Folia Horticulturae

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Changes in nitrate content of red beet with growing time

Dariusz Grzebelus

Department of Genetics, Plant Breeding and Seed Production
Faculty of Horticulture, Agricultural University
29 Listopada 54, 31-425 Kraków, Poland

Seven red beet cultivars were grown in three replicates, in the years 1991-1993. Seed was sown in May and the roots harvested after 100, 120, and 140 days of growth, 10 roots being taken from each replicate. Nitrate content in mixed samples of root tissue was measured ionometrically. Prolongation of the vegetation period from 100 to 120 days did not cause a significant change in the level of nitrates accumulated in the roots. Those harvested after 140 days showed a significant increase in nitrate content. The amount of nitrates in the beet roots depended predominantly on the genetic characteristics of the cultivar. Cv. Okrągły Ciemnoczerwony accumulated nitrates at the lowest level. The cultivars DZE 1 F1, DZE 3 F1, Czerwona Kula, and Crosby showed the highest nitrate content. Varying weather conditions strongly affected the nitrate content of root tissue in the consecutive years of the trials.

Grzebelus D., 1995. Changes in nitrate content of red beet with growing time. Folia Horticulturae 7/2: 35-41.