Agronomic characteristics of corn hybrids for silage production in the State of Mato Grosso, Brazil

Abstract

The experiment was conducted at the Experimental Farm of the Federal University of Mato Grosso in the municipality of Santo Antônio do Leverger, State of Mato Grosso, Brazil to evaluate the agronomic characteristics of corn hybrids in the cultivation of second crop for silage production. The experimental design was carried out with randomized blocks with 23 treatments (hybrids) and three replications. Corn hybrids from different seed companies and recommended for the midwestern region of Brazil, were used. The agronomic traits were: stem diameter (cm), plant height and ear insertion (m); yield of green matter (ton. ha-1), percentage of spike, stem and leaves in green mass; ear productivity (ton. ha-1), dry matter content of stem + leaf and whole plant. Hybrids BF 9304, DKB 370, 177 DKB, BF 9534, BF 9417, AG 5020, BE 9701, P 3021 and P 30F98 had the highest production of green matter, plant height and spike insertion. The hybrid BF 9304 was also prominent for spike percentage (50.55%).

<b>Bromatological characteristics and ruminal digestibility of grain corn hybrids with different vitreousness in silage maturity

“…Thus, it was evident that the agronomic and bromatological characteristics of the grain corn hybrids are influenced by the cultivation environment, depending on the genetic basis of the genotypes, and exhibit different behavior when submitted to different environmental conditions. Similar results were observed by Domingues et al (2013), Zsubori et al (2013) and Mendes et al (2015), who evaluated corn hybrids of different grain textures in distinct environments, noting differences between sites in term of the expression pattern of agronomic and bromatological characteristics of corn grains. Corona et al (2006) claimed that the agronomic and nutritional performance of grains is dependent on the genetic background used, which was in accordance with the results obtained in this study.…”

“…Grain corn is a component that comprises approximately 40% of the dry matter of the silage (Pereira et al, 2012;Domingues et al, 2013;Mendes et al, 2015); thus, variations on the digestibility of this portion will certainly affect the final product digestibility, a factor required for obtaining good results.…”

Produção E Composição Bromatológica Da Silagem De Híbridos De Milho Sob Duas Alturas De Corte

“…Segundo Domingues et al (2013), plantas mais altas podem ser mais produtivas e contribuir com a produção de massa verde, mas isso não significa que a silagem produzida será de maior qualidade. No presente estudo, a altura não promoveu acréscimo na produção de massa verde.…”

Qualidade da silagem de milho consorciado com gramíneas tropicais em diferentes espaçamentos

“…Para evitar a limitação da performance animal durante o período seco (doMinGues et al, 2013), a utilização de volumosos e concentrados como complementos ou substitutos ao pasto tem ganhando espaço entre produtores mais tecnificados que buscam destaque no mercado de carnes. Nesse contexto, a silagem de milho, que tem se mostrado uma alternativa viável economicamente, é caracterizada por seu alto valor energético e alimentício (Ferreira et al, 2011) que unidos com a facilidade de adaptação e cultivo da cultura em todo o território brasileiro a torna o alimento ideal para suplementação nutricional na época da seca.…”