Two field experiments were conducted at the Experiment and Research Center,
Fac. Agric., Moshtohor, Benha Univ., Kalubia Governorate, Egypt, during the two growing
seasons 2010/11 and 2011/12 seasons, to study the effect of fiveskipping an irrigation attillering
stage, elongation stage, heading stage, milk stage and filling stage on yield and chemical
propertiesof fivebread wheat cultivars (Giza 168, Sakha94, Gemmaza 9, Sids13 and Misr1).
The obtained results were as follows:
Skipping an irrigation at tillering, elongation and heading stages decreased flag leaf area, plant
height, number of spikes m-2, 1000-kernel weight, grain yield and straw yield compared with
skipping irrigation at filling stage treatments. Moreover,skipping irrigation at tilleringstage was
earlier heading compared with other skipping irrigation treatments.
Wheat cultivars were significantly different in all traits studied. Gemmaza 9 cultivar gave the
highest values of flag leaf area, plant height, spike length, No. of spikelets spike-1, No. of spikes
m
-2, seed index, grain yield and straw yield, also Gemmaza 9 cultivar was earlier heading(89.67
day) compared with other wheat cultivars.
Significant effect of interaction between skipping irrigation and wheat cultivars was obtained for
all growth, yield and yield components except seed index. Skipping irrigation at tilleringstage for
Gemmaza 9 cultivar gave the highest value of No. of spikelets spike-1 and surpassed the other 4
cultivars in early heading. While, skipping irrigation at milkstage for Gemmaza 9 cultivar gave
the highest values of spike length and No. of spikes m-2. Moreover, skipping irrigation at
fillingstage for Gemmaza 9 cultivar gave the highest values of flag leaf area, plant height, grain
yield fed-1and straw yield fed-1
.
Skipping an irrigation at milk and filling stages decreased moisture, fat and carbohydrate
contents,whereas, the same two treatments gave the highest values of protein, ash and fiber
contents in wheat kernels compared with other irrigation treatments.The lowest values of
moisture and charbohydrate contents were obtained by Giza 168 cultivar and also, the same
cultivar gave the highest value of protein content,while, Sids 13 cultivar gave the highest value
of ash content, Sakha 94 cultivar gave the highest value of fiber content and Misr 1 cultivar
gave the highest value of fat content and in wheat kernals.
Skipping irrigation at filling stage for Giza 168 cultivar gave the lowest values of moisture and
carbohydrate contents, also, the same treatment gave the highest value of protein content in
wheat kernels. While, skipping irrigation at milk stage for Sids 13 cultivar gave the highest value
of ash content and skipping irrigation at filling stage for Sids 13 cultivar gave the highest value
of fiber contents. Whereas, skipping irrigation at milk or tillering stages for Giza 168 or
Gemmaza 9 cultivars gave the highest value of fat content. |
