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Provedor de dados:  Scientia Agricola
País:  Brazil
Título:  Crop rotation and tillage system on the Italian ryegrass seed bank after long-term field management
Autores:  Guareschi,André
Bianchi,Mario Antonio
Maldaner,Ivan Carlos
Machado,Sergio Luiz de Oliveira
Data:  2021-01-01
Ano:  2021
Palavras-chave:  Lolium multiflorum Lam.
Dynamic population
Cultural methods
Mechanical practices
Weed control
Resumo:  ABSTRACT: Italian ryegrass (Lolium multiflorum Lam.) is a troublesome weed widely found in temperate Brazilian fields with several herbicide-resistant populations. Soil seed bank is the main source of future infestations and can be strongly affected by agricultural practices, such as crop rotation and tillage system. Therefore, this study evaluated the long-term effects of different crop rotation and tillage systems on the seed bank of Italian ryegrass. Data were collected in 2012 and 2013 in a field managed since 1985 under conventional-tillage and no-tillage and subjected to three cropping systems (monoculture, total, and partial rotation) compared to the control plot. The samples were collected at three soil depths (0-5, 5-10, and 10-20 cm) using a cylindrical soil sampler, and infestations in the field were evaluated with a sample frame of 1 m2. All cropping systems reduced the soil seed bank of Italian ryegrass, regardless of soil management and sampling depths comparing to the control plot. Total and partial rotation were more effective than soil tillage to reduce the seed bank. A larger number of seeds was observed on the surface layer (0-5 cm) for all cropping systems with more uniform distribution in the soil profile in conventional-tillage. Infestation of Italian ryegrass was greater for monoculture under no-tillage in both years, whereas in total and partial rotation, regardless of soil tillage, infestations remained below 40 seedlings m−2. Thus, strategies to reduce the soil seed bank and infestations of Italian ryegrass should focus on cropping systems with crop rotation and no-tillage.
Tipo:  Info:eu-repo/semantics/article
Idioma:  Inglês
Editor:  São Paulo - Escola Superior de Agricultura "Luiz de Queiroz"
Relação:  10.1590/1678-992x-2019-0266
Formato:  text/html
Fonte:  Scientia Agricola v.78 n.5 2021
Direitos:  info:eu-repo/semantics/openAccess

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