Two field experiments were performed at the Experimental Farm of Faculty of
Agriculture, Zagazig University. in Khatlara. Sharkia Governorate, during 2003 and
2004 growing seasons to study the effect of soil moisture stress (no stress. stress
during reproductive growth, stress during vegetative growth and stress during both
stages) on yield and its attributes of three mrize hybrids (SC 10. SC 18 and TWC
310).
Results indicated that water stress all over maize growing season (it) or only at
reproductive stage (l2) significantly reduced plant height. ear length, ear diameter.
number of grainslrow. number of grainsr‘ear and grain yieldlfad compared with control
(it) and water stress at vegetative growth (is).
The single cross 10 (SC 10) surpassed significantly the other hybrids in plant
height. ear leaf area. number of grains/row, ‘lOO-grain weight and shelling °/a.
Meantime SC 10 gave more yield than TWC 310, while SC 13 hybrid was statistically
at par with the two hybrids.
The interaction effects showed that SC 10 was more sensitive for water stress
during the late gross stage than the other two hybrids.