Abstract:
In hot and arid regions,
drought stress is considered as one of the
main reasons for yield reduction. To study
the effect of drought stress, Iron and
potassium spray on the yield and yield
components of corn, an experiment was
carried out during the crop seasons of 2010
and 2011 on Abosaeid research field of
Mahvellat as a split factorial within
randomized complete block design with
three replicates. The main plots with
irrigation factor and three levels were
considered: irrigation per 6, 9 and 12 days.
Subplots were considered with and without
Iron and potassium spray. The irrigation
reduced the grain yield in irrigation per 12
more than other stages. Irrigation effects
significantly on chlorophyll value, leaf
relative water content, stem, ear and leaves
dry weight, number grain in ear and row,
number row in ear, unfilled seed percentage
and thousand grains weight. Iron increased
the seed yield and yield component, except
unfilled seed percentage and SPAD. Using
K, as compared with control treatment,
causes the increase of grain yield, 1000
grains weight and number grain in ear 16.5,
9 and 5.5% respectively. Potassium could
somewhat reduce the impact drought stress
on corn.
