Journal of Food, Agriculture and Environment

Vol 7, Issue 3&4,2009
Online ISSN: 1459-0263
Print ISSN: 1459-0255

Deficit irrigation effects on onion (Allium cepa L. E.T. Grano 502) yield in unheated greenhouse condition


Serhat Ayas 1*, Çiğdem Demirtaş 2

Recieved Date: 2009-06-30, Accepted Date: 2009-09-29


The aim of this study was to determine the effect of deficit irrigation on yield of onion grown under unheated greenhouse condition. The research was carried out at the Agricultural Research Station of Yenişehir High School of Uludağ University in Bursa, Turkey, in 2007. In the study, water was applied to onion as 100, 75, 50, 25 and 0% (as control) of evaporation from a Class A Pan corresponding to 2-day irrigation frequency. Irrigation water applied to crops ranged from 65 to 362 mm, and water consumption ranged from 95 to 372 mm. The effect of irrigation water level on the yield, bulb heigth, bulb diameter, bulb weight and dry matter ratio were found to be significant. The highest yields were 51 and 39 t ha-1 for the K1cp and K2 cp treatments, respectively. Crop yield response factor (ky) was found as 1.060. The highest values for water use efficiency (WUE) and irrigation water use efficiency (IWUE) were found to be 13.84 and 12.71 kg mm-1 for the K3cp treatment. Under the conditions that water resources are scarce, it can be recommended that K3cp treatment is most suitable as a water application level for cucumber irrigation by drip irrigation under unheated greenhouse condition.


Onion, deficit irrigation, irrigation water use efficiency

Journal: Journal of Food, Agriculture and Environment
Year: 2009
Volume: 7
Issue: 3&4
Category: Agriculture
Pages: 239-243

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