Weed incidence and sowing time affect soybean development

Autores

  • Luciano Schievenin Universidade Federal de Santa Maria - Campus Frederico Westpahlen
  • Braulio Otomar Caron Universidade Federal de Santa Maria - Campus Frederico Westpahlen
  • Elvis Felipe Elli Universidade de São Paulo, Escola Superior de Agricultura Luiz de Queiroz
  • Felipe Schwerz Universidade de São Paulo, Escola Superior de Agricultura Luiz de Queiroz
  • Ana Paula Rockenbach Universidade de Passo Fundo
  • Diecson Ruy Orsolin da Silva Universidade Federal de Santa Maria - Campus Frederico Westpahlen

DOI:

https://doi.org/10.14295/cs.v9i2.1439

Palavras-chave:

Glycine max, interspecific competition, phytosociological survey, plastochron, thermal sum

Resumo

Despite the economic importance of the effects of weeds on the plastochron and emission of nodes of soybean plants, it has not been studied in detail. The aim of this study was to provide information about the effects of weeds on the development of soybean plants by determining the plastochron and number of nodes of soybean plants of different cultivars sown at different times in soils with presence and absence of weeds. A field study was conducted during the 2013/2014 crop season including a phytosociological survey to identify the occurring weeds, and the determination of the plastochron and final number of nodes of soybean plants. Four botanical families of weeds were found infesting the soybean crops. The plastochron and final number of nodes of soybean were influenced by the cultivar, sowing time, and presence of weeds. The plastochron was higher when the plants were grown in the presence weeds due to the higher relative frequency, relative density, relative abundance, and importance value index of the Euphorbia heterophyla, Ipomoea purpurea, and Urochloa plantaginea species, which resulted in a slower development of the soybean plants, and lower number of nodes per plant.

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Publicado

2018-08-01

Como Citar

Schievenin, L., Caron, B. O., Elli, E. F., Schwerz, F., Rockenbach, A. P., & Orsolin da Silva, D. R. (2018). Weed incidence and sowing time affect soybean development. Comunicata Scientiae, 9(2), 242–251. https://doi.org/10.14295/cs.v9i2.1439

Edição

v. 9 n. 2 (2018)

Seção

Artigos

Licença

A revista se reserva o direito de efetuar, nos originais, alterações de ordem normativa, ortográfica e gramatical, com vistas a manter o padrão culto da língua, respeitando, porém, o estilo dos autores. As provas finais serão enviadas aos autores. Os trabalhos publicados passam a ser propriedade da revista Comunicata Scientiae, ficando sua reimpressão total ou parcial, sujeita à autorização expressa da direção do periódico. Deve ser consignada a fonte de publicação original. Os originais não serão evolvidos aos autores. As opiniões emitidas pelos autores dos artigos são de sua exclusiva responsabilidade.