Two field experiments were carried out at Mallawi Agricultural Research
StaUon, EI·Menya govemorate, to study the effect 01 drought conditions (holding
ir~g8Uon atter 3 and 4 irriagations) at late growth stages comparing to full irrigation
treatment (six irrigations) on grain yield and its components during the two successive
growing seasons 2000/200i and 2001/2002.
water consumptive use WCU and water use efficiency WUE were calculated
for the five bread wheat cultivars (Giza 164, Giza 188, Sids 1. Gemmiza 9 and Sakha
93) were also calculated. The most important findings could be summarized as
follows:
. Water stress at late growth stages reduced grain yiefd by 6.96 and 15.04 % and
blolQgical yield by 8.5 and 8.5 % compared with non stressed plants similary some
trails Of wheat.
. Exposing wheat to drought at late growth stages reduced the total water consumed
WCU trom 2291 to 1741 and 1312 m3 1.40 and
1.71 to 2.08 kg Iml. Sicis 1 followed by Giza 168 gave the highest WUE followed by
Gemm!za 9 and Giza 164 at the same time Ihe lowes I value was obtained form
Sakha 93.
- The results Indicated that Giza 164 followed by Sakha 93 and Gemmiza 9 cullivars
were drought resistance more Ihan Sids 1 and Giza 168 cultivars under Middle
Egypt conditions.