Efeito do ambiente ruminal sobre a degradabilidade de colmos da cana-de-açúcar

Pereira, Marcos Neves; Costa, H.N.; Melo, Ricardo Peixoto de; Chaves, M.L.; Lima, Ronaldo Francisco de; Pereira, R.A.N.

doi:10.1590/1678-7610

Cited by 3 publications

(3 citation statements)

References 15 publications

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“…The in situ grain ruminal digestibility (DEG) harvested in silage maturity was performed according to the methodology proposed by Pereira et al (2015). A composite sample was used by the junction of four field replicates of each treatment with a duplicate in each animal.…”

Section: Methodsmentioning

confidence: 99%

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

et al. 2016

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ABSTRACT. 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 Paraná State. The harvest for the grain quality analysis was performed at ¾ 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.

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Section: Methodsmentioning

confidence: 99%

“…Each bag received six grams of dried grains at 55°C. The grains were sectioned into four parts to simulate the silage process as described by Pereira et al (2015).…”

Section: Methodsmentioning

confidence: 99%

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

et al. 2016

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“…A digestibilidade ruminal dos grãos e da forragem dos híbridos de milho colhidos no ponto de ensilagem foi realizada de acordo com a metodologia proposta por Pereira et al (2015). Foi utilizada uma amostra composta pela junção das quatro repetições de campo, para cada tratamento, e incubadas em duplicata em cada animal.…”

Section: Methodsunclassified

Características bromatológicas do grão e forragem de híbridos de milho com diferentes texturas de grãos

Rossi

Faria

Mendes

et al. 2016

Agraria

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RESUMOForam avaliados doze híbridos comerciais de milho com grãos duros e dentados em dois locais no Centro Sul do Paraná, com o objetivo de estudar o efeito da vitreosidade dos grãos no comportamento agronômico, valor nutricional e na digestibilidade da massa seca dos grãos e da forragem no ponto de ensilagem. O delineamento experimental foi de blocos ao acaso, e a colheita para análise da qualidade da forragem e dos grãos, foi realizada no estádio de ¾ da linha do leite no grão, correspondente ao ponto de ensilagem. Foram avaliadas características produtivas, vitreosidade, digestibilidade dos grãos e da forragem, bem como características bromatológicas dos híbridos avaliados. Houve efeito significativo para locais, híbridos, e para interação híbridos x locais para características de importância para forragem. Por meio da análise da vitreosidade constatou-se genótipos de milho com textura dos grãos, variando de 50,1 a 75,2% demonstrando variabilidade disponível para o caráter em híbridos comerciais. Os híbridos AS 1572PRO e AG 8041PRO de grãos dentados semi dentados, destacaram-se e podem ser recomendados como sendo de elevada produtividade de massa seca digestível.Palavras-chave: grãos dentados, grãos duros, ponto de ensilagem, vitreosidade, Zea mays Bromatological characteristics of the grain and forage of corn hybrids with different grains textures ABSTRACTWere evaluated twelve commercial corn hybrids with hard and dent grains in two locals in South Central of Paraná State, South Region, Brazil, with the objective of study the effect of the vitreousness of the grains in agronomic behavior, nutritional value and digestibility dry mass of grains and forage, at the silage maturity. The experimental design was randomize blocks, and the harvest for forage and gains quality analysis was performed at the ¾ of the milk line stage in grain, corresponding at silage maturity. Were evaluated yield characteristics, vitreousness, digestibility of grains and forage, as well as bromatological characteristics of the evaluated hybrids. There was significant effect to locals, hybrids and to interaction hybrids x locals, in important forage quality characteristic. The vitreousness analyses possibly to verify corn genotypes with grains textures ranging from 50.1 to 75.2%, showing variability available for the character in commercial hybrids. The hybrids AS 1572PRO and AG 8041PRO, with dent and semi dent grains, stood out and can be recommended as high productivity of digestible dry matter.

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Fibrous coproducts of corn and citrus as forage and concentrate sources for dairy cows

Silva

Carvalho

Silva³

et al. 2022

Journal of Dairy Science

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This study evaluated the effect on dairy cows of the partial replacement of whole plant corn silage (WPCS) with corn ear fibrous coproduct (CEFC) in diets with concentrate coproducts from citrus and corn on dry matter intake (DMI), lactation performance, digestibility, and chewing behavior. Holstein dairy cows (n = 20) in 5, 4 × 4 Latin squares (21-d periods) were fed a combination of strategies for feeding fibrous coproducts in a 2 × 2 factorial arrangement of the following treatments:(1) forage feeds: the partial replacement of WPCS (CS) with CEFC (CO), and (2) concentrate feeds: the partial replacement of wet corn gluten feed (GF) with a blend of pelleted citrus and corn distillers dried grains (CD) to have isonitrogenous diets. The concentrations of physically effective neutral detergent fiber (NDF; pe NDF >8 ) were (% of dry matter): 21.8% for CS, 19.2% for CO, 20.7% for GF, and 20.2% for CD. Cows fed diet CS-CD had the highest yield of energy-corrected milk (30.0 kg/d) relative to the other diets (28.4 kg/d). Milk fat concentration was reduced on CO relative to CS. Cows fed the CO diets had higher DMI (21.2 vs. 20.2 kg/d) and digestible organic matter intake and tended to have a lower ratio of energy-corrected milk to DMI than cows fed CS. Diets CO reduced the daily intake of pe NDF >8 and the intake as percent of body weight of pe NDF >8 , forage NDF, and total NDF relative to CS. Cows fed CO had greater meal frequency and lower daily meal time, meal duration, meal size, and duration of the largest meal than cows fed CS. The CO diet reduced rumination and total chewing in minutes per day and minutes per kilogram of DMI. When expressed per unit of pe NDF >8 intake, rumination and total chewing were not affected by forage source. The total-tract starch digestibility coefficient was lower for cows fed CO than CS, but the intake of digestible starch was higher on CO than CS. Cows fed GF had reduced milk yield (29.6 vs. 30.8 kg/d), tended to have reduced DMI (20.4 vs. 21.0 kg/d), and had reduced digestible organic matter intake than cows fed CD. Feed efficiency was not affected by source of concentrate. The type of concentrate did not affect the intake of forage NDF and pe NDF >8 , but cows fed GF had higher intake of total NDF as percent of body weight than cows fed CD. The GF increased meal frequency and reduced meal size and largest meal duration and size. Cows fed GF had higher rumination and total chewing than cows fed CD (min/d, min/kg of DMI, and min/kg pe NDF >8 ). Starch digestibility was higher and the intake of digestible starch tended to be higher on cows fed GF than CD. Plasma urea-N was higher, milk urea-N tended to be higher, and N utilization efficiency tended to be lower on cows fed GF than CD. Ruminal microbial yield was not affected by any treatment. All strategies evaluated were nutritionally viable and CEFC was a feasible partial replacement for WPCS.

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Efeito do ambiente ruminal sobre a degradabilidade de colmos da cana-de-açúcar

Cited by 3 publications

References 15 publications

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

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

Características bromatológicas do grão e forragem de híbridos de milho com diferentes texturas de grãos

Fibrous coproducts of corn and citrus as forage and concentrate sources for dairy cows

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