EFFECT OF NPK, POTASSIUM SILICATES APPLICATION AND MAGNESIUM SPRAY IN ROSE PLANTS

A study was carried out on rose's transplants, orange-colored Wiener Charme variety, one and a half years old, in one of lath house of research station (B) belong to Department of Horticulture and Landscape Engineering / College of Agricultural Engineering Sciences / University of Baghdad, in spring and autumn seasons of 2022, and an experiment was carried out. A three-factor factorial within a randomized complete block design (RCBD). Factors included chemical fertilization (NPK) without fertilization (C0), fertilization at 100% of fertilizer recommendation (C100), and addition of potassium silicate at three levels; 0 (S0) 200 mg.L-1(S200) 300 mg.L-1 (S300). Third factor was foliar spraying with Disper Mg solution as a source of magnesium (M) at concentrations of 0 (M0) 0.75 g.L-1 (M0.75) and 1.5 g.L-1 (M1.5). Results showed that triple interaction (C100M1.5S300) excelled in vegetative traits for two seasons of study with highest increase in leaves number, leaves area and leaves carbohydrates content (106.50-113.50 leaves, 46.92-67.76 dm2 and 9.84 - 8.52%) respectively, same treatment also excelled in vase life, anthocyanin pigment, and total sugars (6.50 - 7.00 days, 274.8-311.3 mg.100 g, and 9.31– 10.17% ) respectively.