Evaluation of different inclusion levels of dry live yeast impacts on various rumen parameters and in situ digestibilities of dry matter and neutral detergent fiber in growing and finishing beef cattle

Cagle, Caitlyn M; Batista, Luiz Fernando Dias; Anderson, Robin C.; Fonseca, Mozart Alves; Cravey, M D; Julien, Christine

doi:10.1093/jas/skz342

Cited by 14 publications

(10 citation statements)

References 45 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…No interaction effect was observed between the R:C ratio and LY addition on TVFA and VFA profiles. The total concentrations of VFA ranged from 43.2 to 50.4 mM in all treatments and were similar to those observed by Wang et al [ 7 ] and Cagle et al [ 3 ]. Increasing the proportion of a concentrate diet increased TVFA and C3, whereas the C2 and the C2-to-C3 ratios decreased ( p < 0.05).…”

Section: Resultssupporting

confidence: 89%

“…Increasing the proportion of a concentrate diet increased TVFA and C3, whereas the C2 and the C2-to-C3 ratios decreased ( p < 0.05). When the degradability of feed increased, the TVFA and proportion of C3 concentrations increased, whereas the proportion and ratio of C2 to C4 and C2 to C3 decreased, respectively [ 3 , 26 , 40 ]. This could be due to the fact that a concentrate contains a fraction of highly degradable carbohydrates, especially starch.…”

Section: Resultsmentioning

confidence: 99%

“…The ability of LY in the rumen could assist in the growth of lactate-consuming and cellulolytic bacterial populations, sequentially aiding in the stabilization of the rumen and increasing the rumen’s capacity to digest fiber [ 43 ]. The addition of LY might have enhanced the rumen microbial population, resulting in a better fermentation of carbohydrates into VFAs [ 3 ].…”

Section: Resultsmentioning

confidence: 99%

“…Supplementation of direct fed microbial has been shown to improve animal performance due to its ability to modify feed utilization and the efficiency [ 1 , 2 ]. Live yeast (LY) is one of the most studied of those direct-fed microbes; specifically, Saccharomyces cerevisiae is used not only to improve production performance, but also to reduce the risk of transferring antibiotic resistance or possible human pathogens and to minimize the excretion of pollutants [ 3 , 4 , 5 ]. S. cerevisiae has been used for many years, to promote ruminal fermentation, minimize the loss of energy and nutrients, and thus increase the ruminant production system.…”

Section: Introductionmentioning

confidence: 99%

“…R:C, roughage-to-concentrate ratio; 2 LY, live yeast addition (×10 6 colony-forming unit);3 Gas kinetic, a, the gas production from the immediately soluble fraction; b, the gas production from the insoluble fraction; c, the gas production rate constant for the insoluble fraction (b); a + b, the gas potential extent of gas production; SEM, standard error of the mean.…”

mentioning

confidence: 99%

See 4 more Smart Citations

Roughage to Concentrate Ratio and Saccharomyces cerevisiae Inclusion Could Modulate Feed Digestion and In Vitro Ruminal Fermentation

Phesatcha

Wanapat

Cherdthong

2020

Veterinary Sciences

View full text Add to dashboard Cite

The objective of this research was to investigate the effect of the roughage-to-concentrate (R:C) ratio and the addition of live yeast (LY) on ruminal fermentation characteristics and methane (CH4) production. The experimental design was randomly allocated according to a completely randomized design in a 4 × 4 factorial arrangement. The first factor was four rations of R:C at 80:20, 60:40, 40:60, and 20:80, and the second factor was an additional four doses of Saccharomyces cerevisiae (live yeast; LY) at 0, 2.0 × 106, 4.0 × 106, and 6.0 × 106 colony-forming unit (cfu), respectively. For the in vitro method, during the incubation, the gas production was noted at 0, 1, 2, 4, 6, 8, 10, 12, 18, 24, 48, 72, and 96 h. The rumen solution mixture was collected at 0, 4, 8, 12, and 24 h of incubating after inoculation. Cumulative gas production at 96 h was highest in the R:C ratio, at 20:80, while the addition of LY improves the kinetics and accumulation of gas (p > 0.05). Maximum in vitro dry matter digestibility (IVDMD) and in vitro organic matter digestibility (IVOMD) at 24 h after incubation were achieved at the R:C ratio 20:80 and the addition of LY at 6 × 106 cfu, which were greater than the control by 13.7% and 12.4%, respectively. Ruminal pH at 8 h after incubation decreased with an increased proportion of concentrates in the diet, whereas it was lowest when the R:C ratio was at 20:80. Increasing the proportion of a concentrate diet increased total volatile fatty acid (TVFA) and propionic acid (C3), whereas the acetic acid (C2) and C2-to-C3 ratios decreased (p < 0.05). TVFA and C3 increased with the addition of LY at 6 × 106 cfu, which was greater than the control by 11.5% and 17.2%, respectively. No interaction effect was observed between the R:C ratio and LY on the CH4 concentration. The calculated ruminal CH4 production decreased with the increasing proportion of concentrates in the diet, particularly the R:C ratio at 20:80. The CH4 production for LY addition at 6 × 106 cfu was lower than the control treatment by 17.2%. Moreover, the greatest populations of bacteria, protozoa, and fungi at 8 h after incubation were found with the addition of LY at 6 × 106 cfu, which were higher than the control by 19.0%, 20.7%, and 40.4%, respectively. In conclusion, a high ratio of roughage and the concentrate and addition of LY at 6.0 × 106 cfu of the total dietary substrate could improve rumen fermentation, improve feed digestibility, and reduce the CH4 production.

show abstract

Section: Resultssupporting

confidence: 89%