Effect of treatments with humic substance, potassium and boron on the flower gualities of two varieties of Gerbera under protected conditions

Abstract

This research was carried out in a private nursery in Damascus during the spring of 2017, in order to study the effect of the treatments of humic substance adding to the growing media and the spraying of potassium and boron on some flowering characteristics of two varieties of Tamara and Rugiada during the first three months of the growing season. The results showed a significant promotion of the treatment of 1 g / l in humic substance on the length of flower stem in Tamara (60.25 cm) compared to 49 cm for control flowers, number of flowers / plant in Rugiada (3.5 flower/plant) versus 2 flower /plant For the plants of the control. In addition to the increment of weight (30 g) and diameter (11.89 cm) of the flower in Tamara. The treatment with humic substance and potassium spraying improved the flowering properties of both Tamara and Rugiada. No significant differences were noticed due to boron treatment at the concentration of 0.5 g / l on the vegetative growth. The weight and number of flowers were significantly increased when the growth medium was mixed with humic substance and sprayed with potassium for both Varsities.