Publicação: Weeds alter the establishment of Brachiaria brizantha cv. Marandu
Carregando...
Data
2017-05-01
Orientador
Coorientador
Pós-graduação
Curso de graduação
Título da Revista
ISSN da Revista
Título de Volume
Editor
Centro Int Agricultura Tropical-ciat
Tipo
Resumo
Direito de acesso
Acesso aberto
Resumo
The present study evaluated the effects of different periods of coexistence among the main weeds and Marandu brachiaria grass (Brachiaria brizantha, now Urochloa brizantha) in newly sown pasture. The experiment was conducted in a randomized block with 4 replications, with treatments being 8 coexistence periods: 0, 15, 30, 45, 60, 75, 90 and 120 days after emergence. A phytosociological assessment of the weed community was carried out at the end of the coexistence periods, and weeds were eliminated from the appropriate treatment using herbicide. Key morphogenic parameters of the forages were assessed at the end of the experimental period and dry matter production was determined. Results indicated that the presence of weeds had negative impacts on the main morphogenic components, such as plant height, number of tillers and production of leaf and stem dry matter. The presence of weeds reduced productivity in Marandu, with 15 days competition being sufficient to reduce forage production by approximately 50%, suggesting that weed control measures should be adopted within 15 days following emergence of seedlings of Marandu and weeds.
Descrição
Palavras-chave
Idioma
Inglês
Como citar
Tropical Grasslands-forrajes Tropicales. Valle Del Cauca: Centro Int Agricultura Tropical-ciat, v. 5, n. 2, p. 85-93, 2017.
