Effect of Diamonium Phosphate (DAP) Fertilization in Different Doses On Bulb and Flower of Narcissus

Abstract

Narcissus tazetta bulbs were fertilized at 0, 4, 8 and 12 kg/da with DAP (diamonium phosphate) and the effects on bulb growth and flower quality criteria were studied. The highest dose applied in fertilization, 12 kg/da, yielded 3.93 bulb efficiency, 36.82 mm of bulb diameter, 212.45 mm of flower height, 18.38 mm of bunch height, 5.56 mm of stem thickness and 196.85 mm of leaf length,while the highest value of average bunch number, 2.69, was obtained at 0 kg/da of fertilization dose and the highest main bulb weight of 27.68 g was yielded at 4 kg/da.