A field experiment was conducted at the agricultural research station, to study the effect of planting dates (three spring dates: February 15, March 1, and March 15), and spray with boron at three concentrations (0, 20, and 30 mg L-1, and 10) on the inflorescence traits of the sweet leaf plant (Stevia). The results showed some floral vital parameters superiority, especially the anthesis date, number of inflorescences on the plant, inflorescence diameter, pollen viability percentage (in-vitro), pollen germination percentage of (in-vitro), and boron concentration in the flower ovary (221.00 days, 3963 inflorescences.plant-1, 7.922 mm, 91.67%, 47.33%, and 51.10 mg L-1, respectively). It could be conclude from this study the significant impact of changing planting dates and boron concentrations on anthesis dates, pollen vitality, fertility percentages, and seeds produced, as inflorescence parameters increased with delaying planting dates to mid-March and increasing boron concentrations
INFLORESCENCE TRAITS OF STEVIA REBAUDIANA BERTONI AFFECTED BY PLANTING DATE AND FOLIAR BORON APPLICATION
Stevia rebaudian Bertoni
حيوية حبوب اللقاح
نسبة الخصب
درجات الحرارة
المغذيات