Use of the Boron Element and its Effect on Buds and Flowers Number of Tagetes Erecta in Ahvaz Climate

Boron (B) is a necessary micronutrient for higher plants and plays a part in germination and pollen tube growth. The purpose of this research was to determine the best levels of B spray on Tagetes flowers and to study the effects these sprays had on number of flower buds and flowers in short - stemmed Tagetes . Therefore, a completely randomized design pot experiment with 3 replications was conducted that included 4 B spray treatments (the control: T 0 , 0.5 PPt: T 1 , 0.75 PPt: T 2 , and 1 PPt: T 3 ). The PPt is the abbreviation of part per thousands. Results indicated the maximum number of flower buds belonged to the T 3 , T 2 , and T 1 treatments with 67.06, 63, and 43.71% increases in the number of flower buds, respectively, compared to the control. Moreover, B sprays a t 1, 0.75, and 0.5 PPt yielded the largest number of flowers (1.55, 1.22, and 0.65, respectively). Therefore, B spray at 1 PPt yielded the best results in this research.