Effects of mineral fertilization and the date of harvest on vitamin C content in brussels sprouts
1990
Sciazko, D. (Akademia Rolnicza, Szczecin (Poland). Inst. Przechowalnictwa i Biochemii) | Kolota, E. | Sciazko, T.
The aim of the experiment was to study the influence of different nitrogen rates and the increasing amounts of phosphorus, potassium and magnesium in soil on vitamin C content 2 cultivars of brussels sprouts harvested in autumn and winter. At autumn harvest phosphorus fertilization had positive effect on vitamin C content in sprouts, but the high level of N up to 400 kg N/ha was disadvantageous. Potassium at the recommended rate 200 mg K/cu. dm as well as magnesium at 150 mg Mg/cu. dm in Maczuga cultivar and 300 mg Mg/cu. dm in Lunet F sub (1) increased the synthesis of vitamin C by plants. Vitamin C content in sprouts harvested on the 10th of January from overwintering plants in the field was by mean of 37.2-38.7 percent lower in comparison to those harvested in autumn. The stability if this constituent in frozen sprouts was not dependent on NPK and Mg fertilization
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