EFFECT OF GROWTH REGULATOR INDOLE-3 BUTYRIC ACID AND AGRICULTURAL MEDIA TO PROPAGATION OF Hibiscus rosa - sinensis L. CUTTINGS UNDER PROTECTED ENVIRONMENT CONDITIONS

Abstract

This experiment was carried out in green house of Department of Horticulture and Garden Engineering, College of Agriculture, University of Anbar for the period from 1/4/2018 to 1/11/2018 at study the effect of the growth regulator Regulator Indole-3 butyric acid (IBA) on concentrations of 0, 1500, 3000, 4500 mg. L-1 and the agricultural media of sand, sand with peatmoss 2: 1, sand with poultry litter 3% to propagation the cutting of Hibiscus Rosa-sinensis L. Plant. By using a stem cutting and hard wood, this study according to carried out as Factorial Experimental with a Complete randomized design (CRD) 4 x 3. It included 12 experimental units with three replicates of 20 cutting in each experimental unit and means were compared using L.S.D test on 5% probability. The results showed the following. The results showed that immersion of cutting in concentrations of IBA achieved a significant increase in rooting ratios and a superior concentration of 4500 mg. L-1, giving the highest rooting rate of 90.00%, while the comparison treatment recorded the lowest rate of 36.67%. The concentrations achieved 4500 mg. L-1 significant increases for all charachters in this study including: mean of number, and diameter of root, mean number and area of leaves, height of plant, content of leaves from NPK reached of 24.00 root.cutting-1, 5.31 mm.root-1, 73.74 leaf. Trans plant-1, 7264.70 cm2. Trans plant-1, 81.89 cm. Trans plant-1, 2.10%, 1.77%, 0.55%, respectively. While, the control treatment gave the lowest value of 5.33 root.cutting-1, 1.62 mm.root-1, 45.15 leaf. Trans plant-1, 3534.52 cm2. Trans plant-1, 60.19 cm. Trans plant-1, 1.92%, 1.73%, 0.53 %, respectively. The treatment of the agricultural media /sand with poultry litter 3%/ have a significant effect on all the characters compared to the other media of 19.42 root.cutting-1, 5.49 mm.root-1, 111.00 leaf. Tran's plant-1, 13886.16 cm2. Trans plant-1, 110.08 cm. Trans plant-1, 2.17%, 1.78%, 0.57%, respectively. But, the control treatment gave lowest value of 13.58 root.cutting-1, 2.42 mm.root-1, 32.64 leaf. Trans plant-1, 1025.78 cm2. Trans plant-1, 45.92 cm. Trans plant-1, 1.89%, 1.71%, 0.52%, respectively. The interaction of the study factors significantly affected the root and vegetative characters of plants after six months of cultivation. The interaction between of IBA concentration 4500 mg-1 and media sand with poultry litter 3% significantly exceeded the other treatments by giving the highest rates of the previous studied.