Impact of some growth regulators on growth and productivity of broad bean plant grown under Upper Egypt conditions

Ahmed, A. M. O.; Abd-El-Rameem, G. H.; AbdAllah, M. A. A.

doi:10.21608/aasj.2025.455381

Impact of some growth regulators on growth and productivity of broad bean plant grown under Upper Egypt conditions

Document Type : Research article

Authors

Department of Horticulture, Faculty of Agriculture, Al-Azhar University, Assiut, Egypt

10.21608/aasj.2025.455381

Abstract

Two filed experiments were conducted at winter successive two seasons of 2020/2021 and 2021/2022 in the private Farm of Al-Wastta village, All- Fatah center, Assiut Governorate, Egypt. The experiments were carried out to study the effect of some growth regulator concentrations treatments on productivity of broad bean (Vicia faba L.) plants under Assiut Governorate conditions. The experiment was laid out in split plot design with three replicates. Growth regulators GR (salicylic acid (SA), gibberellic acid (GA) and naphthalene acidic acid (NAA)) were put in the main plot, while the concentrations (25, 50 and 75 ppm) were allocated in sub-plot. The results show that all applications of GR and concentrations increased all vegetative characters (i.e., plant height, number of branches and leaves) as well as, yield and its components (i.e., number of pods / plant, number of seeds / pod, pods weight / plant (g), number of pods / plot, pods weight / plot (kg), pod weight (g), pod height (cm), plant fresh weight (kg) and total yield (ton / feddan (4200 m²)) of all studied broad bean, comparing to untreated plants. The results also show the protein % in broad bean seeds were increased by increasing all GR concentration under the study in both seasons. Foliar application by NAA at a rate of 75 ppm gave the maximum protein values: 28.43 and 28.89% in both seasons, respectively. In conclusion, a superiority effect happened on all parameters under study for the plants treated with NAA following with GA and lastly SA as compared to control treatment. Generally, the most suitable treatment, which realizing the highest yield of broad bean seeds and protein % was connected with the treatment of 75 ppm of NAA.

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