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Iranian Journal of lrrigation and drainage
No. 2, Vol. 6, Summer 2012, p. 69-77
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76
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Iranian Journal of lrrigation and drainage
77No. 2,...dˀË|»
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Vol. 6,{Summer
2012,
69-77 . ,1391 ½Zfˆ]Ze ,6|¸m ,2 ÃZ¼‹
Improvement in water use efficiency of drip irrigated corn in arid region
N. Kohi Chelekeran1*, H. Dehghanisanij2, R. Asadi3
Abestract
Limited water resources, shows the need for efficient use of water in agriculture. In this study to evaluate the
impact of water rates based on soil moisture levels on yield of maize. Experiment was conducted in a split plot in
randomized complete block design with three replications in Kerman Agriculture and Natural Resources
Research Center (Jupar region) during 2008-2010. Four irrigation treatments were conducted including net crop
water requirements (control treatment) and 3 treatments, of 1.2FC, 1.5FC and 1.8FC. The FC was measured
using installed Tensiometer in each treatment. Irrigation interval in control treatment was calculated by FAOPenman-Montheith model. The product yield, applied irrigation water, irrigation water consumption, water use
efficiency, yield components and some measure of economic benefit to cost ratio were evaluated. Results
showed the yield of maize was consistent with the reduced volume of irrigation. Accordingly, corn yield in
control treatment was 8.5, 29 and 37 percent was higher compared to 1.2FC, 1.5FC and 1.8FC irrigation
treatments, respectively. It is while, applied irrigation water increased 8.5, 13.5, and 17 percent compared to the
control treatment. As a result, corn water use efficiency was equal in control and 1.2FC treatments. Irrigation
frequency for the control treatment through was 2 days interval and that was obtained for other treatments based
on Tensiometer monitoring and ranged from 3 to 8 days. Economic comparison confirmed superior control
treatment and treatment 1.2FC compared to other treatments.
Keywords: Drip irrigation (Tape), deficit irrigation, soil water balance, tensiometer, corn.
1- Kerman Agriculture and Natural Resources Research Centre, Kerman, Iran
(* - Corresponding Auther Email: nakc[email protected])
2- Assisstant Professor, Irrigation and Drainage Department, Agricultural Engineering Research Institue, Karaj, Alborz,
Iran. P.O.Box 31585-845
3- Young Researchers Club, Kerman Branch, Islamic Azad University, Kerman, Iran