Volume 9
Issue 4
Agronomy
JOURNAL OF
POLISH
AGRICULTURAL
UNIVERSITIES
Available Online: http://www.ejpau.media.pl/volume9/issue4/abs-14.html
EFFECT OF N FERTILIZATION AND THE HARVEST DATE ON THE ACCUMULATION OF DRY WEIGHT, ORGANIC AND MINERAL NUTRIENTS IN PLANTS OF SELECTED PEA CULTIVARS
Waldemar Helios1, Andrzej Kotecki2
1 Institute of Agroecology and Plant Production
Wroc³aw University of Environmental and Life Sciences, Poland
2 Department of Plant Cultivation,
Wroc³aw University of Environmental and Life Sciences, Poland
ABSTRACT
In 2000-2002 a field experiment carried out at the Paw³owice Agricultural Experiment Station, in the vicinity of Wroc³aw, investigated the effect of N fertilization and the date of harvest on the accumulation of nutrients in two pea morphotypes: Agra – leafless and traditional Rola cultivars. The dry weight accumulation in pea seeds, pod-shells and stems was determined by seed ripening, weather course and pea cultivar-specific factor, however it did not depend on the N fertilization. In the period from green to full maturity the plants demonstrated some changes: the share of seeds in seed yield increased, whereas the share of pod-shells and stems decreased; the content of total protein, fat, fiber and crude ash as well as P, K, Mg in seeds decreased and the share of NFE increased. In pod-shells and in stems the content of total protein, fat, NFE, P and the energy value decreased, while the content of fiber – increased. The share of seeds, pod-shells and stems in organic and mineral nutrients accumulation differed and dependent on the development phase and was cultivar-specific.
Key words: pea, dry weight, cultivar, organic and mineral nutrients, date of harvest, N fertilization.
Waldemar Helios
Institute of Agroecology and Plant Production
Wroc³aw University of Environmental and Life Sciences, Poland
pl. Grunwaldzki 24A
50-363 Wroc³aw
Poland
email: waldemar.helios@upwr.edu.pl
Andrzej Kotecki
Department of Plant Cultivation,
Wroc³aw University of Environmental and Life Sciences, Poland
pl. Grunwaldzki 24a, 50-363 Wroc³aw
email: andrzej.kotecki@up.wroc.pl
Responses to this article, comments are invited and should be submitted within three months of the publication of the article. If accepted for publication, they will be published in the chapter headed 'Discussions' and hyperlinked to the article.