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2020, vol. 65, br. 2, str. 121-136
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Suzbijanje korova i produktivnost kukuruza (Zea mays L.)
Weed control and productivity of maize (Zea mays L.)
Kwara State University, Department of Crop Production, Malete, Ilorin, Kwara State, Nigeria
e-adresa: oyaimoloame@yahoo.com
Sažetak
Poljski ogledi su sprovedeni na Nastavno-istraživačkom imanju Državnog univerziteta u Kvari, Malete, kako bi se odredio metod suzbijanja korova koji će biti efikasniji u suzbijanju korova i uz pomoć kojeg će se postići viši prinos zrna i prihod u proizvodnji kukuruza. Ogled se sastojao od 9 tretmana: Primextra + Aminicome u dozi od 1,5 + 1,5 kg ha-1 (metolahlor 375 g a.s. ha-1 + atrazin 375 g a.s. ha-1 + 2,4 - D 900 g a.s. ha-1), Primextra + Aminicome u dozi od 2,0 + 2,0 kg ha-1 (metolahlor 500 g a.s. ha-1 + atrazin 500 g a.s. ha-1 + 2,4 - D 1200 g a.s. ha-1), Primextra + Aminicome u dozi od 2,5 + 2,5 kg ha-1 (metolahlor 750 g a.s. ha-1 + atrazin750 g a.s. ha-1 + 2,4 - D 1500 g a.s. ha-1), Primextra + Guard force u dozi od 1,5 + 0,03 kg ha-1 (metolahlor 375 g a.s. ha-1 + atrazin 375 g a.s. ha-1 + nikosulfuron 1,2 g a.s. ha-1), Primextra + Guard force u dozi od 2,0 + 0,05 kg ha-1 (metolahlor 500 g a.s. ha-1 + atrazin 500 g a.s. ha-1 + nikosulfuron 2,0 g a.s. ha-1), Primextra + Guard force u dozi od 2,5 + 0,07 kg ha-1 (metolahlor 750 g a.s. ha-1 + atrazin 750 g a.s. ha-1 + nikosulfuron 2,8 g a.s. ha-1 ), Primextra u dozi od 1,5 kg ha-1 (metolahlor 375 g a.s. ha-1 + atrazin 375 g a.s. ha-1) + jedno dodatno okopavanje 6 nedelja posle setve, dva ručna plevljenja 3 i 6 nedelja posle setve i kontrola bez uklanjanja korova. Ovi tretmani bili su postavljeni u randomiziranom potpunom blok dizajnu sa tri ponavljanja. Prikupljeni podaci su obrađeni analizom varijanse uz pomoć softverskog paketa za statističku analizu (SAS), posle čega su srednje vrednosti odvojene korišćenjem Dankanovog testa višestrukog poređenja. Rezultati su pokazali da se kombinacijama tretiranja primenom Primextra u dozi od 1,5 kg ha-1 + jedno dodatno okopavanje 6 nedelja posle setve, dva okopavanja 3 i 6 nedelja posle setve, Primextra + Aminicome u dozi od 2,0 + 2,0 kg ha-1 i Primextra + Guard force u dozi od 2,0 + 0,05 kg ha-1 postiže efikasno suzbijanje korova, veći prinos zrna i novčani prihod. Poljoprivrednici u Maleteu ih zato preporučuju za primenu u rotaciji.
Abstract
Field trials were conducted at the Teaching and Research Farm of Kwara State University, Malete, to determine the weed control method that will be more effective in controlling weeds and give higher grain yield and cash returns in the production of maize. The experiment consisted of 9 treatments: Primextra + Aminicome at 1.5 + 1.5 kg ha-1 (metolachlor 375 g A.I. ha-1 + atrazine 375 g A.I. ha-1 + 2,4-D 900 g A.I. ha-1), Primextra + Aminicome at 2.0 + 2.0 kg ha-1 (metolachlor 500 g A.I. ha-1 + atrazine 500 g A.I. ha-1 + 2,4-D 1200 g A.I. ha-1), Primextra + Aminicome at 2.5 + 2.5 kg ha-1 (metolachlor 750 g A.I. ha-1 + atrazine 750 g A.I. ha-1 + 2,4-D 1500 g A.I. ha-1), Primextra + Guard force at 1.5 + 0.03 kg ha-1 (metolachlor 375 g A.I. ha-1 + atrazine 375 g A.I. ha-1 + nicosulfuron 1.2 g A.I. ha-1), Primextra + Guard force at 2.0 + 0.05 kg ha-1 (metolachlor 500 g A.I. ha-1 + atrazine 500 g A.I. ha-1 + nicosulfuron 2.0 g A.I. ha-1), Primextra + Guard force at 2.5 + 0.07 kg ha-1 (metolachlor 750 g A.I. ha-1 + atrazine 750 g A.I. ha-1 + nicosulfuron 2.8 g A.I. ha-1), Primextra at 1.5 kg ha-1 (metolachlor 375 g A.I. ha-1 + atrazine 375 g A.I. ha-1) + one supplementary hoe weeding (SHW) at 6 weeks after sowing (WAS), two hand weedings at 3 and 6 weeks after sowing (WAS) and a weedy check. These treatments were laid out in a randomized complete block design (RCBD) with three replicates. Data collected were subjected to analysis of variance using the Statistical Analysis Software (SAS) package, after which means were separated using Duncan's Multiple Range Test (DMRT). Results showed that treatment combinations of Primextra at 1.5 Kg ha-1 + one SHW at 6 WAS, two hoe weedings at 3 and 6 WAS, Primextra + Aminicome at 2.0 + 2.0 kg ha-1 and Primextra + Guard force at 2.0 + 0.05 kg ha-1 gave effective weed control, higher grain yield and cash returns. They are therefore recommended for application in rotation by farmers in Malete.
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