The effect of <i>Saccharomyces cerevisiae</i> on ruminal fermentation in sheep fed high- or low-NDF rations

Abstract

The aim of the study was to determine the effect of live yeast culture (LYC) and dehydrated yeast culture (YC) containing Saccharomyces cerevisiae on fermentation parameters and degradability in the rumen of sheep fed a high-(H-NDF; 56% DM) or low-(L-NDF; 35% DM) NDF diet. Three Polish Merino sheep fitted with ruminal cannulas were used. The effective degradability of maize grain and wheat straw was measured by an in situ procedure. Ruminal pH, ammonia, total volatile fatty acid concentrations, and molar percentages of acetate, propionate and butyrate were not modified by the addition of LYC or YC, irrespective of the applied diet. Compared with control (CON) and LYC supplementation of the L-NDF diet significantly (P<0.05) increased the caproate concentration, but in the H-NDF diet, it increased the lactate concentration (P<0.05). In situ rumen NDF degradability of maize grain and wheat straw was not affected by the treatments. When the sheep were fed the H-NDF diet, however, degradability of dry matter maize grain was significantly higher (P<0.05) than in the CON group. The results of this study did not confirm the hypothesis that NDF in the diet is the main reason for the considerable inconsistencies in the results of experiments with Saccharomyces cerevisiae products.

Effect of Yeast-Based Probiotics Supplementation on the Productive and Reproductive Performance of Lactating Buffaloes

“…Also, YBP have a prebiotic action by providing vitamins and organic acids to support and stimulate the growth of rumen fungi (Mao et al, 2013), rumen protozoa (Kumar et al, 2013), and cellulolytic bacteria (Hristov et al, 2013). Moreover, stabilization of rumen pH (Musa et al, 2009, Grochowska et al, 2012and Diaz et al, 2018 and interaction with ammonia and lactate utilizing bacteria were reported (Dawson, 1992, Yang et al, 2004and Chaucheyras et al, 2012. These effects of using yeast-based probiotics are leading to increase fiber digestion, protein synthesis in the rumen, and thereby, animal productivity (Hillal et al, 2011 andShakira et al, 2017).…”

“…Probiotics are defined as cultures of live microorganisms, or nonviable probiotics including cultural extracts, enzyme preparations, or combinations of these, that have health benefits to the host (Sanders, 2008, Poppy et al, 2012, Ezema, 2013and Suarez, and Guevara, 2018. Several of microorganisms have been reported as probiotics that are used in diet of ruminants to upgrade feed utilization and animal performance (Grochowska, Nowak, Mikula, and Potocka, 2012). Different studies have been reported that T bacterial probiotics give better results in young calves and chickens, whereas yeast and fungal probiotics have an effective action with adult ruminants (Musa et al, 2009 andShakira et al, 2017).…”

Probiotic Yeast: Mode of Action and Its Effects on Ruminant Nutrition

“…A live microorganism which beneficially influences the host by improving microbial flora of its intestine is called probiotic [7]. Numerous microorganisms have been sanctioned as probiotics that are used in diet of ruminants to upgrade nutrient utilization and animal performance [8]. Bacterial probiotics give better results in young calves, chickens, and pigs, whereas yeast/fungal probiotics are effective in adult ruminants [9].…”

The effect of live Saccharomyces cerevisiae yeast in the diet of rams on the digestibility of nutrients, nitrogen and mineral retention, and blood serum biochemical parameters

“…On the other hand, Pysera and Opałka (9) showed that the lipid profile in blood serum can be modified according to the age of the animals and by the amount and kind of fat or feed additives in the diet. Galip (10) and Grochowska et al (11) showed that live S. cerevisiae did not modify VFA in the rumen of sheep.…”