Data/hora: 10/06/2024 18:23:12

Provedor de dados: | 63
País: | Brazil
Título: | Competitivity of the common-bean plant relative to the weed alexandergrass [Brachiaria plantaginea (link) hitch.]
Autores: | Passini,Telma; Christoffoleti,Pedro Jacob; Yada,Inês Fumiko Ubukata.
Data: | 2003-01-01
Ano: | 2003
Palavras-chave: | Replacement series design; Qualitative analysis; Quantitative analysis.
Resumo: | Methodologies of competitive interaction quantification between weeds and crops are not widely elucidated and compared in the literature. The competitive ability of common-bean (Phaseolus vulgaris) relative to alexandergrass (Brachiaria plantaginea) was assessed and two approaches of replacement series experiment analysis were compared. The response of the species to the presence of each other at different densities and proportion was evaluated. Replacement series at total densities of 625, 816 and 1,111 plants m-2 were performed at the proportions of common-bean:alexandergrass of 100:0 (pure stand of common-bean), 75:25, 50:50, 25:75 and 0:100% (pure stand of alexandergrass), at four replicates in a randomized block design. Data analyses were performed by the qualitative compared to the quantitative approach. The quantitative approach provided larger number of information than did the qualitative approach, and indicated that there was intraspecific competition among common-bean plants, and a minimum of interspecific competition from alexandergrass. There was no intraspecific competition among alexandergrass plants, being the crop effect on the weed larger than the effect among alexandergrass plants. The ecological niche differentiation was partial, since the crop intraspecific competition was larger than the interspecific, and the last one was negligible, at the same time that the weed interspecific competition was larger than the intraspecific. Common-bean, as a competitor species, is superior to alexandergrass.
Tipo: | Info:eu-repo/semantics/article
Idioma: | Inglês
Identificador: | http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-90162003000200009
Editor: | São Paulo - Escola Superior de Agricultura "Luiz de Queiroz"
Relação: | 10.1590/S0103-90162003000200009
Formato: | text/html
Fonte: | Scientia Agricola  v.60 n.2 2003
Fonte: | info:eu-repo/semantics/openAccess