Competitive ability of canola (Brassica napus var. oleifera) hybrids with black oat (Avena strigosa) in a subtropical environment

Autores/as

  • Leandro Galon UFFS https://orcid.org/0000-0002-1819-462X
  • Germani Concenço Embrapa Clima Temperado. Department of Sustainable Cropping Systems. 96010-971. Pelotas. Rio Grande do Sul. Brazil https://orcid.org/0000-0003-2203-8766
  • Luciane Renata Agazzi Federal University of Fronteira Sul. Campus Erechim. Laboratory of Sustainable Management of Agricultural Systems. 99700-970. Erechim. Rio Grande do Sul. Brazil https://orcid.org/0000-0001-8157-6244
  • Felipe Nonemacher Federal University of Fronteira Sul. Campus Erechim. Laboratory of Sustainable Management of Agricultural Systems. 99700-970. Erechim. Rio Grande do Sul. Brazil
  • Thais Stradioto Melo Federal University of Pelotas. Campus Capão do Leão. Department of Plant Physiology. 96050-970. Capão do Leão. Rio Grande do Sul. Brazil https://orcid.org/0000-0002-3261-9209
  • Laryssa Barbosa Xavier da Silva Federal University of Pelotas. Campus Capão do Leão. Department of Plant Physiology. 96050-970. Capão do Leão. Rio Grande do Sul. Brazil https://orcid.org/0000-0002-9327-542X
  • Gismael Francisco Perin Federal University of Fronteira Sul. Campus Erechim. Laboratory of Sustainable Management of Agricultural Systems. 99700-970. Erechim. Rio Grande do Sul. Brazil
  • Ignácio Aspiazú State University of Montes Claros. Department of Agricultural Sciences. 39440-000. Janaúba. Minas Gerais. Brazil. https://orcid.org/0000-0002-0042-3324

DOI:

https://doi.org/10.48162/rev.39.046

Palabras clave:

Brassica napus var. oleifera, Avena strigosa, interacción competitiva, método de serie sustitutiva, agresividad

Resumen

The objective of this study was to assess the competitive ability of canola (Brassica
napus var. oleifera) hybrids in competition with black oat (Avena strigosa) in a subtropical environment. The experiments were conducted in a greenhouse where canola hybrids ‘Hyola 61,’ ‘Hyola 76,’ ‘Hyola 433,’ and ‘Hyola 571’ were tested individually for their competitive performance with black oat. The plant proportion between black oat and the canola hybrid was changed (100%:0%; 75%:25%; 50%:50%; 25%:75%; and 0%:100%) while keeping the total population of plants constant (20 plants plot‑1). Photosynthesis rate (μmol m-2 s-1), internal CO2 concentration (μmol mol-1), and  transpiration rate (mol H2O m-2 s-1) were assessed using an infrared gas analyzer 55 days after emergence. Leaf area (m2 m-2) and dry matter (g m-2) were also assessed on the same day. The data set was analyzed by the replacement series method for competition studies. There was evidence of intense competition between canola and black oat, independent of plant proportion. The competitive ability of canola was distinct among hybrids; Hyola 571 performed better than the others in the competition against black oat. Choosing the most competitive hybrid, such as Hyola 571, helps maintain high canola grain yield levels in areas infested with black oat.

Highlights:

  • There is difference in competition among canola hybrids against black oat; Hyola 571 performed better in the competition;
  • Preference should be given for most competitive canola genotypes against weeds, and weed control should be carried out early in the critical period of interference;
  • Aggressiveness is the most preponderant parameter in determining canola genotypes with superior ability in competition against weeds.

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Publicado

06-12-2021

Cómo citar

Galon, L., Concenço, G. ., Agazzi, L. . R., Nonemacher, F. ., Melo, T. S., da Silva , L. B. X. ., Perin , G. F. ., & Aspiazú, I. (2021). Competitive ability of canola (Brassica napus var. oleifera) hybrids with black oat (Avena strigosa) in a subtropical environment. Revista De La Facultad De Ciencias Agrarias UNCuyo, 53(2), 119–131. https://doi.org/10.48162/rev.39.046

Número

Sección

Ecofisiología y Manejo de cultivo

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