Effect of Spraying with Growth Regulators Brassinolide and Thidiazuron on the Chemical Content of Leaves and Pods of Three Okra Hybrids Under Protected Cultivation Conditions

Abstract

The study was conducted in one of the greenhouses in the research station in Al-Bu’itha area of the College of Agriculture - University of Anbar during the growing season 2021-2022 to investigate the effect of spraying the growth regulators Brassinolide (BR) (0, 0.1 and 0.2 mg L−1) and Thidiazuron (TDZ) (1 and 2 mg L−1) were found, respectively, in the chemical content of leaves and pods of three hybrids (Abeer, Lotus and OkraF1). The results showed that the two treatments spraying Brassinolide at a concentration of 0.2 mg L−1 and spraying TDZ at a concentration of 2 mg L−1 were superior in all studied traits, while the hybrid Abeer was superior to the rest of the hybrids in the percentage of nitrogen 3.449%, phosphorus 0.416% and potassium 1.722%, carbohydrates 4.535%, the percentage of nitrogen in the pods 3.427%, and protein 21.42%. The interaction between the factors of the study had a positive effect on all the studied traits.