Folia Horticulturae

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Changes in quality of red beet cultivars caused by different methods of nitrogen fertilization

Barbara Michalik*, Stanisława Ślęczek*, Ewa Żukowska**, Marek Szklarczyk*

**Department of Genetics, Plant Breeding and Seed Production
**Faculty of Horticulture, Agricultural University
**29 Listopada 54, 31-425 Kraków, Poland
**PHRO (Plant Breeding Co.) Krzeszowice
**Szarych Szeregów 3, 32-065 Krzeszowice, Poland

Eleven red beet genotypes were examined at 2 localities (Prusy and Wieliczka). Three mannaers of nitrogen fertilization were applied. The size of the roots increased with higher nitrogen doses, this being accompanied by a decrease in content of dry matter, from 15.5% (procedure A) to 15.1% (procedure C), soluble solids (around 0.3%), and total sugar, from 9.8% (procedure A) to 8.7% (procedure C). The red pigment content increased from 78.8 mg/100 g f.w. (procedure A) to 82.8 mg/100 g f.w. (procedure B) and decreased to 73.4 mg/100 g f.w. for the highest nitrogen supply level. The yellow pigment content was not affected by different doses of nitrogen. Distinct differences between the analysed genotypes were observed. The cultivar Okrągły Ciemnoczerwony reached the highest nutritional value, while Egipski the lowest pigment content. The reaction of all cultivars to different manners of nitrogen fertilization was similar. The weather conditions highly affected the content of all the analysed compounds.

Michalik B., Ślęczek S., Żukowska E., Szklarczyk M., 1995. Changes in quality of red beet cultivars caused by different methods of nitrogen fertilization. Folia Horticulturae 7/1: 137-144.