Influence of nitrogen fertilization on yield and tubers quality in new cultivars of starch potato
Kazimierz Jabłoński
k.jablonski@ihar.edu.plZakład Nasiennictwa i Ochrony Ziemniaka w Boninie, Instytut Hodowli i Aklimatyzacji Roślin w Radzikowie (Poland)
Abstract
In the years 2001–2003, the effect of nitrate fertilization on yield and some quality features of three new high-starch potato cultivars: Neptun, Pasja and Skawa was evaluated in the field experiments carried out on medium-heavy soil. The highest (48.6 t·ha-1) and the lowest (44.8 t·ha-1) tuber yields were obtained with cv. Neptun and cv. Pasja, respectively. The highest starch content (10 t·ha-1) was recorded in cv. Skawa, whereas the lowest one (8.9 t·ha-1) in cv. Pasja. There was no direct correlation between nitrogen fertilization and starch yield in the cultivars under study. In cv. Neptun, the highest starch content was obtained at an N dose of 150 kg·ha-1, while in cvs Pasja and Skawa at 100 kg·ha-1. In cvs Neptun and Skawa, the increase in an N dose up to 150 kg·ha-1 resulted in the increasing number of tubers with hollow centre and rust internal spots. In contrast, no disease effects of increasing N doses were observed with cv. Pasja. The plants of cv. Neptun appeared to be highly susceptible to common scab, especially at higher doses of N fertilization.
Keywords:
nitrate fertilization, potato, potstarch cultivarsato, starch yield, tuber 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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