Desempenho produtivo do milho em diferentes arranjos de plantas

Paulo Henrique Cazarim; Gabriel Danilo Shimizu; Lucas Henrique Fantin; Marcelo Augusto de Aguiar e Silva; Claudemir Zucareli

doi:10.1590/1983-21252023v36n306rc

Authors

Paulo Henrique Cazarim Graduate Program in Agronomy, Universidade Estadual de Londrina, Londrina, PR https://orcid.org/0000-0002-6997-0772
Gabriel Danilo Shimizu Graduate Program in Agronomy, Universidade Estadual de Londrina, Londrina, PR https://orcid.org/0000-0001-8524-508X
Lucas Henrique Fantin Research and Development, Fundação Chapadão, Chapadão do Sul, MS https://orcid.org/0000-0002-5632-3007
Marcelo Augusto de Aguiar e Silva Graduate Program in Agronomy, Universidade Estadual de Londrina, Londrina, PR https://orcid.org/0000-0003-3835-1124
Claudemir Zucareli Graduate Program in Agronomy, Universidade Estadual de Londrina, Londrina, PR https://orcid.org/0000-0002-5260-0468

DOI:

https://doi.org/10.1590/1983-21252023v36n306rc

Keywords:

Zea mays L. Inter-row spacing. Plant density. Leaf disease severity.

Abstract

Sowing arrangements composed of double-row spacing in corn can favor the interception of solar radiation by the canopy and, consequently, the yield performance of the crop. However, it is possible that the microclimate provided by this spacing, especially at high plant densities, favors the occurrence of leaf diseases. Thus, the objective was to evaluate the effect of 0.45 m and double-row spacing arrangements on the severity of foliar diseases and yield performance of corn grown in the first and second-crop seasons. Two independent experiments were conducted (with and without the fungicide fluxapyroxad + pyraclostrobin) in the first and second-crop seasons in a randomized block design arranged in a split-plot scheme with four repetitions. The plots consisted of spacing (0.45 m) and double-row (0.30 × 0.60 m), and the subplots, four plant densities (59,200, 74,000, 81,400, and 96,200 plants ha^-1). In the plant density factor, in the second-crop season, there is a decrease in the severity of white spot as plant density is increased. Also, for the plant density factor, in the first-crop season, there may be a significant yield increase as the plant density is increased.

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