Effect of Amino Acids and Salicylic Acids on The Vegetative Growth Adjectives of Two Hybrids of Summer Squash (Cucurbita pepo L.)

Abstract

The experiment was carried out in the vegetable field of the Department of
Horticulture and Landscape Engineering / College of Agriculture and Forestry /
University of Mosul for the spring season 2021 to study the effect of amino acids and
salicylic acid on the growth characteristics and yield of two squash hybrids. The
experiment included three factors, represented by hybrids (Clarita and Crown), which
were placed in the main plots of the experiment, while the second factor was amino
acids and salicylic acid, with three concentrations of each (zero, 1.5 ml / l, 3 ml / l)
and (zero, 250 ppm, 500 ppm) respectively which are placed in the secondary blocks.
The results showed the superiority of the Clarita hybrid in most of the vegetative
growth traits, as well as the superiority of the main factors in all vegetative growth
traits and the number of days required for the emergence of the first female flower
under high levels of spraying. The triple interaction of Clarita cultivar under high
levels of spraying gave significant values for the same traits, with Crown cultivar
outperforming under high levels of spraying. The high spraying in the number of days
required for the emergence of the first female flower compared to the Clarita variety
under comparison with the superiority of the Crown variety in the number of female
and male flowers and the superiority of the Clarita variety in the sexual ratio as well
as the superiority of the plant grown under the high spray level of salicylic acid, while
the Crown variety under the level of Spraying 3 ml / liter and 500 ppm had the lowest
values in the sex ratio of the plant compared to the crown cultivar under comparison
and the spray level was 250 ppm.