The Importance of Amino Acids and Salicylic Acids for The Yield 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 plots.
The results showed the superiority of the hybrid Crown over the hybrid Clarita in the
number of fruits per plant, while the hybrid Clarita outperformed the hybrid Crown in
the early yield. The plants grown under the high level of salicylic acid excelled in the
characteristics of the number of fruits, fruit weight, early yield, total and non-market
yield compared with no spraying with acid. Plants grown under high levels of amino
acid in the characteristics of plant yield, total yield and marketing yield in comparison
with plants not treated with acid.