Abstract:
In order to evaluate the effect
of irrigation interval on yield and
quantitative-qualitative characteristics of
bread wheat, splited plot experiment in
randomized block with four replications in
the 2010-11 crop years was conducted in the
research field of Islamic Azad University of
Gonabad. A number of 7, 9 and 10 days
irrigation treatments formed the main
factors of test, and spraying and nonspraying
of nitrogen and zinc were
considered as subfactor of test. The results
showed that the effect of irrigation was
significant for the number of grains per
spike in the level of 5% and on 1000-grain
weight and fat percent at the level of 1%,
and had no significant effect on grain yield,
biological yield, number of spikes/sq m
stem height, stem diameter and protein
content. Nitrogen treatment was significant
at the level of 5% on biological yield and
number of spikes/sq m, but had no
significant effect on grain yield, number of
grains per spike, 1000-grain weight, stem
height, fat and protein percent, and stem
diameter. Treatment with zinc was
statistically significant in probability level
of 1% only on percentage of fat and had no
significant effect on grain yield, biological
yield, grain numbers per spike, weight of
1000 seeds, spikes/sq m, stem height,
protein percent and stem diameter. Seven
days irrigation with of nitrogen allocated for
highest seed yield (265.38 g/m²/sq m) and
biological yield (659.33 g/m²/sq m). Means
comparison showed the highest 1000-grain
weight was obtained from 7 days irrigation
(47.10 g) and the lowest from 13 days
irrigation (40.44 g). According to the
experiment results, 7 days irrigation was
recognized as the best irrigation to achieve
maximum economic performance and 13
days irrigation were determined as most
appropriate irrigation for maximum
performance for the region due to lack of
water and weather conditions of Gonabad,
spraying zinc and nitrogen to improve
production was proposed depending on
different irrigation and the purpose of
production.
