UTJECAJ RAZLIČITIH ORGANSKIH TVARI I NPK GNOJIVA NA PERFORMANCE KUKURUZA

The interest in organic materials as soil fertility restorer is increasing due to the high cost and unavailability at the right time of inorganic fertilizer and the problem associated with residue disposal by burning which can further aggravate global warming. The effects of different organic materials and NPK fertilizer on the performance of maize were examined in field experiments carried out at the Teaching and Research Farm of the Ambrose Alli University, Ekpoma in a forest savanna transition zone of Edo State, Nigeria. The investigations were carried out during the 2008 and 2009 cropping seasons and involved the use of organic materials (wood shavings, rice hulls, kola husks and their combinations) and NPK fertilizer. The layout of the experiment was a randomized complete block design with three replicates. The results indicated that most of the organic materials, especially kola husk and mixtures with kola husk and NPK increased yield and its components. The treatments significantly increased the concentrations of N, P, K and Na in ear leaves and grains.Interes za organskim tvarima koje poboljšavaju plodnost tla povećava se zbog visoke cijene i pravovremene nedostupnosti anorganskoga gnojiva, a taj je problem povezan sa zbrinjavanjem ostataka koji se spaljuju, što može dodatno pogoršati globalno zagrijavanje. Utjecaj raznih organskih tvari i NPK gnojiva na performanse kukuruza ispitan je u poljskim pokusima provedenim na farmi za istraživanje Sveučilišta Ambroze Alli, Ekpoma u području prelaska šume u savanu u državi Edo, Nigerija. Istraživanja su se provodila tijekom vegetacije 2008. i 2009. godine, a obuhvatila su uporabu organskih tvari (drvene strugotine, rižine i koline ljuskice, kao i njihove kombinacije) i NPK gnojiva. Pokus se provodio prema slučajnome potpunome blok rasporedu u tri ponavljanja. Rezultati su ukazali na to da su većina organskih tvari, naročito ljuskice kole i njihove mješavine, kao i NPK gnojivo, povećali prinos njegove komponente. Ti su postupci značajno povećali koncentracije N, P, K i Na u komušini i zrnu