Influence of combined yeast culture and enzymatically hydrolyzed yeast on <i>in vitro</i> ruminal fermentation in contrasting feed substrates

Sookrali, A. A.; Hughes, Martin

doi:10.1002/jsfa.11709

Cited by 2 publications

(1 citation statement)

References 25 publications

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“…In fact, gases such as methane, hydrogen, and carbon dioxide are produced by rumen microbes that degrade carbohydrates and other nutrients in the feed (Aragadvay-Yungán et al, 2021 ). Cumulative gas production can reflect the substrate utilization degree and nutrient value of rumen microorganisms (Sookrali and Hughes, 2021 ). In this study, we observed that MA + M could improve the GP 72 of rice straw.…”

Section: Discussionmentioning

confidence: 99%

A Combination of Novel Microecological Agents and Molasses Role in Digestibility and Fermentation of Rice Straw by Facilitating the Ruminal Microbial Colonization

Khan

et al. 2022

Front. Microbiol.

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In this study, we evaluated the effect of microecological agents (MA) combined with molasses (M) on the biodegradation of rice straw in the rumen. Rice straw was pretreated in laboratory polyethylene 25 × 35 cm sterile bags with no additive control (Con), MA, and MA + M for 7, 15, 30, and 45 days, and then the efficacy of MA + M pretreatment was evaluated both in vitro and in vivo. The scanning electron microscopy, X-ray diffraction analysis, and Fourier-transform infrared spectroscopy results showed that the MA or MA + M pretreatment altered the physical and chemical structure of rice straw. Meanwhile, the ruminal microbial attachment on the surface of rice straw was significantly increased after MA+M pretreatment. Furthermore, MA + M not only promoted rice straw fermentation in vitro but also improved digestibility by specifically inducing rumen colonization of Prevotellaceae_UCG-001, Butyrivibrio, and Succinimonas. Altogether, we concluded that microecological agents and molasses could be the best choices as a biological pretreatment for rice straw to enhance its nutritive value as a ruminant's feed.

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Section: Discussionmentioning

confidence: 99%

A Combination of Novel Microecological Agents and Molasses Role in Digestibility and Fermentation of Rice Straw by Facilitating the Ruminal Microbial Colonization

Khan

et al. 2022

Front. Microbiol.

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Potential of Combined Yeast Culture and Enzymatically Hydrolysed Yeast to Improve In Vitro Dry Matter and Nutrient Degradability of Different Feedstuffs

Sookrali,

Hughes

2024

Ruminants

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Live yeast cultures have been a popular additive in ruminant feeds to improve fermentation efficiency, rumen, and intestinal health. However, very little is known about inactive yeast culture and hydrolysable yeast cells on nutrient digestibility in ruminants. Therefore, this study was conducted to determine the effects of a combined yeast culture and enzymatically hydrolysed yeast (YC+EHY) on in vitro dry matter and nutrient digestibility. Seven chemically contrasting substrates, including the leaves and petiole of forage plants (Trichanthera gigantea, Gliricidia sepium, Leucaena leucocephala, and Brachiaria arrecta), agriculture by-products (soybean meal and rice hulls), and a commercial concentrate feed, were incubated in vitro with and without YC+EHY to determine dry matter (DM), crude protein (CP), neutral detergent fibre (NDF), and acid detergent fibre (ADF) digestibility after 24 and 48 h of incubation. A second experiment evaluated in vitro CP degradability by incubating substrates for 0, 2, 4, 8, 16, 24, and 48 h with and without YC+EHY. Incubation with YC+EHY reduced 24 h DM and CP digestibility in soybean meal and G. sepium by 16.2% and 38.5%, respectively. Conversely, the ADF digestibility of B. arrecta incubated with YC+EHY increased by 32%. In vitro ruminal DM and nutrient digestibility were unaffected by YC+EHY after 48 h of incubation. The rate of CP degradability in the commercial concentrate and rice hull inoculated with YC+EHY increased sharply between 16 and 24 h post-incubation and generally plateaued afterwards. Similarly, YC+EHY significantly increased CP degradability in L. leucocephala after 8 and 16 h of incubation. The 16 h CP degradation in T. gigantea without YC+EHY was significantly higher. It was therefore concluded that YC+EHY has potential to improve ruminal ADF digestibility and modify ruminal CP degradation dependent on the type of substrate.

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Influence of combined yeast culture and enzymatically hydrolyzed yeast on in vitro ruminal fermentation in contrasting feed substrates

Cited by 2 publications

References 25 publications

A Combination of Novel Microecological Agents and Molasses Role in Digestibility and Fermentation of Rice Straw by Facilitating the Ruminal Microbial Colonization

A Combination of Novel Microecological Agents and Molasses Role in Digestibility and Fermentation of Rice Straw by Facilitating the Ruminal Microbial Colonization

Potential of Combined Yeast Culture and Enzymatically Hydrolysed Yeast to Improve In Vitro Dry Matter and Nutrient Degradability of Different Feedstuffs

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