Effects of a Saccharomyces cerevisiae yeast on ruminal fermentation and fibre degradation of maize silages in cows

Guedes, Cristina; Moreira-Gonçalves, Daniel; Rodrigues, M.A.M.; Dias‐da‐Silva, A.

doi:10.1016/j.anifeedsci.2007.06.037

Cited by 138 publications

(115 citation statements)

References 28 publications

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“…The above results show that the pH value of rumen fluid in experimental cows is at the lower limit of the reference range (6.16) but is significantly higher (P < 0.01) than in the control cows (5.98). In this experiment, we corroborated the opinion of other authors (Guedes et al 2008) about the influence of yeasts on the stabilization of pH value in the rumen fluid. On the other hand, this stabilization effect of yeast culture on the pH value was not proven by Nikkah et al (2004).…”

Section: Resultssupporting

confidence: 91%

Effect of feeding yeast culture on ruminal fermentation and blood indicators of Holstein dairy cows

et al. 2011

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The experiment was conducted to evaluate the effect of yeast culture (Saccharomyces cerevisiae) supplementation on ruminal fermentation in 20 Holstein dairy cows divided into control and experimental groups, each group of 10 cows. The animals received a diet based on maize silage (19 kg), alfalfa silage (15 kg), meadow hay (1.5 kg), extracted rapeseed meal (1 kg) and concentrate mixture (9.5 kg). The diets were fed as a total mixed ration. ) was added to the concentrate mixture in the ration fed to the experimental group of animals. The addition of yeast culture significantly (P < 0.01) increased ruminal pH but had no positive effects on the increased production of volatile fatty acids. The supplementation of yeast culture significantly (P < 0.01) increased numbers of protozoa in the rumen of dairy cows of the experimental group (361.3 ± 18.315) compared to the control group (308.3 ± 37.505). The addition of yeast culture significantly (P < 0.01) increased concentration of serum glucose, calcium, phosphorus, copper, zinc, magnesium and AST (P < 0.05). As compared to the control group (4.948 ± 0.0384 mmol·l -1 ), the level of urea in the blood serum was significantly decreased (P < 0.01) in the experimental group of cows.Our results show that the supplementation of Saccharomyces cerevisiae culture at recommended doses enhances ruminal fermentation which may have a positive effect on milk production and health status of Holstein dairy cows. Saccharomyces cerevisiae, cows, rumen fluid, blood serum indicatorsYeasts and yeast cultures are frequently used as additives in diets of dairy cows at present. They have a positive influence on fermentation in the rumen, which helps to improve production health and productivity of animals.Results from previous studies on the effect of yeasts on ruminal fermentation and productivity of dairy cows are often ambiguous. The most cited benefit of yeast cultures on ruminal digestion is support of the growth and activity of anaerobic, namely cellulolytic bacteria. Yeasts would utilize residual oxygen introduced into the rumen with feeds, thus contributing to maintain anaerobic environment (Calsamiglia et al. 2006). Moreover, by degrading lyotropic carbohydrates in the rumen, yeast cultures regulate the rate of fermentation, and also by stimulation of lactate-utilizing bacteria yeasts facilitate stabilization of the rumen pH and mitigate its frequent oscillations during the day (Williams et al. 1991). Stable rumen environment is a key factor for achieving optimum milk yields and a good health of animals. However, some authors did not observe any beneficial effects of yeast cultures on dry matter intake or on the milk production and its composition in dairy cows (Cooke et al. 2007). Neither the positive influence of yeast on the digestibility of feeds in the rumen was unambiguously corroborated.Recent studies indicate that yeasts produce also certain low-molecular peptides that simulate the activity of some bacteria species in the rumen (Denev et al. 2007). However, to achieve ...

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Section: Resultssupporting

confidence: 91%

Effect of feeding yeast culture on ruminal fermentation and blood indicators of Holstein dairy cows

et al. 2011

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“…at the peack of production [6] were much lower than those recorded by Marden et al [3]. Nonetheless, they were consistent with those measured in cows receiving a diet composed by corn silage, hay and concentrates by Guedes et al [44] who did not report ruminal pH values below 6.0 over an 8 h-post-feeding period. As a result, LY mode of action proposed by Marden et al [3] was not verified in the present study, certainly because of less acidogenic ruminal conditions induced by both experimental diets.…”

Section: Discussionsupporting

confidence: 88%

Interaction between Live Yeast and Dietary Rumen Degradable Protein Level: Effects on Diet Utilization in Early-Lactating Dairy Cows

Julien¹,

Marden²,

Auclair³

et al. 2015

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“…Moreover, the host enzymes are unable to hydrolyze these kinds of molecules. Improving the bioavailability of nutrients in a feedstuff by increasing the cell wall hydrolysis through the microbial supplement is a promising solution and, DFM preparations are reported to promote digestion and intestinal hygiene (Gourinier-Chateau et al, 1994), enhance animal performance and reduce usage of antibiotics (Jouany & Morgavi, 2007;Guedes et al, 2008;Wallace et al, 2008).…”

Section: Discussionmentioning

confidence: 99%

“…One approach that has recently been widely investigated is the application of direct-fed microbial (DFM) preparations, in order to promote digestion and intestinal hygiene (Gourinier-Chateau et al, 1994), enhance animal performance and reduce usage of antibiotics (Jouany & Morgavi, 2007;Guedes et al, 2008;Wallace et al, 2008).…”

Section: Introductionmentioning

confidence: 99%

Comparison of Two Products of Direct-Fed Microbial Supplementation on the Nutrient Utilization and Ruminal Fermentation in Sheep

Sallam¹,

Allam

Najadi³

2014

JAS

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This experiment was undertaken to evaluate the potential impacts of supplementing two direct-fed microbial (DFM) products, namely Bactozyme and Ru-max, to the diet of 12 male Barki sheep (live body weight 46.6 ± 2.9 kg) on dry matter intake (DMI), apparent total tract digestibility of nutrients, nitrogen balance and rumen fermentation characteristics. The Bactozyme or Ru-max were supplemented at a rate of 1.0 g/head/day, mixed with the concentrate mixture. Animals were randomly allocated into 3 equal groups (n=4) and were subjected to the digestibility trails.The results showed that the inclusion of either products of DFM had no positive impact on DMI, but non-significantly improved the apparent total tract digestibility of dry matter (DM), organic matter (OM) and crude protein (CP). However, the Bactozyme addition increased (P<0.05) the apparent total tract digestibility of neutral detergent fiber (NDF) and acid detergent fiber (ADF). The enhancement of the apparent total tract digestibility of cell wall was not significant for the two of DFM products and a non-significant improvement in cell wall digestion due to the Ru-max supplementation over the control group was found. The DFM products had positive impacts on the average of total digestible nutrients (TDN) and digestible crude protein (DCP) but non significant in comparison with the untreated animals. In addition, the nitrogen balance was improved (P>0.05) by 8 and 13% due to Ru-max and Bactozyme supplementation, respectively in comparison with the control group. The results also revealed that inclusion of DFM products had no impacts on rumen pH 3.0 and 6.0 h after feeding but Bactozyme reduced (P<0.05) the rumen pH 1.0 h after feeding compared to the control group. The inclusion of Bactozyme and Ru-max increased (P>0.05) the NH 3 -N concentration in the rumen at 1.0 and 3.0 h after feeding but the Bactozyme decreased (P<0.05) the NH 3 -N concentration and increased the volatile fatty acids (VFA) at 6.0 h after feeding compared to the control group. Overall, results indicated that the two DFM products had positive impacts on cell wall digestibility, which in turn improves metabolic energy supply and nutrients utilization in ruminants as well.

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Effects of a Saccharomyces cerevisiae yeast on ruminal fermentation and fibre degradation of maize silages in cows

Cited by 138 publications

References 28 publications

Effect of feeding yeast culture on ruminal fermentation and blood indicators of Holstein dairy cows

Effect of feeding yeast culture on ruminal fermentation and blood indicators of Holstein dairy cows

Interaction between Live Yeast and Dietary Rumen Degradable Protein Level: Effects on Diet Utilization in Early-Lactating Dairy Cows

Comparison of Two Products of Direct-Fed Microbial Supplementation on the Nutrient Utilization and Ruminal Fermentation in Sheep

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