Revista: | Scientia Agricola |
Base de datos: | PERIÓDICA |
Número de sistema: | 000455509 |
ISSN: | 0103-9016 |
Autores: | Guareschi, André1 Cechin, Joanei2 Bianchi, Mario Antonio3 Maldaner, Ivan Carlos4 Machado, Sergio Luiz de Oliveira1 |
Instituciones: | 1Universidade Federal de Santa Maria, CCR, Santa Maria, Rio Grande do Sul. Brasil 2Universidade Federal de Pelotas, FAEM, Pelotas, Rio Grande do Sul. Brasil 3Cooperativa Central Gaúcha LTDA, CCGL-Tec, Cruz Alta, RS. Brasil 4Instituto Federal Farroupilha, Depto, de Agricultura, São Vicente do Sul, RS. Brasil |
Año: | 2021 |
Volumen: | 78 |
Número: | 5 |
País: | Brasil |
Idioma: | Inglés |
Tipo de documento: | Artículo |
Enfoque: | Experimental, analítico |
Resumen en inglés | 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 |
Disciplinas: | Agrociencias |
Palabras clave: | Gramíneas, Lolium multiflorum, Dinámica poblacional, Rotación de cultivos, Mecanización, Control de malezas |
Keyword: | Gramineae, Lolium multiflorum, Dynamic population, Crop rotation, Mechanization, Weed control |
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