Changes in nitrate content of red beet caused by different methods of nitrogen fertilization
Department of Genetics, Plant Breeding and Seed Production
Faculty of Horticulture, Agricultural University
29 Listopada 54, 31-425 Kraków, Poland
Eleven red beet genotypes were grown in 2 localities (Prusy and
Wieliczka). Three methods of nitrogen fertilization were applied: A. ammonium nitrate applied
prior to sowing, to reach 60 mg of nitrogen per 1 litre of soil; B. additional dose of ammonium
nitrate used as top-dressing in July, according to soil analysis, in order
to sustain the level of 60 mg of nitrogen per 1 litre of soil; C. additional dose of ammonium
nitrate used as top-dressing in July, according to soil analysis, to
increase the content of nitrogen in soil to 90 mg/l.
Roots were harvested after 140 days of growth. The randomly chosen roots from each replicate were pulped
and analysed ionometrically for nitrate content. Higher nitrogen supply
leves increased the nitrate content of the red beets. Differences in
nitrate accumulation were observed between the studied cultivars. Cv. Okrągły
Ciemnoczerwony showed the lowest level of nitrates. The highest nitrate
content was observed in the roots of the 391 A breeding line. Cultivation
sites and growth conditions in the two years of trials highly affected the
nitrate content of the beet roots.
Grzebelus D., 1995. Changs in nitrate content of red beet caused by different methods of
nitrogen fertilization. Folia Horticulturae 7/2: 43-49.