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ISSN: 2360-7874 |
Academic Research Journal of
Agricultural Science and Research |
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Vol. 7(5), pp. 289-296, July 2019 Research Determination of
Optimal Irrigation Scheduling and Water Productivity for Wheat (Triticum
aestevum L.) at Kulumsa, Arsi Zone, Ethiopia
The study was conducted at Kulumsa Agricultural Research Center, Arsi zone, Ethiopia, for Two consecutive years (2015/16 and 2016/17) based on the objective to evaluate the response of crop to irrigation regime (when and how much) and determine the crop water requirement and water productivity of wheat. The experiment was arranged in a Randomized Complete Block Design (RCBD) with three replications. Five level of irrigation scheduling were arranged for the study based on their level of soil moisture depletion (60%, 80%, 100%, 120% and 140% of Allowable Soil Moisture Depletion Level (ASMDL)). The study result revealed that, the variation of soil moisture depletion level from 60% to 140% of the FAO recommendation had no effect on plant heights, Hectoliter weight, total kernel weight and harvesting index. Grain yield, above ground biological yield and water productivity of wheat had statistically significant difference at (P<0.05) level. Maximum wheat grain yield of 4,959 kg/ha was obtained at 60% of ASMDL. The maximum grain yield obtained at 60% of ASMDL was statistically similar with control 100% ASMDL treatment and the minimum grain yield of 3,823 kg/ha recorded at 140% of ASMDL. Maximum above ground biological yield of 10,734kg/ha was obtained at 60% of ASMDL, however this result was statistically similar with control treatment. The minimum above ground biological yield of 8,555kg/ha was recorded at 120% of ASMDL. Maximum water productivity of 1.17kg/m3 was obtained at 60% of ASMDL which was statistically similar with control treatment and the minimum water productivity of 0.98kg/m3 was recorded at 140% of ASMDL. Since the grain yield and water productivity of 60% of ASMDL and 100% of ASMDL were not significantly different to each other, the control treatment (100% of ASMDL) had recorded longer irrigation interval when compared to 60% of ASMDL. Therefore, irrigation scheme could be used FAO 33 ASMDL recommendation for wheat production at the study area in similar agro-ecology and soil type.
Keywords: irrigation scheduling, wheat, soil moisture depletion, water productivity
How to cite this article (APA Style): Samuel L., Bakasho I., Mehiret H., Kassu T., Wubengida A. (2019). Determination of Optimal Irrigation Scheduling and Water Productivity for Wheat (Triticum aestevum L.) at Kulumsa, Arsi Zone, Ethiopia. Acad. Res. J. Agri. Sci. Res. 7(5): 289-296
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