Abstract
Water scarcity is a major constraint for the production of food in arid and semi-arid areas. Therefore, deficit irrigation and application of irrigation systems are important concerns to improve water use efficiency without significant yield loss. The objective of an experiment was evaluating the performance of furrow irrigation systems under different water application levels on onion yield. The treatments were three deficit irrigation levels of 50%, 75% and 100% of ET C with three furrow irrigation systems and laid out a factorial RCB design with three replications. The highest bulb yield and water use efficiency were obtained from CFI 100% and AFI 100% respectively. Bulb yield of CFI 100%, CFI 75%, and AFI 100% were not shown a significant difference which is 25.46 ton/ha, 24.88 ton/ha, and 24.54 ton/ha respectively, besides better water use efficiency of 8.39 kg/m 3 was recorded from AFI 100%. In relative to the control, AFI 100% able to increase 0.868 ha net additional irrigable land per each hectare. Therefore, it can be decided that Alternative furrow irrigation with 100% ET C increased water use efficiency and can solve a problem of water shortage. Keywords : Alternate Furrow; Crop Water Requirement; Deficit Irrigation; Onion; Water Use Efficiency DOI : 10.7176/IEL/9-5-03 Publication date :June 30 th 2019
Highlights
Land and water scarcity are major constraints for the production of food required to satisfy the quantitative and qualitative shifts of the world’s demand in the mid-twenty-first century
The deficit irrigation could be considered as a way of maximizing water use efficiency (WUE) by applying a reduced amount of irrigation water, which has no significant impact on yield
Based on ETO and KC value, the seasonal crop and irrigation water requirement were found to be 516.42 mm and 482.35 mm, respectively, this amount needed for full irrigation level treatments (CFI 100%) (Table 2)
Summary
Land and water scarcity are major constraints for the production of food required to satisfy the quantitative and qualitative shifts of the world’s demand in the mid-twenty-first century. Irrigation will, play an increasingly important role and in the future both to increase the yield from already cultivated land and to permit the cultivation of what is today called marginal or unusable land due to moisture deficiency. As they reported mechanisms which increase the water productivity of the irrigation scheme should be introduced. The amount and distribution of rainfall are not sufficient to sustain crop growth and development in the study region For this reason, river and groundwater are used as a source of irrigation water. This study aimed to investigate the performance of alternate furrow irrigation, fixed furrow irrigation and conventional furrow irrigation system on onion yield in the Lower Awash valley
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