Data/hora: 13/06/2024 02:20:10

Provedor de dados: | 87
País: | Brazil
Título: | Weed interference on growth and yield of transgenic maize
Autores: | Faria,R.M.; Barros,R.E.; Tuffi Santos,L.D.
Data: | 2014-09-01
Ano: | 2014
Palavras-chave: | Competitive ability; Brachiaria brizantha; Commelina benghalensis; Bidens pilosa; Sorghum arundinaceum; Ipomoea triloba.
Resumo: | Plants kept under competition tend to modify their morphology to optimize the use of production factors. This study aimed to evaluate the effects of competition between transgenic maize and five weed species on the growth and yield of transgenic maize hybrid. The experiment used a randomized block design with four replicates in a factorial 5 x 2 + 6 scheme consisting of a combination of maize under competition with five weed species (Bidens pilosa, Commelina benghalensis, Brachiaria brizantha, Sorghum arundinaceum and Ipomoea triloba) in two weed densities (15 or 30 plants m-2) plus six treatments corresponding to maize and weed species without competition. All the means for dry matter accumulated by maize plants in the stem and leaf in the density of 15 plants m ² were higher than the means for plants in coexistence with 30 plants m-². Number of kernels, diameter and length of cob were not affected by competition with weeds. The weeds that most interfered with maize biomass production were S.arundinaceum and B.brizantha. Leaf dry mass accumulation was more sensitive than the production of stem. It was observed that maize was usually very competitive with weeds, and there was a strong decrease in dry matter accumulation of all the weeds in the study when in coexistence with the crop.
Tipo: | Info:eu-repo/semantics/article
Idioma: | Inglês
Identificador: | http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-83582014000300007
Editor: | Sociedade Brasileira da Ciência das Plantas Daninhas
Relação: | 10.1590/S0100-83582014000300007
Formato: | text/html
Fonte: | Planta Daninha  v.32 n.3 2014
Fonte: | info:eu-repo/semantics/openAccess