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<p>Inadequate agricultural water management and insufficient knowledge of proper irrigation scheduling are major constraints to wheat productivity under irrigation in Ethiopia. To address these challenges, this study aimed to evaluate the effects of varying irrigation depths and intervals on wheat grain yield and water productivity in the lowland areas of Ethiopia. The study used a factorial combination of five irrigation depths and three irrigation intervals in a field experiment. The treatments were arranged in a randomized complete block design with three replications. Data collected included soil and climate parameters, plant height, and grain yield. The results revealed that both irrigation depth and interval had a significant effect on grain yield, biomass production, and water productivity. The highest grain yield (5.979 t/ha) was achieved with an irrigation depth applied at 125% crop evapotranspiration at a 7-day interval. In comparison, the lowest yield (3.498 t/ha) was recorded under irrigation depth applied at 50% crop evapotranspiration with a 14-day interval. Although the irrigation depth applied at 125% crop evapotranspiration treatment used 25% more water than the irrigation depth applied at 100% crop evapotranspiration treatment, it produced 26.75% higher yield. In contrast, the irrigation depth applied at 75% crop evapotranspiration treatment with a 7-day interval yielded 4.914 t/ha using only 2809.1&#xa0;m³/ha of water, representing a 25% reduction in water use while maintaining relatively high productivity. In regions with abundant water resources, applying irrigation depth at 125% crop evapotranspiration at 7-day intervals (4681.8&#xa0;m³/ha) is recommended to maximize wheat production. However, in water-scarce areas, using irrigation depth applied at 75% % crop evapotranspiration at 7-day intervals provides an efficient alternative, conserving 936&#xa0;m³/ha of water while maintaining satisfactory yield levels. These findings support the development of site-specific irrigation strategies to enhance wheat productivity and water use efficiency in similar agroecological environments.</p>

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Effect of irrigation regime on yield and water productivity of wheat (Triticum aestivum L.) in the lowland area of Ethiopia

  • 期刊论文

  • 出版模式：

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  • 发表日期：

    2025年10月21日

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  • Tsegaye Getachew,
  • Belihu Nigatu,
  • Demisew Getu,
  • Biruk Getaneh

摘要

Inadequate agricultural water management and insufficient knowledge of proper irrigation scheduling are major constraints to wheat productivity under irrigation in Ethiopia. To address these challenges, this study aimed to evaluate the effects of varying irrigation depths and intervals on wheat grain yield and water productivity in the lowland areas of Ethiopia. The study used a factorial combination of five irrigation depths and three irrigation intervals in a field experiment. The treatments were arranged in a randomized complete block design with three replications. Data collected included soil and climate parameters, plant height, and grain yield. The results revealed that both irrigation depth and interval had a significant effect on grain yield, biomass production, and water productivity. The highest grain yield (5.979 t/ha) was achieved with an irrigation depth applied at 125% crop evapotranspiration at a 7-day interval. In comparison, the lowest yield (3.498 t/ha) was recorded under irrigation depth applied at 50% crop evapotranspiration with a 14-day interval. Although the irrigation depth applied at 125% crop evapotranspiration treatment used 25% more water than the irrigation depth applied at 100% crop evapotranspiration treatment, it produced 26.75% higher yield. In contrast, the irrigation depth applied at 75% crop evapotranspiration treatment with a 7-day interval yielded 4.914 t/ha using only 2809.1 m³/ha of water, representing a 25% reduction in water use while maintaining relatively high productivity. In regions with abundant water resources, applying irrigation depth at 125% crop evapotranspiration at 7-day intervals (4681.8 m³/ha) is recommended to maximize wheat production. However, in water-scarce areas, using irrigation depth applied at 75% % crop evapotranspiration at 7-day intervals provides an efficient alternative, conserving 936 m³/ha of water while maintaining satisfactory yield levels. These findings support the development of site-specific irrigation strategies to enhance wheat productivity and water use efficiency in similar agroecological environments.