Drainage lysimeter based measurement of water requirement and crop coefficient of bread wheat under semi-arid climate of Melkassa, Ethiopia
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Summary
This summary is machine-generated.Accurate evapotranspiration measurement is key for sustainable agriculture. This study determined wheat water needs and crop coefficients in Ethiopia, aiding efficient irrigation management.
Area Of Science
- Agricultural Science
- Hydrology
- Agronomy
Background
- Efficient water management is critical for sustainable agriculture amid climate change and increasing food demand.
- Accurate evapotranspiration data is vital for determining crop water needs and optimizing irrigation systems.
Purpose Of The Study
- To investigate the water requirements and crop coefficients of the Kingbird wheat variety in Ethiopia.
- To develop a predictive model for crop coefficients based on crop growth stages.
Main Methods
- Utilized a drainage lysimeter and neutron probe at Melkassa Agricultural Research Center.
- Monitored soil water balance and measured crop evapotranspiration (ETc) and reference evapotranspiration (ETo).
- Determined crop coefficients (Kc) for different growth stages of wheat.
Main Results
- Average ETc was 427.28 mm, with a water requirement of 4273 m³ per hectare.
- Average crop coefficients (Kc) were 0.43 (initial), 0.93 (mid-season), 1.15 (late-season), and 0.30 (end).
- A fifth-order polynomial function was developed to predict Kc based on days after sowing.
Conclusions
- The study provides crucial crop coefficient values for optimizing irrigation scheduling in semi-arid regions.
- Findings enhance the design and management of irrigated wheat production, improving water-use efficiency.
- Results contribute to sustainable wheat cultivation practices in water-scarce environments.
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