Naslov
Nitrogen Uptake and Utilization Efficiency of Maize Hybrids under High and Limited Nutrient Supply

Autori
Varga, Boris ; Grbeša, Darko ; Kljak, Kristina ; Horvat, Tea

Izvornik
Cereal research communications (0133-3720) 36 (2008), S5; 463-466

Vrsta, podvrsta i kategorija rada
Radovi u časopisima, članak, znanstveni

Ključne riječi
yield; stover; grain; uptake; Harvest index

Sažetak
Maize (Zea mays L.) genotypes wit It improved nitrogen utilization efficiency (NUE) are of interest to growers. Field experiments were conducted to evaluate the total N uptake in the aboveground biomass and NUE (kg grain per kg of N absorbed in the aboveground biomass). Four commercial hybrids of similar maturity ranking were grown under the high-N (200 kg N ha(-1)) and low-N (1100 kg N ha(-1)) fertilization rates over three years. Growing conditions significantly affected hybrid performance for NUE, which ranged from 42 kg grain kg N-1 in the low-yielding (dry) environment to 55 kg grain kg N-1 under higher yielding environment, When compared to the low-N rate, the average N uptake was by 32% higher at the high-N rate, whereas smaller differences occurred for the aboveground biomass (12%), grain yields (14%), stover N (28%) and grain N (13%) concentrations. Significant differences existed among tested hybrids for grain yield, aboveground biomass, grain and stover N concentration, N uptake and consequently NUE.

Izvorni jezik
Engleski

Znanstvena područja
Poljoprivreda (agronomija)

Napomena
Rad je kao poster prezentiran na skupu VII. Alps-Adria Scientific Workshop, održanom od 28.04.-02.05.2008., Stara Lesna, Slovačka.

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