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2008, vol. 17, br. 2, str. 73-80
Uloga prostornog rasporeda kukuruza u kompeticiji s korovima
aInstitut za kukuruz 'Zemun polje', Beograd-Zemun
bUniverzitet u Beogradu, Poljoprivredni fakultet
Projekat:
Projekat Ministarstva nauke Republike Srbije, br. TR-6825B

Sažetak
Intenzitet kompeticijskog delovanja useva na korove je uglavnom određen gustinom i prostornim rasporedom gajenih biljaka. U ogledu su ispitivani efekti prostornog rasporeda u kome se gaji kukuruz u kombinaciji sa primenom herbicida u različitim količinama, na zakorovljenost i produktivnost kukuruza tokom 2004. i 2005. godine u Institutu za kukuruz Zemun Polje. Različit prostorni raspored biljaka kukuruza je ostvaren kombinovanjem veličine međurednog razmaka (70, 50 i 35 cm) i razmaka između biljaka, u okviru iste gustine. Podvarijante su dobijene primenom herbicida isoxaflutole+acetohlor, posle setve a pre nicanja kukuruza u tri količine: preporučenoj, polovini peporučene količine i bez herbicda. Analiziran je broj jedinki i sveža masa korova, kao i biomasa i prinos zrna kukuruza. Iako nije bilo statističke značajnosti, broj jedinki i sveža masa korova su se smanjivali sa smanjenjem međurednog razmaka i u proseku imali najmanje vrednosti na varijanti 35 cm, kako u 2004. (78,52 jedinki m-2 i 388,65 g m-2), tako i u 2005. godini (105,78 jedinki m-2 i 191,54 g m-2). Primena herbicida u različitim količinama uticala je na značajno smanjenje zakorovljenosti u obe godine ispitivanja. Prinos zrna kukuruza se nije razlikovao između tretmana sa preporučenom i polovinom količine herbicida, u svim varijantama međurednog razmaka i prosečno.
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O članku

jezik rada: srpski
vrsta rada: izvorni naučni članak
objavljen u SCIndeksu: 01.12.2008.