The effect of some Levels of Shading and Fertilization in the Growth and Production of Commercial Cut Flowers of Two Cultivars of Shrubby Roses

Abstract

An experiment was carried out in one of the plastic houses of the Department of Horticulture and Date Palms in Baghdad Governorate during the year 2021 of the autumn season. The effect of some levels of shading and fertilization on the growth and production of commercial cut flowers of two cultivars of shrubby roses on some characteristics of vegetative and flowering growth. The results showed a significant superiority among the cultivars, as cultivar V1 was superior to cultivar V2 in average plant height and flower diameter, while cultivar V2 had a significant superiority over cultivar V1 in average number of leaves, number of petals and flower stem length. While the characteristics of vegetative growth represented by the rate of plant height, the number of leaves, and the characteristics of floral growth represented by the flower diameter, the number of petals, and the length of the flowering stem were significantly superior when using shading levels 50% (S2) and the levels of fertilization consisting of mycorrhiza, licorice extract and chelated iron (F3) in all growth characteristics.