Influence of nitrogen fertilization on potato yield and quality of new potato table varieties cultivated on medium-heavy soils
Kazimierz Jabłoński
k.jablonski@ihar.edu.plZakład Nasiennictwa i Ochrony Ziemniaka w Boninie, Instytut Hodowli i Aklimatyzacji Roślin w Radzikowie (Poland)
Abstract
The aim of the field trials carried out at the Plant Breeding and Acclimatization Institute in Bonin in the years 2000–2002 was to assess influence of nitrogen fertilization on tuber yield, its quality and storage stability. The highest marketable yield was obtained with varieties Wawrzyn (53.5 t/ha) and Wolfram (43.2 t/ha), and the lowest one with var. Wiking (36.8 t/ha). All tested potato varieties exhibited high nitrogen requirements. The optimum dose was 150 kg N/ha, and the fertilization efficiency fluctuated between 68 kg and 135 kg of tubers per 1 kg of nitrogen. Increase of nitrogen fertilization reduced both the development of late blight on potato foliage and incidence of common scab and rust internal spots. Higher N doses resulted in the increase of content of nitrates in tubers, particularly in varieties Wiking and Wolfram, but had not significant effects on tuber losses during storage.
Keywords:
fertilization, nitrogen, potato quality, storage stability, varieties, yieldReferences
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Authors
Kazimierz Jabłońskik.jablonski@ihar.edu.pl
Zakład Nasiennictwa i Ochrony Ziemniaka w Boninie, Instytut Hodowli i Aklimatyzacji Roślin w Radzikowie Poland
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