Akademik Veri Yönetim Sistemi
Turkish Journal of Agriculture and Forestry, cilt.21, sa.4, ss.403-406, 1997 (SCI-Expanded)
Using a non-recirculating nutrient film system, experiment was carried out to determine the effects of chloride and reduced forms of N on nitrate. total-N and chloride concentrations of onion (Allium cepa L) plant. The reference treatment with a nutrient solution containing 19 mM NO3 and 1.25 mM NH4 was compared with the mixed amino acid, urea, and glycine treatments and with or without additional chloride (10mM) in which 20% of the NO3 of the reference treatment was substitutied of these reduced forms of N. Fresh and dry weights of the leaves of onion were not affected by the treatments. The nitrate content was considerably lower in the mixed amino acid treatment, being 4236 mg NO3/kg FW as compared to reference, urea or glycine treatments. Nitrate content of the leaves in these treatments were found as fallows, 5393, 5339, 5261 mg NO3/kg FW, respectively. Chloride also reduced nitrate content of the plants from 5816 to 4299 mg NO3/kg FW. Reduced N treatments increased total-N contents of the plants. Chloride content of the plants was increased by chloride supply and reduced forms of N in the nutrient solution.