Relationships between vitamin C and nitrates contents in tubers of potato cultivars belonging to different maturity groups
Cezary Trawczyński
c.trawczynski@ihar.edu.plInstytut Hodowli i Aklimatyzacji Roślin — Państwowy Instytut Badawczy, Zakład Agronomii Ziemniaka, Oddział w Jadwisinie (Poland)
Anna Wierzbicka
Instytut Hodowli i Aklimatyzacji Roślin — Państwowy Instytut Badawczy, Zakład Agronomii Ziemniaka, Oddział w Jadwisinie (Poland)
Abstract
In a field experiment conducted in the years 2006–2011, the influence of potato cultivars and climate conditions on the content of vitamin C and nitrates in tubers and relationships between components were determined. The investigations were carried out in the light soil conditions on 28 table potato cultivars which were divided into three groups: very early and early, mid early, mid late and late. Organic fertilization in the form of straw and aftercrop of white mustard was applied. Mineral fertilization was applied in the doses of 100 kg N∙ha-1; 39.2 kg P∙ha-1; 99.6 kg K∙ha-1. We found significant differences in vitamin C and nitrates content in tubers and relationship between this component for cultivars and weather conditions in years. In most of the tested cultivars, the ratios of vitamin C to nitrates in tubers were advantageous (above 2/1). More advantageous ratios of vitamin C to nitrates were found in the tubers of mid early, mid late and late cultivars in comparison to tubers of very early and early cultivars. It was stated that in the years with higher precipitation than the long-term mean, especially in months July-August (2009, 2010, 2011) that were not favourable for nitrates accumulation in tubers, relationship between vitamin C to nitrates was wider than in other years.
Keywords:
nitrates, potato cultivars, ratio vitamin C/nitrates, vitamin C, weather conditionsReferences
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Authors
Cezary Trawczyńskic.trawczynski@ihar.edu.pl
Instytut Hodowli i Aklimatyzacji Roślin — Państwowy Instytut Badawczy, Zakład Agronomii Ziemniaka, Oddział w Jadwisinie Poland
Authors
Anna WierzbickaInstytut Hodowli i Aklimatyzacji Roślin — Państwowy Instytut Badawczy, Zakład Agronomii Ziemniaka, Oddział w Jadwisinie Poland
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