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American Journal of Plant Nutrition and Fertilization Technology

Year: 2016 | Volume: 6 | Issue: 1 | Page No.: 15-20
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Authors

Egata Shunka Tolessa

Egata Shunka Tolessa

Derbew Belew

Adugna Debela

Adugna Debela

Beshir Kedi

Keywords

Objective: Ethiopia has possibly enormous potential for potato production. The average national yield is less compared to other countries due to lack of optimum fertilization and irrigation. To improve these agronomic practices an experiment was conducted in Jimma University College of Agriculture and Veterinary Medicine greenhouse to compare the effect of nitrogen rates and irrigation regimes on yield and yield component. Methodology: The experiment was 3×3×3 factorial with three replications laid down in a randomized complete block design comprising Jalene, Guassa and Degemeng potato varieties: 130, 110 and 90 kg ha–1 nitrogen rates and 100, 80 and 60% irrigation regimes. Data was subjected to analysis of SAS 9.2 software and means separation were made using Least Significant Difference (LSD) at 5% significance level. Result: The results indicated effects of variety and irrigation significantly affected stem number and LAI. Both irrigation and variety highly significantly affected total dry weight and tuber number. Degemeng variety recorded the highest dry weight, followed by Jalenie and Guassa. The highest total dry weight was obtained at 100% irrigation, while 60% irrigation produced the lowest. Variety and irrigation interaction significantly affected tuber fresh weight. Guassa variety at 100% irrigation recorded the highest tuber fresh weight. Degemeng variety at 60% irrigation recorded the lowest tuber fresh weight. Conclusion: From the results, it can be concluded that irrigation regimes and variety were significantly affected yield and yield components while the nitrogen rates were not influenced yield and yield components of the potato varieties significantly. Further research involving higher nitrogen rates and same irrigation regimes followed by post harvest activity and quality considerations in greenhouse and open field is suggested.
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This paper good

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