ISHS Acta Horticulturae 747: VIII International Symposium on Protected Cultivation in Mild Winter Climates: Advances in Soil and Soilless Cultivation under Protected Environment
RESPONSE OF ASIATIC LILY (LILIUM × HYBRIDA) 'ZSA ZSA' TO CONCENTRATION OF UREA IN A CLOSED SOILLESS CULTURE |
| Authors: | B.H. Daood, N.S. Karam |
| Keywords: | Lilium × hybrida, recycling, black tuff, urea |
| Abstract:
Performance of 'Zsa Zsa' lily was evaluated in a closed soilless culture in response to urea concentration (296, 456, 616 or 776 mg•L-1) in the nutrient solution. Stem height, shoot and root weight, and peduncle length decreased with increasing urea up to 616 mg•L-1, then leveled off. Urea above 296 mg•L-1 reduced flower bud count by one bud. Bud length and weight decreased as urea increased. Tissue N, P, Na, Cl, Mg, Mn, Cu, and Mo were not affected. The highest tissue K was recorded for 296 mg•L-1 urea. Application of 296 or 456 mg•L-1 urea increased tissue Ca and reduced Fe and Zn. The supply solution N and NH4+ were lower for 296 or 456 mg•L-1 urea. Increasing urea increased EC and K. The highest Na was recorded for 616 or 776 mg•L-1 urea and the highest Ca for 776 mg•L-1. | |
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