الفهرس 
IntroductionOnly 14 pages are availabe for public view
 |  | from | 149 |  |  |
| | | from | 149 | | |
Abstract
The objective of the present investigation was to study the impact of irrigation scheduling using pan evaporation under two planting methods, furrows and beds, on sugar beet yield and on the irrigation water productivity to find out the most suitable planting method and water treatment to optimize water use and sugar beet yield. Methods & Results: The experiment arranged in a split plot design with four replicates. The main plots were randomly assigned to the planting methods (furrows and beds), while the sub plots were subjected to three irrigation scheduling treatments which were 1.2 (I1), 1.0, (I2) and 0.8 (I3) of the cumulated pan evaporation (CPE), beside to conventional irrigation treatment (I0), which represent the farmer practices in the studied area. The obtained results of the present study concluded that irrigation scheduling at 0.8 of CPE with planting in beds is an effective method for sugar beet to maximize yield, yield quality and productivity of the irrigation water under the condition of the studied area, in north Nile delta region. Irrigation scheduling at 0.8 of CPE significantly, increased roots and sugar yield by about 22.7% and 38.2%, respectively, saved irrigation water by about 24.7% and 16.2% compared to irrigation at 1.2 and 1.0 CPE, respectively, and increased the water productivity of root and sugar yield by about 43% and 65%, respectively, compared to irrigation at 1.2 CPE. Conclusion: Using the bed planting method instead of the furrow planting one, saved water by about 743 m3/fed (25.7%) with irrigation at 0.8 of CPE and increased roots yield by about 6.9% and sugar yield by 12.2% compared to the furrow planting method. There for the bed planting method with irrigation at 0.8 of CPE, i.e., irrigation after 81mm cumulative pan evaporation (7 irrigation evince during the growing season), is recommended, for sugar beet, to optimize sugar beet yield and the productivity of irrigation water.