CARNATION (Dianthas caryophyllus) PLANT RESPONSES TO NITROGEN FERTILIZATION

(Mahmoud Siraj-Ali)

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Abstract

A pots experiment was conducted in a greenhouse at the Experimental Station of King Faisal University, Al-Hassa, Saudi Arabia in 1995 and 1996 to determine the effect of nitrogen fertilization on vegetative growth, flowering and nitrogen partitioning in carnation plants. Carnation plants were grown in pots on 6 Oct. 1995 and 8 Oct. 1996. The pots are large plastic cans contain 130 liters of soil each.  The soil consists of 10% silt, 40% sand and 50% peat moss. Carnation plants were grown with nitrogen from urea at rates of 0.0, 1.0, 2.0 and 3.0 g N/plant (pot). All nitrogen treatments enhanced vegetative growth and total nitrogen in the different plant tissues. Nitrogen fertilization delayed flowering but increased the number of flower/plant and flower diameter. However, nitrogen fertilizer at 1.0 and 2.0 g N/Pant produced the optimum floral number and size in carnation plants.
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