Research article

SPRAYING EFFECTIVENESS WITH GIBBERELLINS, SALICYLIC ACID AND HUMIC ACID ON GROWTH CHARACTERISTICS AND YIELD OF SOME WHEAT CULTIVARS

Ziyad Khalaf Rashid Mohammed

Online First: November 30, 2022


In this study, three wheat cultivars (Triticum aestivum L.) were planted in the agricultural fields of the city of Shirqat during the growth season (2020-2021), where the seeds were planted for the three cultivars of wheat (Sham 6, Ebaa 99 and Adana 98) in pots , and upon reaching the stage of (3-5) leaves were exposed to spraying with three plant growth regulators, gibberellin, salicylic acid and humic acid. Spraying with growth regulators was done with (L/150 mg) to find out which type of them is more effective than the rest, as well as to determine which of the varieties is more responsive to growth regulators by measuring growth characteristics and yield components. The results of the study showed that spraying with gibberellin acid was superior on salicylic acid and humic acid for all the studied traits, and with regard to the cultivars, the cultivar Adana 98 outperformed on Sham6 and Ebba 99 in its response to growth regulators, especially gibberellin in the traits (total chlorophyll content, flag leaf area, plant height, dry weight, length spike, number of grains in the spike, and biological yield), while Sham6 cultivar outperformed in its response to growth regulators, especially gibberellin for the following traits (weight of 1000 grains, grain yield, and harvest index), and it was found that spraying with gibberellic acid significantly affects on all studied traits except the dry weight.

Keywords

gibberellin acid , drought , Sham6 , Ebaa 99 , Adana 98.