PRODUCTION PERFORMANCE OF MAIZE GENETIC BASES SUBJECTED TO TRANSVERSE CUTS OF PLANTS AT VEGETATIVE DEVELOPMENT STAGES

Palavras-chave: Zea mays, Abiotic stress, Sowing dates

Resumo

The objective of this study was to evaluate the production performance of maize genetic bases subjected to transverse cuts of plants at vegetative development stages. An experiment was conducted with three maize genetic bases, on two sowing dates in the 2021/2022 harvest in a completely randomized design. For each sowing date and genetic base, transverse cuts of plants were carried out at development stages V1, V2, V3, V4 and V5, in addition to a treatment without cutting. Number of ears (NE) and grain yield (GY, Mg ha-1) were evaluated. Boxplot graphs were constructed and principal component analysis was performed. Analysis of variance, F test and Scott-Knott means clustering analysis were performed at 5% significance level. The number of ears and grain yield of maize decreased in the following order: double hybrid, triple hybrid and single hybrid. Cutting plants at advanced stages reduces the number of ears and grain yield in all maize genetic bases. Single and triple hybrids show a smaller reduction in the number of ears and grain yield when cut at more advanced stages compared to the double hybrid, which shows a greater reduction.

Biografia do Autor

Alberto Cargnelutti Filho, Universidade Federal de Santa Maria

Docente do Departamento de Fitotecnia - UFSM

Mikael Brum dos Reis, Universidade Federal de Santa Maria

Discente do Curso de Mestrado do Programa de Pós-Graduação em Agronomia - UFSM

João Augusto Andretta, Universidade Federal de Santa Maria

Discente do Curso de Graduação em Agronomia - UFSM

Publicado
2025-02-05
Seção
Ciências Agrárias