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ISSN: 2360-7874 |
Academic Research Journal of
Agricultural Science and Research |
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Vol. 8(3), pp. 200-213, April 2020 Research Methods and Deficit level on Onion (Allium cepa L.) Yield and Water Productivity
Gebeyehu Tegenu Molla
Ethiopian Agricultural Research Institute Debre Zeit Agricultural Research Center P.O.Box 32, Debre Zeit, Ethiopia. Email:gebeyehutegenu@gmail.com
Accepted 30 April 2020
Onion is one of vegetable crops grown under irrigation. Furrow irrigation is most commonly used method of irrigation. Field study was carried out on clay soil at experimental site of Debre Zeit agricultural research center to investigate the effect of furrow irrigation methods and identify optimal deficit irrigation level on crop yield and water productivity of onion. Treatments include three furrow irrigation methods, viz., alternate, fixed and conventional furrow irrigations and three deficit irrigation levels of 85% ETc, 70% ETc and 55% ETc and a control irrigation of 100%ETc laid out in split plot design with three replications. A furrow irrigation method was assigned as main plots and the irrigation levels as sub plots. Irrigation water was applied at allowable soil moisture depletion (p=0.25) for onion. Analysis of variance indicate furrow irrigation methods and irrigation levels significantly (P<0.01) affected onion yield and water productivity. The highest total bulb yields were obtained from alternate furrow irrigation and control irrigation of 100%ETc application. Among the deficit irrigation, 85%ETc gave significantly higher yield. Although 55%ETc application under alternate furrow irrigation gave the highest Crop Water Use Efficiency (CWUE) and Irrigation Water Use Efficiency (IWUE), yield penalty was significant compared to all other deficit irrigation. However, deficit irrigation of 70%ETc under alternate furrow irrigation gave above the mean value of CWUE and IWUE and hence can be considered best practice in a water resources limited area.
Key words: Alternate furrow irrigation, Conventional furrow irrigation, fixed furrow irrigation
How to cite this article (APA Style): Gebeyehu TM (2020). Methods and Deficit level on Onion (Allium cepa L.) Yield and Water Productivity. Acad. Res. J. Agri. Sci. Res. 8(3): 200-213
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