Conjunctive Effects of Supplemental Irrigation and Planting Date on Rainfed Lentil in Qazvin Plain, Iran
Publication: Journal of Irrigation and Drainage Engineering
Volume 141, Issue 12
Abstract
Rapid population increases, along with water resources deficiency, have made agricultural experts and researchers use various management techniques to improve water productivity. The term, “more crop per drop” has since came to the center of attention. One of the primary objectives in Iranian national agricultural policies is providing food security, which can be reached via this approach. There is a crucial need for improvements in production of rain-fed agriculture since there are huge rainfed cultivated areas that suffer from low yields. Hence, in this research, supplemental irrigation and sowing dates, which are two effective factors on productivity of rainfed lentils in Qazvin Plain, are investigated. The treatments included two sowing dates and four irrigation levels. The sowing dates were April 4 and April 14, and the irrigation treatments were: no irrigation, single irrigation at seedling stage, single irrigation at pod filling stage, and double irrigation at both of these stages. A factorial experiment in a completely randomized block design with three replications was conducted in agricultural research field of Imam Khomeini International University for two cropping seasons in 2011–2012. The results showed that the effects of the two factors on grain yield and biomass were highly significant at the 1% level, both separately and simultaneously. The sowing date of April 4 led to a rise in yield components. Although the double irrigation treatment with had the most grain yield, the single irrigation treatment at seedling stage with the irrigation water productivity of was the best approach when water productivity was considered. In summary, the results indicated that single irrigation at the seedling stage had better water productivity than the double irrigation treatment. This conclusion is consistent with the production functions and other research results.
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Acknowledgments
The authors would like to thank the Water Engineering Department of Imam Khomeini International University for their cooperation, especially Mr. Seyed GholamReza Babaie and Reza Saidi, and University of Tehran for supporting this research project. Also, we would like to thank our dear friends Mr. Ahmad Doosti, Saeed Sotoodehnia, and Hadi Jalghazloo for their support and help in field practices of this research and to wish them success in their lives.
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Published In
Journal of Irrigation and Drainage Engineering
Volume 141 • Issue 12 • December 2015
Copyright
© 2015 American Society of Civil Engineers.
History
Received: Jun 18, 2014
Accepted: Mar 9, 2015
Published online: May 14, 2015
Discussion open until: Oct 14, 2015
Published in print: Dec 1, 2015
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