Dognojevanje silažne koruze (Zea mays) na Gorenjskem, na osnovi Nmin in EUF metode ter hitrih nitratnih testov : diplomska naloga = Top-dressing of silage maize (Zea mays) in Gorenjska-region, on the basis of Nmin and EUF methods and quick nitrate tests : graduation thesis
Jakopič, Barbara
V letih 1994 in 1995 smo opravili poskus dognojevanja silažne koruze s pomočjo Nmin analize, EUF metode in hitrim nitratnim testom (rastlinske in talne). Vseh 7 variant je bilo pognojenih z gnojevko ...(25 m3/ha) pred setvijo, od šestih pa je bilo pet parcel pognojenih še s 40 kg N/ha ob setvi, v fazi 7 do 9 listov pa dognojevanih z različnimi odmerki dušika (50, 90, 130 in 170 kg N/ha), Optimalni pridelek smo dobili pri ciljni vrednosti 140 kg N/ha leta 1994 oziroma 170 kg N/ha v l. 1995. V obeh letih smo dobili maksimalni pridelek pri obroku za dognojevanje s 130 kg N/ha. Ker je vsota obeh frakcij Norg po EUF-metodi višja od 3,0 mg/100 g tal, dognojevanje glede na rezultate EUF metode ne bi bilo potrebno. Po hitrem talnem nitratnem testu in Nmin analizi dobimo primerljive rezultate, vendar so po talnem nitratnem testu le-ti nekoliko večji. Neskladnost med uporabljenimi metodami za določanje potreb po dognojevanju z N nastaja verjetno zaradi izpiranja v zelo deževni klimi Zgornjesavske doline (okoli 1600 mm) in plitvih tal.
Type of material - undergraduate thesis
; adult, serious
Publication and manufacture - Ljubljana : [B. Jakopič], 1996
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