Interference of volunteer corn on soybean cultivars growth and yield

  • Fernanda Cassiane Caratti UNIVERSIDADE FEDERAL DE PELOTAS
  • Fabiane Pinto Lamego Embrapa Pecuária Sul
  • Mario Antonio Bianchi Cooperativa Central Gaúcha Ltda
  • Humberto Farias UNIVERSIDADE FEDERAL DE PELOTAS
  • Bruno Moncks da Silva UNIVERSIDADE FEDERAL DE PELOTAS
  • Joanei Cechin UNIVERSIDADE FEDERAL DE PELOTAS

Abstract

Spontaneous corn plants in soybean crop are considered weeds because they compete for the same environmental resources. The objective of this study was to evaluate the competitive ability of soybean cultivars when in coexistence with spontaneous corn plants. A field experiment was conducted in CCGLTEC, Cruz Alta/RS, in 2014/15, in a split-plot design, with the main plot being composed of four different cultivars (CD 2694, BMX 7166, TEC 5718, TEC 6029) and the subplots of interference conditions (without the presence of corn volunteer plants, in the presence of corn until the V3, V6, V9 stages, or for the entire soybean cycle. Leaf area, shoot dry mass, plant height, chlorophyll index, and development stage were determined at 15, 30, and 49 DAE; we also determined apparent biological productivity, apparent harvest index, and components of productivity and grain yield. The cultivars showed losses in leaf area and shoot dry mass when in coexistence with corn (8 plants m-2) in the three periods evaluated. All cultivars showed losses in apparent biological productivity, apparent harvest index, and final grain yield when growing under competition throughout the cycle. Cultivars with a medium/long growth cycle, such as CD 2694 (maturity groups (GM): 6.9) and BMX 7166 (GM: 6.6), show a higher competitive ability up to V9 stage in contrast to cultivars with a short cycle, such as TEC 5718 (GM: 5.9) and TEC 6029 (GM: 5.7).

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Author Biographies

Fernanda Cassiane Caratti, UNIVERSIDADE FEDERAL DE PELOTAS

Departamento das Ciências Agrárias e Ambientais, Fitossanidade/Herbologia

Fabiane Pinto Lamego, Embrapa Pecuária Sul
 Pesquisadora da Empresa Brasileira de Pesquisa Agropecuária
Mario Antonio Bianchi, Cooperativa Central Gaúcha Ltda
Pesquisador da Cooperativa Central Gaúcha Ltda.
Humberto Farias, UNIVERSIDADE FEDERAL DE PELOTAS
Departamento das Ciências Agrárias e Ambientais, Fitossanidade/Herbologia
Bruno Moncks da Silva, UNIVERSIDADE FEDERAL DE PELOTAS
Departamento das Ciências Agrárias e Ambientais, Fitossanidade/Herbologia
Joanei Cechin, UNIVERSIDADE FEDERAL DE PELOTAS
Departamento das Ciências Agrárias e Ambientais, Fitossanidade/Herbologia
Published
04-01-2019
How to Cite
Caratti, F., Lamego, F., Bianchi, M., Farias, H., da Silva, B., & Cechin, J. (2019). Interference of volunteer corn on soybean cultivars growth and yield. Comunicata Scientiae, 9(4), 637-648. https://doi.org/10.14295/cs.v9i4.1961
Section
Original Article