THE EFFECT OF SOME TREATMENTS ON THE FLOWER GROWTH CHARACTERISTICS OF TWO VARIETIES OF HYACINTHUS ORIENTALIS L. PLANT

Abstract

The experiment was carried out in the wooden canopy of the Department of Horticulture and Landscape Design/College of Agriculture and Forestry/University of Mosul during the agricultural season (2023-2024). To study the effect of spraying with different concentrations of calcium chloride (0, 500, 1000) mg L-1 and spraying with gibberellic acid at concentrations of (0, 100, 200) mg L-1 and the interaction between them on vegetative and flowering growth and the yield of bulbs and bulbs for two types of bulbs of the hyacinth plant, Hyacinthus orientalis L. They are ″Carnegie‶ with white flowers and ″Fondant″ with pink flowers. The study was implemented using a factorial experiment in a randomized complete block design (R.C.B.D.) in split plots With three replicates and 8 plants per replicate. The results indicated that the white variety recorded the largest values in the fresh weight of the flower bud, 42.799 grams, and the largest length of the flower bud, 20.935 cm, while the plants of the pink variety recorded the fewest days in the period required for the flower bud to appear, and the fewest days in the period required for the color to appear on the flower bud, 29,038 days. The largest number of flower stalks is 1,515 stalks per plant, and the largest value in estimating total chlorophyll in leaves is 28,798%.