|Author:||Ibrahim, M. E. ; Abdel-Aal, S. M. ; Seleiman, M. F. M. ; Khazaei, H. ; Monneveux, P.|
|Book Group Author:||NA|
Irrigation is the most important factor in determining bread wheat (Triticum aestivum L.) yield in Egypt. The effects of different water regimes were investigated during two years on growth and yield components of the cultivar Gemmeiza 9 cultivated under three and four irrigations at 30 days interval, and five and six irrigations at 25 days interval. Grain filling rate and effective grain filling period were also calculated for each treatment. Significant effects of the water regime were found on all measured traits. However, increasing the number of irrigations from five to six, keeping the same interval of time between irrigations, did not significantly increased grain yield, harvest index, number of tillers and spikes per m2, spike length and fertility, thousand kernel weight and grain weight per spike. The grain production obtained by irrigation (or irrigation efficiency) was similar under three and four irrigations at 30 days interval but drastically decreased under five and six irrigations at 25 days interval. For the number of tillers and spikes per m2 as well as for grain yield, gains decreased with each additional irrigation, up to three irrigations. Conversely, for the number of grain per spike and to a lesser extent for thousand kernel weight, the highest gains were noted when both the number and frequency of irrigation increased, i.e. when the crop was irrigated five times at 25 days interval, rather than four times at 30 days intervals. The study emphasizes the importance, for irrigated wheat, to define irrigation timing and frequency that allow maximal yield and optimal use of irrigation water.
|Pages:||5 - 9|
|Journal:||Wheat Information Service|
crop yield, cultivars, filling period, harvest index,irrigation, irrigation scheduling, irrigation water, kernels, plantwater relations, spikes, tillers, water use efficiency, wheat, yieldcomponents, Egypt, Triticum, Triticum aestivum, North Africa, Africa,Mediterranean Region, Middle East, Developing Countries, Triticum,Poaceae, Cyperales, monocotyledons, angiosperms, Spermatophyta, plants,eukaryotes, cultivated varieties, Misr, watering, Field Crops (FF005)(New March 2000), Plant Water Relations (FF062), Plant Production(FF100), Soil Water Management (Irrigation and Drainage) (JJ800)(Revised June 2002) [formerly Soil Water Management]