Rumen Metabolism
Mostrando 1-12 de 70 artigos, teses e dissertações.
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1. Thyme essential oil for sheep: effect on rumen fermentation, nutrient digestibility, nitrogen metabolism, and growth
RESUMO Dois experimentos foram conduzidos para avaliar o efeito de doses de óleo essencial (OE) de tomilho (Thymus vulgaris) sobre a fermentação ruminal, a digestibilidade de nutrientes e o metabolismo de nitrogênio, bem como sobre o desempenho e a descarga de oocistos de coccídeos. No experimento I, 20 ovinos canulados receberam dietas experimentais co
Arq. Bras. Med. Vet. Zootec.. Publicado em: 13/12/2019
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2. USE OF VIRGINIAMYCIN AND SALINOMYCIN IN THE DIET OF BEEF CATTLE REARED UNDER GRAZING DURING THE RAINY SEASON: PERFORMANCE AND RUMINAL METABOLISM
Resumo O rúmen é o órgão mais estudado no que se refere à interação simbiótica entre hospedeiro e a microbiota do trato digestivo dos ruminantes. Assim, objetivou-se avaliar os efeitos da inclusão de virginiamicina e de salinomicina ao suplemento para bovinos de corte com dieta de gramínea tropical no período das águas. Foram constituídos três
Ciênc. anim. bras.. Publicado em: 29/04/2019
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3. New approaches, development, and improvement of methodologies for the assessment of B-vitamin requirements in dairy cows
ABSTRACT Studies on B-vitamin requirements of cattle, conducted more than 60 years ago, concluded that mature ruminants do not require B-vitamin supplements because the amounts of vitamins provided by the diet and synthesized by the ruminal microflora were sufficient to prevent emergence of deficiency symptoms. As a result, the impact of subclinical deficien
R. Bras. Zootec.. Publicado em: 2017-07
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4. Isolation and characterization of yeasts from fermented apple bagasse as additives for ruminant feeding
Abstract Solid-state fermentation can be used to produce feeds for ruminants, which can provide an enriched population of yeasts to improve ruminal fermentation. Fermentation of apple bagasse was performed to obtain a yeast-rich product, with the objective of isolating, identifying, and characterizing yeast strains and testing their capability to enhance in
Braz. J. Microbiol.. Publicado em: 2016-12
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5. Models of protein and amino acid requirements for cattle
Protein supply and requirements by ruminants have been studied for more than a century. These studies led to the accumulation of lots of scientific information about digestion and metabolism of protein by ruminants as well as the characterization of the dietary protein in order to maximize animal performance. During the 1980s and 1990s, when computers became
R. Bras. Zootec.. Publicado em: 2015-03
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6. Different true-protein sources do not modify the metabolism of crossbred Bos taurus × Bos indicus growing heifers
The present study was conducted to investigate the effect of alternative true-protein sources to soybean meal, with different ruminal degradability, using a sugarcane-based diet, on nutrient digestion, ruminal fermentation, efficiency of microbial protein synthesis and passage rate in prepubertal dairy heifers. Eight crossbred rumen- and duodenum-cannulated
R. Bras. Zootec.. Publicado em: 2015-02
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7. Potential and existing mechanisms of enteric methane production in ruminants
Enteric methane (CH4) emissions in ruminants have attracted considerable attention due to their impact on greenhouse gases and the contribution of agricultural practices to global warming. Over the last two decades, a number of approaches have been adopted to mitigate CH4 emissions. However, the mechanisms of methanogenesis have still not been fully defined.
Sci. agric. (Piracicaba, Braz.). Publicado em: 2014-10
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8. Effects of phenolic compounds in propolis on digestive and ruminal parameters in dairy cows
Four rumen-cannulated primiparous lactating cows were studied in a 4 × 4 Latin square design experiment to evaluate the effects of propolis-based products (PBP) with different concentrations of propolis and alcohol levels on total digestibility, (TD), ruminal digestibility (RD), intestinal digestibility (ID), pH, ruminal ammonia-nitrogen production (NH3-N),
R. Bras. Zootec.. Publicado em: 2014-04
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9. Alterações no metabolismo energético e no desempenho de bezerros leiteiros em programas de aleitamento intensivo ou convencional / Changes in energetic metabolism and performance of dairy calves under intensive and conventional milk-feeding programs
O objetivo deste estudo foi avaliar o efeito de diferentes sistemas de aleitamento (convencional, programado ou intensivo) sobre o desempenho e alterações no metabolismo energético de bezerros leiteiros. Após o nascimento, trinta bezerros da raça Holandês foram distribuídos em blocos casualizados e alocados em três programas de aleitamento: 1) Conven
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 23/07/2012
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10. EVALUATION OF THE USE OF Acacia mearnsii TANNIFEROUS EXTRACT AS MODULATOR OF RUMINAL FERMENTATION IN CATTLE / AVALIAÇÃO DO USO DE EXTRATO TANÍFERO DE Acacia mearnsii COMO MODULADOR DA FERMENTAÇÃO RUMINAL EM BOVINOS
The effect of levels of Acacia meanrsii tannin extract addition in cattle diet (0, 0.8, 1.6 or 2.4%, dry matter (DM) basis) on rumen fermentation, digestion and N retention was evaluated. The experiment was conducted in a 4 x 4 Latin Square design with four steers (156 33 kg of body weight (BW)) housed in metabolism cages. Diet was 60% oat (Avena strigosa) a
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 02/03/2012
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11. Intake, nutrient apparent digestibility and ruminal constituents of sheep fed diets with canola, sunflower or castor oils
The objective in this experiment was to determine the effects of feeding diets with canola, sunflower or castor oils on intake, nutrient apparent digestibility and ruminal constituents of crossbred Dorper × Santa Inês sheep. Four rumen-cannulated animals of 90.2±11.4 kg average body weight were assigned to a 4 × 4 latin square. Animals remained individua
R. Bras. Zootec.. Publicado em: 2012-11
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12. Metabolism and ruminal parameters of Holstein × Gir heifers fed sugarcane and increasing levels of crude protein
The objective of this study was to evaluate the effect of increasing levels of crude protein (CP) in the diet (13, 15, 19 and 22 g/100 g of dry matter, DM) on the metabolism and ruminal parameters of crossbred heifers fed forage sugarcane. Four crossbred Holstein × Gir heifers of average initial weight of 200 kg and average age of 14 months were used. The e
R. Bras. Zootec.. Publicado em: 2012-09