Competition between corn hybrids with weeds

Authors

  • Leandro Galon Engenheiro Agrônomo, Doutor em Fitotecnia, professor do curso de Agronomia e do Programa de Pós-Graduação em Ciência e Tecnologia Ambiental da Universidade Federal da Fronteira Sul, Campus Erechim; e-mail: leandro.galone@gmail.com. https://orcid.org/0000-0002-1819-462X
  • Ricardo Luis Gabiatti Biólogo, Mestrando do Programa de Pós-Graduação em Ciência e Tecnologia Ambiental da Universidade Federal da Fronteira Sul, Campus Erechim; e-mail: ricardo.gabiatti@edu.sesisc.org.br. https://orcid.org/0000-0002-9873-7443
  • Luciana Renata Agazzi Discente de Agronomia da Universidade Federal da Fronteira Sul, Campus Erechim, e-mail: luci_agazzi@hotmail.com. https://orcid.org/0000-0001-8157-6244
  • Sabrina Natalia Weirich Discente de Agronomia da Universidade Federal da Fronteira Sul, Campus Erechim; e-mail: weirichsabrina@hotmail.com. https://orcid.org/0000-0001-8422-2126
  • André Luiz Radünz Engenheiro Agrônomo, Doutor em Agronomia, professor de Fitotecnia da Universidade Federal da Fronteira Sul, Campus Erechim, e-mail: andre.radunz@uffs.edu.br. https://orcid.org/0000-0002-2397-011X
  • Daiani Brandler Doutoranda em Agronomia pela Universidade Tecnológica Federal do Paraná (UTFPR), Campou Pato Branco, e-mail: daianibrandler@hotmail.com. https://orcid.org/0000-0002-3347-0522
  • Leonardo Brunetto Mestrando no Programa de Pós-Graduação em Ciência e Tecnologia Ambiental, da UFFS, Campus Erechim; e-mail: leonardobrunetto@outlook.com. https://orcid.org/0000-0002-8252-6908
  • Antônio Marcos Loureiro da Silva Mestrando do Programa de Pós-Graduação em Ciência e Tecnologia Ambiental, da UFFS, Campus Erechim, e-mail: antoniomarcoslsr@gmail.com. https://orcid.org/0000-0001-7198-8616
  • Ignacio Aspiazú Engenheiro Agrônomo, Doutor em Fitotecnia, professor de Plantas Daninhas e Grandes Culturas da Universidade Estadual de Montes Claros; e-mail: aspiazu@gmail.com. https://orcid.org/0000-0002-0042-3324
  • Gismael Francisco Perin Engenheiro Agrônomo, Doutor em Engenharia Agrícola, professor de Engenharia Rural da Universidade Federal da Fronteira Sul, Campus Erechim, e-mail: gismaelperin@gmail.com. https://orcid.org/0000-0002-9036-0426

DOI:

https://doi.org/10.17648/sas.v2i1.101

Keywords:

Digitaria ciliaris, Ipomoea indivisa, Zea mays

Abstract

The weeds Digitaria ciliaris (crabgrass) and Ipomoea indivisa (morning glory) stand out for causing many losses in corn. The objective of this work was to evaluate the relative competitive interaction between corn hybrids in the presence of crabgrass and morning glory through replacement series experiments, which were installed in randomized blocks, with four replications. First, for both corn hybrids (Agroeste - AS 1551 PRO 2, Morgan - MG 300 PW, Nidera - NS 92 PRO and Syngenta - Velox TL) and for weeds (crabgrass and morning glory), the density of plants in which the final production became constant was determined (20 plants pot-1 or 463 plants m-2). Subsequently, eight experiments were installed to evaluate the competitive ability of corn hybrids with weeds, both conducted in replacement series, in different combinations of species, varying the relative proportions (100:0, 75:25, 50:50, 25:75 e 0:100%) plants pot-1 (20:0; 15:5; 10:10; 5:15 e 0:20). The analysis of the species competitiveness was carried out by diagrams applied to experiments with replacement series and also by the relative competitiveness indexes. At 50 days after the emergence of the species, leaf area and dry mass of the shoots of the plants were measured. Corn hybrids and weeds were negatively affected, with interspecific competition being the most damaging to species. The crop showed the highest values for competitiveness rates, growth, dominance and aggressiveness. When comparing species to each other, corn was more competitive than weeds.

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Published

2020-12-19

How to Cite

Galon, L., Gabiatti, R. L. ., Agazzi, L. R., Weirich, S. N. ., Radünz, A. L. ., Brandler, D. ., Brunetto, L., Silva, A. M. L. da ., Aspiazú, I., & Perin, G. F. (2020). Competition between corn hybrids with weeds. South American Sciences, 2(1), e21101. https://doi.org/10.17648/sas.v2i1.101

Issue

Section

Artigos Originais (Ciências Agrárias)