teff to potassium (K) fertilization along with other limiting nutrients. Five K levels (0, 30, 60, 90 and 120 kg ha-1) in the form of murate of potash (KCl) were used in randomized complete block design with three replications. Separate analysis of variance was conducted for each sites and year. Least Significant Difference (LSD) test at P ≤ 0.05 was used to separate means whenever there were significant differences. Analysis of variance revealed a highly significant difference (P < 0.01) between treatments in both straw and grain yields and tissue nitrogen (N) and K concentrations of teff over the two-cropping seasons in 67% of the test locations. Additionally, responses to K were obtained on soils with available K test ranging between 166 and 282 mg kg-1. The Ca: K and Mg: K ratios were strongly and negatively correlated with relative yield and the correlations suggest that soil with Ca: K > 50:1 and Mg: K >15:1 are likely to respond to potassium fertilization. The yield advantage accrued due to K application ranged from 30 to 77% in 2015/16 and 8 to 51% in 2016/17 seasons. The economic optimum K fertilizer application rates varied between 60 kg K ha-1 in 44% of the sites to 90 kg K ha-1 in 23% of the sites. The findings highlighted the need for revisiting fertilizer program to enhance the yield and nutrient uptake of teff in K responsive soils and developing critical levels for K in the study sites.

Keywords

Critical level, murate of potash, grain yield, balanced nutrition, crop response.

Corresponding author

References

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Alam, M.R., Ali, M.A.. Molla, M., Momin, M., Mannan. M., 2010. Evaluation of different levels of potassium on the yield and protein content of wheat in the high Ganges river floodplain soil. Bangladesh Journal of Agricultural Research 34(1): 97-104.

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Abstract

Nutrient depletion and imbalance are among the major attributes that contribute to declining soil productivity in the highlands of Ethiopia. The blanket fertilizer recommendation, which considered only urea and Di-ammonium phosphate (DAP), was used over the past four decades to improve soil fertility for enhancing crop production. Nevertheless, the average national yields of small cereal including teff were low, despite application of nitrogen and phosphorus (NP) fertilizers. On-farm trials were conducted in the 2015/16 and 2016/17 cropping seasons at 18 locations on Ethiopian highland Vertisols to determine the response of teff to potassium (K) fertilization along with other limiting nutrients. Five K levels (0, 30, 60, 90 and 120 kg ha-1) in the form of murate of potash (KCl) were used in randomized complete block design with three replications. Separate analysis of variance was conducted for each sites and year. Least Significant Difference (LSD) test at P ≤ 0.05 was used to separate means whenever there were significant differences. Analysis of variance revealed a highly significant difference (P < 0.01) between treatments in both straw and grain yields and tissue nitrogen (N) and K concentrations of teff over the two-cropping seasons in 67% of the test locations. Additionally, responses to K were obtained on soils with available K test ranging between 166 and 282 mg kg-1. The Ca: K and Mg: K ratios were strongly and negatively correlated with relative yield and the correlations suggest that soil with Ca: K > 50:1 and Mg: K >15:1 are likely to respond to potassium fertilization. The yield advantage accrued due to K application ranged from 30 to 77% in 2015/16 and 8 to 51% in 2016/17 seasons. The economic optimum K fertilizer application rates varied between 60 kg K ha-1 in 44% of the sites to 90 kg K ha-1 in 23% of the sites. The findings highlighted the need for revisiting fertilizer program to enhance the yield and nutrient uptake of teff in K responsive soils and developing critical levels for K in the study sites.

Keywords: Critical level, murate of potash, grain yield, balanced nutrition, crop response.

References

Abebe, B., Workayehu, T., 2015. Effect of method of sowing and time of di-ammonium phosphate (DAP) fertilizer application, on yield and yield components of Tef ((Eragrostic tef) Trotter) at Shebedino, Southern Ethiopia. Advances in Crop Science and Technology 3: 168.

Afari-Sefa, V., Kwakye, P.K., Okae-Anti, D., Imoro, I.A., Nyamiah, M., 2004.  Potassium Availability in Soils – Forms and Spatial Distribution, The Abdus Salam International Centre for Theoretical Physics (ICTP), Preprint No.110, IC 2004, Trieste, Italy.

AgKnowledge, 2011. The fertiliser review. Issue 2. 6p. Available at [Access date: 19.02.2018]: http://agknowledge.co.nz/publications

Akhtar, M.E., Khan, M.Z., Rashid, M.T., Ahsan, Z., Ahmad, S., 2010. Effect of potash application on yield and quality of tomato (Lycopersicon Esculentum Mill.). Pakistan Journal of Botany 42(3): 1695–1702.

Alam, M.R., Ali, M.A.. Molla, M., Momin, M., Mannan. M., 2010. Evaluation of different levels of potassium on the yield and protein content of wheat in the high Ganges river floodplain soil. Bangladesh Journal of Agricultural Research 34(1): 97-104.

Ashok, Singh, J.P., Kumar, N.C., Singh, G.R., 2009. Effect of the levels of potassium and manganese on the uptake of N, P, and K and yield of wheat. Journal of  Agricultural Physics 9: 28–32.

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