EFFECT OF PLANTING DEPTH AND GIBBERELLIC ACID SPRYAING ON GROWTH, FLOWERING AND BULBS PRODUCTION OF Lilium longiflorum L

Abstract

Field experiment was conducted in a plastic house, Department of Horticulture and landscaping, Faculty of Agriculture, University of Tikrit during the season 2012-2013, to know effect of planting depth and spraying gibberellin in vegetative, flowering growth and bulbs Lily production, designed with Complete Randomized Block Design included two factors: planting depths with three levels 8, 10 and 12 cm and three concentrations of spraying gibberellin zero, 50 100 mg liter -1. Planting depth of 12 cm cause a significant increase in plant height and gave the highest of plant height was 83.21 cm, treatment of spray gibberellin 100 mg Liter-1 caused increase in flower diameter gave 18.05 cm, highest vase life 15.91 day for interaction treatment between the planting depth of 12 cm and spraying gibberellin concentration of 100 mg l-1.