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Publication
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| Title of Article |
Manipulation of In Vitro Ruminal Fermentation and Feed Digestibility as Influenced by Yeast Waste-Treated Cassava Pulp Substitute Soybean Meal and Different Roughage to Concentrate Ratio |
| Date of Acceptance |
15 September 2021 |
| Journal |
| Title of Journal |
Fermentation |
| Standard |
SCOPUS |
| Institute of Journal |
Licensee MDPI, Basel, Switzerland |
| ISBN/ISSN |
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| Volume |
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| Issue |
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| Month |
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| Year of Publication |
2021 |
| Page |
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| Abstract |
Cassava pulp (CS) is high in fiber and low in protein; hence, improving the nutritive
value of CS is required to increase its contribution to enhancing ruminant production. The present
work hypothesized that CS quality could be enhanced by fermentation with yeast waste (YW),
which can be used to replace soybean meal (SBM), as well as lead to improved feed utilization in
ruminants. Thus, evaluation of in vitro ruminal fermentation and feed digestibility, as influenced by
YW-treated CS and different roughage (R) to concentrate (C) ratios, was elucidated. The design of the
experiment was a 5 3 factorial arrangement in a completely randomized design. Each treatment
contained three replications and three runs. The first factor was replacing SBM with CS fermented
with YW (CSYW) in a concentrate ratio at 100:0, 75:25, 50:50, 25:75, and 0:100, respectively. The
second factor was R:C ratios at 70:30, 50:50, and 30:70. The level of CSYW showed significantly higher
(p < 0.01) gas production from the insoluble fraction (b), potential extent of gas production (a + b),
and cumulative gas production at 96 h than the control group (p < 0.05). There were no interactions
among the CSYW and R:C ratio on the in vitro digestibility (p > 0.05). Furthermore, increasing the
amount of CSYW to replace SBM up to 75% had no negative effect on in vitro neutral detergent fiber
degradability (IVNDFD) (p > 0.05) while replacing CSWY at 100% could reduce IVNDFD (p > 0.05).
The bacterial population in the rumen was reduced by 25.05% when CSYW completely replaced SBM
(p < 0.05); however, 75% of CSWY in the diet did not change the bacterial population (p > 0.05). The
concentration of propionate (C3) decreased upon an increase in the CSYW level, which was lowest
with the replacement of SBM by CSYW up to 75%. However, various R:C ratios did not influence
total volatile fatty acids (VFAs), and the proportion of VFAs (p > 0.05), except the concentration of
C3, increased when the proportion of a concentrate diet increased (p < 0.05). In conclusion, CSYW
could be utilized as a partial replacement for SBM in concentrate diets up to 75% without affecting
gas kinetics, ruminal parameters, or in vitro digestibility. |
| Keyword |
yeast waste; cassava pulp; rumen fermentation; in vitro gas production technique |
| Author |
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| Reviewing Status |
มีผู้ประเมินอิสระ |
| Status |
ตีพิมพ์แล้ว |
| Level of Publication |
นานาชาติ |
| citation |
true |
| Part of thesis |
true |
| Attach file |
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| Citation |
0
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Journal Publication
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