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Effect of nitrogen fertilization on growth and development of Pelargonium × hortorum. II. Effect of different N forms

Agnieszka Lis-Krzyścin

Department of Soil Cultivation and Fertilization in Horticulture
Faculty of Horticulture, University of Agriculture in Kraków
29 Listopada 54, 31-425 Kraków, Poland
e-mail: alis@bratek.ogr.ar.krakow.pl

Various forms of nitrogen: NO3- (calcium nitrate), NH4+ (ammonium sulphate), NH2 (urea), and 50% NO3- plus 50% NH4+ (ammonium nitrate) were compared as to their effect on the growth and development of Pelargonium × hortorum ‘Salmon Orange’ Series Pinto. The levels of macronutrients were adjusted by means of topdressing to reach their initial values, i.e. 180 mg N, 90 mg P, 250 mg K, and 80 mg Mg per 1 dm3 of substrate. No distinct differences were found in the number of inflorescences and the flowering dynamics of geranium plants fertilized using different forms of nitrogen. Plants fed with ammonium nitrate showed a poorer growth (shorter main shoots) than those treated with ammonium sulfate or calcium nitrate.

Lis-Krzyścin A., 2003. Effect of nitrogen fertilization on growth and development of Pelargonium × hortorum. II. Effect of different N forms. Folia Horticulturae 15/1: 105-112.