Irrigation management of plastic house cucumbers
1990
Oweis, Th.Y. (Jordan Univ., Amman (Jordan))
The cucumber yield response to different levels of irrigation under plastic house conditions was studied in Central Jordan Valley. A drip irrigation system was used to apply four water treatments of 40%, 60%, 80% and 100% of the crop potential water requirements. Weekly transpiration was determined and Crop-pan coefficients (Kcp) were developed. The irrigation production function was found to be quadratic. A max yield of 946 tons/hectare (t/ha) was produced with 223 millimeters (mm) of water consumed as transpiration. The Water Use Efficiency ranged from 0.38 to 0.50 t/ha-mm. Kcp increased from about 0.14 at planting to over 0.5 in midseason, and dropped to 0.30 at the end of the season. The derived irrigation production function and crop coefficients are the basis for determining irrigation amount and schedules for optimal production of cucumber in plastic houses. Such relationship can also help in the development of sound national water policies
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