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2018, vol. 27, br. 1, str. 35-44
Uticaj vremena uklanjanja korova i pre-em primene herbicida na rast useva soje
aUniverzitet u Beogradu, Poljoprivredni fakultet
bUniversity of Nebraska, Northeast Research and Extension Center, Department of Agronomy and Horticulture, Concord, NE,USA

e-adresapavlepavlov93@gmail.com
Ključne reči: kompeticija korova i useva; soja; PRE-EM herbicidi; rast i razvoj useva.
Sažetak
Poljski ogledi su izvedeni tokom 2017. godine na lokalitetu Concord na severoistoku savezne države Nebraska, SAD. Cilj ogleda je bio da se oceni kako različita vremena uklanjanja korova i primena PRE-EM herbicida utiču na rast i razvoj useva soje. Ogled je rađen po principu split- plot rasporeda sa 14 tretmana (2 različita režima primene PRE-EM herbicida i 7 različitih vremena uklanjanja korova) u četiri ponavljanja. Dva režima primene PRE-EM herbicida: režim bez primene PRE-EM herbicida i režim sa primenom PRE-EM herbicida na bazi mešavine sulfentrazona i imazetapira (140 i 28 g a.s. ha-1). Sedam vremena uklanjanja korova je bilo: V1, V3, V6, R2 i R5 faza razvoja soje, kao i nezakorovljena i zakorovljena kontrola. Vegetativni parametri soje (lisna površina i suva masa) su ocenjivani tokom R6 faze razvoja useva. Odloženo vreme uklanjanja korova je imalo značajnog uticaja na rast soje, time što su lisna površina i suva masa bili značajno redukovani. Bez primene PRE-EM herbicida redukcija lisne površine i suve mase soje za 5% se poklopilo sa odlaganjem uklanjanja korova od 100 GDD nakon nicanja soje (što korespondira sa V1 fazom razvoja soje, odnosno 10 dana nakon nicanja [DNN] useva). Međutim, primena PRE-EM herbicida je dodatno odložila ovo smanjenje, što korespondira sa 382 GDD nakon nicanja soje (što se poklapa sa V5 fazom razvoja soje, odnosno sa 34 DNN-a soje). Na osnovu dobijenih rezultata može se konstatovati da primena PRE-EM herbicida može da zaštiti soju od smanjenja rasta i odloži POST-EM primenu herbicida i do tri nedelje nakon nicanja useva.
Reference
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O članku

jezik rada: engleski
vrsta rada: naučni članak
DOI: 10.5937/ActaHerb1801035P
objavljen u SCIndeksu: 10.01.2019.

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