Effects of nitrogen form of nutrient solution on uptake and concentration macro element and morphological trait in hydroponic tulip

Effects of nutrient solution composition ratio on (Tulipa gesneriana L.) cv, 'Apricot Parrot' and 'Daytona' growth and flowering were studied hydroponics. Plants were grown with five treatments respectively: S-1(0), S-2(0.01), S-3(0.02) S-4(0.03) and S-5(0.04) meq L.-1 ammonium or 0,0.38, 0.74, 0.11 and 0.14 ammonium (NH4+)/NH4+nitrate (NO3)(-)ratios. Flowering was accelerated by increase of ammonium level for both cultivars. Nutrition solution was not significant on the stem length of Daytona cultivar, but maximum flowering stem length occurred S-2 solution for Apricot Parrot cultivar. Increasing ammonium level, decreased potassium concentration in the aerial parts. Total nitrogen of new bulbs decreased with increasing ammonium level for both cultivars. Maximum bulblet production rate occurred in plants that were fed with S-5 solution. Maximum flower longevity was in S-2 solution for both cultivars. growth and quality of tulip were affected by ammonium level in nutrient solution, so for obtain the best flower quality must added to nutrient solution.