1986
DOI: 10.2527/jas1986.621216x
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Effect of Intake and Forage Level on Ruminal Turnover Rates, Bacterial Protein Synthesis and Duodenal Amino Acid Flows in Sheep

Abstract: Four Suffolk wethers (avg wt 65 kg) with ruminal and duodenal cannulae were fed diets containing 75% (75F) or 25% (25F) alfalfa hay at two levels of intake, 1,700 (high intake, HI) or 1,100 (low intake, LI) g dry matter (DM)/d, in a 4 • 4 Latin-square design. When fed 75F diets, wethers had higher (P<.05) ruminal pH and molar proportion of acetate in ruminal fluid than when fed 25F. Ruminal fluid dilution rates were not affected by type of diet, but ruminal particulate dilution rates increased (P<.05) when wet… Show more

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Cited by 106 publications
(58 citation statements)
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“…The content of volatile fatty acids and the acetate/propionate ratio may change due to different forage: concentrate ratios. Higher acetic acid may be observed in the rumen fluid of steers fed diets with higher forage ratios, as described by several researchers (Merchen et al, 1986;Kinser et al, 1988;Zinn et al, 1994). Therefore, a large amount of forage in 60F, which may have resulted in more salivary flow to rumen, provides favorable conditions for the better microbial growth.…”
Section: Discussionmentioning
confidence: 70%
See 1 more Smart Citation
“…The content of volatile fatty acids and the acetate/propionate ratio may change due to different forage: concentrate ratios. Higher acetic acid may be observed in the rumen fluid of steers fed diets with higher forage ratios, as described by several researchers (Merchen et al, 1986;Kinser et al, 1988;Zinn et al, 1994). Therefore, a large amount of forage in 60F, which may have resulted in more salivary flow to rumen, provides favorable conditions for the better microbial growth.…”
Section: Discussionmentioning
confidence: 70%
“…Moreover, it has been reported that Cr supplementation can be employed to manipulate the quality of meat due to its biological function on body fat and muscle metabolism (Kitchalong et al, 1995;Sung et al, 2015); however, factors such as the level of Cr supplementation and its source, nutrients, chromium levels in the basal diet, breed and species may intervene with these functions Ghassemi Nejad et al, 2016). Decreasing diet energy density through increasing forage level may also increase ruminal acetate:propionate ratio and methane energy loss (Merchen et al, 1986;Kinser et al, 1988;Zinn et al, 1994). Therefore, the effects of high-and low-forage diet when supplemented with Cr-Met in diet of Hanwoo steers on rumen fluid characteristics and fatty acid profile of beef were investigated in this study.…”
Section: Introductionmentioning
confidence: 99%
“…Merchen et al (1986) também não encontraram efeito do aumento do consumo (1,6 e 2,6% PV) sobre a digestibilidade ruminal da FDN. O valor médio de 91,4% para a digestão ruminal está de acordo com a maioria dos resultados citados na literatura, o que era esperado, pois a FDN é utilizada, principalmente, no rúmen.…”
Section: Table 5 -Means and Regression Equations (Re) For The Total Cunclassified
“…Esses resultados corroboram os obtidos para as digestibilidades da MS. Merchen et al (1986) encontraram efeito dos níveis de ingestão alto e baixo, 2,6 e 1,6% PV, respectivamente, sobre a digestibilidade total da MO de 78,3 e 81,0%, respectivamente. Woods et al (1999) Tabela 6 -Médias, equações de regressão (ER) e coeficientes de determinação (r 2 ) para as digestibilidades da matéria orgânica total (DMOTO), no rúmen (DMORU) e nos intestinos (DMOIN), em função dos níveis de oferta (NIV), para as metodologias de coletas no abomaso (ABO) e no omaso (OM) Firkins et al (1986), em experimento com bovinos ingerindo quantidades diárias fixas de 9,1 e 6,1 kg MS, não verificaram, como no presente estudo, influência do nível de ingestão sobre a digestibilidade ruminal da MO.…”
Section: 95unclassified