|Author:||El-Tantawy, M. M. ; Ouda, S. A. ; Khalil, F. A.|
|Book Group Author:||NA|
Two field experiments were conducted at Giza Agricultural Research Station, Agricultural Research Center, Egypt during the two successive seasons of 2005 and 2006. The objectives of this research were: (i) to study the effect of scheduling irrigation using three different pan evaporation coefficients on maize yield and its components; (ii) to determine the most important yield components of maize using different statistical procedures. Irrigation treatments were irrigation using 1.2, 1.0, and 0.8 pan evaporation coefficient devoted to control, about 7% reduction in irrigation water than the control, about 14% reduction in irrigation water than the control, respectively. Actual evapotranspiration and water use efficiency were estimated. Simple correlation coefficients analysis, multiple linear regression analysis and principle components analysis were used to determine the most important yield components. Analysis of variance revealed that all the studied characters were significantly affected by irrigation treatments over the two growing seasons, except for number of rows/ear for both growing season and number of grain/ear in 2005 growing season. Results also showed that under irrigation with 1.0 pan evaporation coefficient maize yield was reduced by 6.15 and 8.05% in 2005 and 2006 growing seasons, respectively. Furthermore, maize yield was reduced by 36.07 and 35.97% under irrigation with 0.8 pan evaporation coefficient for 2005 and 2006, respectively. The highest consumptive water used was obtained under irrigation with 1.2 pan evaporation coefficient i.e. 5894 and 6170 m3/ha for the first and second season, respectively. Whereas, the highest water use efficiency was obtained under irrigation with 1.0 pan evaporation coefficient in 2005 growing season and in 2006 growing season, the highest water use efficiency was obtained under either irrigation with 1.2 pan evaporation coefficient or 1.0 pan evaporation coefficient. Therefore, to increase water use efficiency and to save irrigation water, it could be recommended to irrigate maize using 1.0 evaporation pan coefficient under middle Egypt conditions. Simple correlation coefficients analysis revealed that ear length, ear diameter, number of grains/ear and 100-grain weight were positively and significantly correlated to maize grain yield. Multiple linear regressions analysis indicated that three characters were found positively and significantly correlated with maize yield i.e. grain weight/ear, number of grain/ear and 100-grain weight. Whereas, results of principle components analysis over the two growing seasons showed that ear length and grain weight/ear accounted for 69.07% of the total variation. Therefore, it is recommended to select for ear length and grain weight/ear in the breeding programs.
|Pages:||456 - 462|
|Journal:||Research Journal of Agriculture and Biological Sciences|
crop yield, irrigation, maize, plant water relations, wateruse efficiency, yield components, Egypt, Zea mays, North Africa, Africa,Mediterranean Region, Middle East, Developing Countries, Zea, Poaceae,Cyperales, monocotyledons, angiosperms, Spermatophyta, plants,eukaryotes, corn, watering, Field Crops (FF005) (New March 2000), PlantWater Relations (FF062), Plant Production (FF100), Soil Water Management(Irrigation and Drainage) (JJ800) (Revised June 2002) [formerly SoilWater Management]