EVALUATION OF INITIAL GROWTH OF CORN SEEDED INTO OATS AND HAIRY VETCH COVER CROPS MANAGED WITH AND WITHOUT HERBICIDES

• Autor(a) principal: FLECK, NILSON GILBERTO
• Data de Publicação: 1997
• Outros Autores: NEVES, RODRIGO, SILVEIRA, CRISTIANE AMARO
• Tipo de documento: Artigo
• Idioma: por
• Título da fonte: Pesquisa Agropecuária Gaúcha (Online)
• Texto Completo: http://revistapag.agricultura.rs.gov.br/ojs/index.php/revistapag/article/view/521
• topic: Avena strigosa; Vicia saliva; 2,4-D; glyphosate; no -till system.; Avena strigosa; Vicia saliva; 2,4 -D; glyphosate; semeadura direta.

With the purpose of evaluating initial growth of com seeded into oats or hairy vetch cover crops, managed with and without herbicide, a trial was conducted in greenhouse, in the Agronomy School of UFRGS, in Porto Alegre, RS, Brazil. Treatments consisted of several systems tested in com pre-seeding (application of the herbicides 2,4-D or glyphosatc over oat plants or over the soil without this crop; com seeded into oats or hairy vetch cover crops not treated with herbicides; and com seeded in soil without cover crops, as well as without herbicide application). There 'ware also tested threc com seeding dates (0, l I and 22 days after herbicide applications). There were not observed interactions between factors tested; nevertheless, significant differences occurred for com plants dry matter when the crop was seeded at various intervals after herbicide applications. Glyphosatc or 2,4-D applications did not affect com plants growth; however, precedent crops of oats or hairy vetch reduced development of these piam& The combination of herbicide application and of oats cover crop affected com plants growth in a similar manner as did oats alone.