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      Persistência do acetochlor em solo sob semeadura direta e convencional Translated title: Acetochlor persistence in soil under no-tillage and conventional systems

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          Abstract

          O manejo do solo pode alterar a persistência dos herbicidas e influi na atividade para controle de plantas daninhas, no potencial de injúria das culturas em sucessão e no risco de contaminação ambiental. Um experimento foi conduzido, no ano agrícola de 1999/2000, na Faculdade de Agronomia da Universidade Federal do Rio Grande do Sul, com o objetivo de avaliar a persistência do herbicida acetochlor em Argissolo Vermelho manejado sob semeadura direta e preparo convencional. A dose de acetochlor utilizada foi de 3.360 g ha-1. O delineamento experimental foi o de blocos casualizados, com três repetições. A persistência do herbicida acetochlor foi avaliada através de bioensaio, utilizando-se o trigo (Triticum aestivum) como planta indicadora. O herbicida acetochlor foi menos persistente no solo sob semeadura direta que sob preparo convencional, com meia-vida de 10 e 29 dias, respectivamente.

          Translated abstract

          Soil management affects herbicide persistence, weed control, crop injury and environmental risks. An experiment was carried out at the Universidade Federal do Rio Grande do Sul - Rio Grande do Sul state, Brazil to evaluate the persistence of acetochlor herbicide in conventional tillage and no-tilage systems. The soil was classified as Paleudult. The tested dose of the herbicide was 3.360 g ha-1. The persistence of acetochlor was evaluated in a bio-assay using wheat (Triticum aestivum). Assessments included plant height and dry matter. Acetochlor half-life was 10 and 29 days under no-tillage and conventional tilled system, respectively.

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          Most cited references25

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          Sistema brasi-leiro de classificação de solos

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            Organic Carbon, Nitrogen, and Phosphorus Concentrations and pH in Soil Profiles as Affected by Tillage Intensity1

            W. A. Dick (1983)
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              Sistema brasileiro de classificação de solos

              (1999)
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                Author and article information

                Journal
                pd
                Planta Daninha
                Planta daninha
                Sociedade Brasileira da Ciência das Plantas Daninhas (Viçosa, MG, Brazil )
                0100-8358
                1806-9681
                April 2002
                : 20
                : 1
                : 133-139
                Affiliations
                [01] Porto Alegre RS orgnameUniversidade Federal do Rio Grande do Sul orgdiv1Faculdade de Agronomia orgdiv2Dep. de Plantas de Lavoura
                Article
                S0100-83582002000100017 S0100-8358(02)02000117
                10.1590/S0100-83582002000100017
                f683d4d7-5528-4a8a-b4db-0426c3ac8ef1

                This work is licensed under a Creative Commons Attribution 4.0 International License.

                History
                : 15 March 2002
                : 15 January 2002
                Page count
                Figures: 0, Tables: 0, Equations: 0, References: 25, Pages: 7
                Product

                SciELO Brazil

                Categories
                Artigos

                half-life,Triticum aestivum,manejo de solos,atividade biológica,persistência,meia-vida,bioactivity,soil management,persistence

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