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Degradabilidade do amido de grãos secos e ensilados de híbridos de milho com textura dura e dentada em função do grau de moagem

Authors: Reis, Wagner dos; Costa, Ciniro; Meirelles, Paulo Roberto de Lima; Silva, Marina Gabriela Berchiol da; Factori, Marco Aurélio; Pariz, Cristiano Magalhães; Mendonça, Simony Alves; +1 Authors

Degradabilidade do amido de grãos secos e ensilados de híbridos de milho com textura dura e dentada em função do grau de moagem

Abstract

Objetivou-se avaliar a degradabilidade do amido de grãos de milho de textura dura e dentada, ensilados e secos, submetidos a três graus de moagem, por meio da degradação ruminal in situ. Foram utilizados três ovinos, fistulados no rúmen, em delineamento inteiramente casualizado, em um esquema fatorial 2 x 2 x 3, sendo dois híbridos de milho (textura dura e dentada), duas formas de conservação (ensilado e seco) e três graus de moagem (moído grosso, médio e fino, correspondendo às peneiras com crivo de 12; 10 e 8 mm). A fração solúvel (A) do amido dos grãos do híbrido de textura dentada na forma ensilada foi maior que a observada em grãos de milho seco e, considerando ambas as formas de conservação, esta fração foi menor para o híbrido de textura dura. Observou-se na fração insolúvel potencialmente degradável (B) situa- ção inversa a estas. A degradação potencial foi maior nos grãos ensilados nas duas texturas. A ensilagem permitiu maior degradação efetiva do amido em relação aos grãos secos nas duas texturas avaliadas e os grãos de textura dentada condicionaram a maior degradabilidade efetiva tanto na forma ensilada quanto de grãos secos. A textura dentada e a ensilagem de grãos como forma de conservação se mostraram a melhor opção considerando a degradabilidade do amido. Independente das formas de conservação, os grãos do híbrido de milho de textura dura devem ser moídos fino, por proporcionar maior degradação ruminal, enquanto que para o híbrido de textura dentada, a moagem média é a mais indicada para ensilagem e a moagem grossa para os grãos secos.

This research evaluated corn grains with flint and dent texture (ensiled high-moisture or dried), submitted to grinding degrees, using the in situ ruminal degradation technique. Three rumen canulated adult sheeps were used in a complete randomized design, using a factorial outline 2 x 2 x 3, with two corn hybrids (flint and dent texture), two conservation methods (ensiled high-moisture and dry) and three grinding degress (whole, coarsely and finely ground, corresponding to the sieve of 12; 10 and 8 mm). Starch soluble fraction (A) of the dent hybrid ensiled corn grains was greater comparing to the dry materials and in both conservation forms this fraction was reduced in the flint texture hybrid, while the insoluble fraction potentially degradable (B) the opposite occurred. The degradation potential was higher in grains ensiled in two textures. The ensiled allowed more starch effective degradation in relation to dry grain in two textures and the grains dent texture hybrid also increased such degradation in both conservation methods. The dent texture and the ensiled high-moisture grains proved the best option considering the starch degradability. Regardless of the conservation forms, the grains of corn hybrid flint texture should be finely ground, for providing higher ruminal degradation, while for the dent texture hybrid, the coarsely and whole grinding are the most suitable for ensiled and dry grain, respectively.

Country
Brazil
Keywords

Nutritive value, Valor nutritivo, granulometria, Granulometria, degradação ruminal, Ruminal degradation, Particle size, silagem de grãos úmidos, SF1-1100, Animal culture, degradação ruminal, High moisture grain, Silagem de grãos úmidos, silagem de grãos úmidos, valor nut, Degradação ruminal

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selected citations
These citations are derived from selected sources.
This is an alternative to the "Influence" indicator, which also reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
BIP!Citations provided by BIP!
popularity
This indicator reflects the "current" impact/attention (the "hype") of an article in the research community at large, based on the underlying citation network.
BIP!Popularity provided by BIP!
influence
This indicator reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
BIP!Influence provided by BIP!
impulse
This indicator reflects the initial momentum of an article directly after its publication, based on the underlying citation network.
BIP!Impulse provided by BIP!
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