Bromatological characteristics and ruminal digestibility of grain corn hybrids with different vitreousness in silage maturity/Caracteristicas bromatologicas e digestibilidade de graos de hibridos de milho com diferentes vitreosidades no ponto de silagem

The aim of this research was to evaluate vitreousness in commercial corn hybrids with flint and dent grains and to study the effect of this characteristic on agronomic behavior, nutritional value, and ruminal degradability of grains harvested in silage maturity. Twelve commercial corn hybrids were e...

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Bibliographic Details
Published in:Acta scientiarum. Agronomy 2016-07, Vol.38 (3), p.337
Main Authors: Rossi, Evandrei Santos, Faria, Marcos Ventura, Mendes, Marcelo Cruz, Neumann, Mikael, Gabriel, Andre, Del Conte, Murilo Viotto
Format: Article
Language:Spanish
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Summary:The aim of this research was to evaluate vitreousness in commercial corn hybrids with flint and dent grains and to study the effect of this characteristic on agronomic behavior, nutritional value, and ruminal degradability of grains harvested in silage maturity. Twelve commercial corn hybrids were evaluated. They were divided in two groups (six with flint grains and six with dent grains). The experiments were conducted in two municipalities represented by Guarapuava and Laranjeiras do Sul, both in Parana State. The harvest for the grain quality analysis was performed at 3/4 of the milk line stage in the grain. The following characteristics were evaluated: grain yield, grain yield in silage maturity, vitreousness, ruminal digestibility of grain, neutral detergent fiber, acid detergent fiber and crude protein. The grains in the group of dent hybrids exhibited better degradability associated with lower vitreousness than the group of flint hybrids. The group of dent hybrids exhibited better ruminal digestibility of the grains associated with lower vitreousness versus the group of flint hybrids. There is a negative correlation between vitreousness and the digestibility of the grain; thus, vitreousness can be a criterion for selecting genotypes for forage production. Keywords: endosperm, protein matrix, degradability, grain texture, Zea mays L. O objetivo desta pesquisa foi avaliar a vitreosidade em hibridos comerciais de milho com graos duros e dentados, e estudar o efeito desta caracteristica no comportamento agronomico, valor nutricional e na degradabilidade ruminal dos graos colhidos no ponto de silagem. Foram avaliados 12 hibridos comerciais de milho. Estes hibridos foram divididos em dois grupos (seis com graos duros e seis com graos dentados). Os experimentos foram conduzidos em dois municipios representados por Guarapuava e Laranjeiras do Sul, no Parana. A colheita para analise da qualidade dos graos foi feita no estadio de 3/4 da linha do leite no grao. Foram avaliadas as seguintes caracteristicas: produtividade de grao secos, produtividade de graos no ponto de ensilagem, vitreosidade, digestibilidade ruminal de graos, fibra em detergente neutro, fibra em detergente acido e proteina bruta. Ha uma melhor digestibilidade ruminal dos graos no grupo de hibridos dentados, associada a menor vitreosidade quando comparada ao grupo de hibridos duros. Existe correlacao negativa entre a vitreosidade e a digestibilidade dos graos e podem ser um criterio para seleci
ISSN:1679-9275
1807-8621
DOI:10.4025/actasciagron.v38i3.28703