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2010, vol. 34, iss. 1, pp. 121-127
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Effect of nitrogen fertilization on the content and uptake of N in the maize lines
Uticaj doza azota na sadržaj i iznošenje azota linijama kukuruza
University of Novi Sad, Faculty of Agriculture, Department of Field and Vegetable Crops
Abstract
Research was conducted at a multiyear stationary field experiment owned by the Institute of Field and Vegetable Crops in Novi Sad at the location of Srbobran. The purpose of the study was to investigate the content and uptake of N by six corn inbred lines belonging to different FAO maturity groups depending from nitrogen fertilization. The average N content in plant material for all corn lines tested and all variants of fertilization during the four years trial was 1%. The yearly nitrogen uptake by grain, cob and stalk depended on corn line, quantity of nitrogen fertilizer applied, as well as from the year of experiment. The shape of the curve of the effect of nitrogen fertilizer applied on the amount of nitrogen uptake by grain was characteristic for quadratic regression.
Sažetak
Istraživanja su obavljena na višegodišnjem stacionarnom poljskom ogledu Instituta za ratarstvo i povrtarstvo u Srbobranu. Proučavan je sadržaj i iznošenje azota prinosom šest inbred linija kukuruza koje pripadaju različitim FAO grupama zrenja, zavisno od varijante đubrenja azotom. Prosečan sadržaj N(%) u biljnom materijalu linija kukuruza za sve linije i varijante đubrenja iznosio je 1%. Iznošenje azota zrnom, kočankom i stablom zavisilo je od linije i primenjenih azotnih đubriva. Uticaj primenjenih doza N na iznošenje N zrnom i ukupnom nadzemnom masom imao je oblik krive kvadratne regresije.
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