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Cellulose acetate, a new candidate feed supplement for ruminant animals: In vitro evaluations.

Y Watabe¹, Y Suzuki¹, S Koike¹

¹Graduate School of Agriculture, Hokkaido University, Sapporo 060-8589, Japan.

Journal of Dairy Science

|October 1, 2018

Summary

Water-soluble cellulose acetate (WSCA) supplementation in ruminant feed increases ruminal acetate levels and Prevotella bacteria abundance. This feed additive enhances acetate production without negatively impacting digestibility, making it suitable for dairy cattle.

Keywords:

Prevotella cellulose acetate rumen fermentation rumen microbiota

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Area of Science:

Animal Science
Ruminant Nutrition
Microbiology

Background:

Cellulose acetate (CA) is a cellulose derivative evaluated as a novel cellulosic feed source for ruminants.
Understanding its effects on rumen fermentation and microbiota is crucial for feed application.

Purpose of the Study:

To assess the impact of cellulose acetate supplementation on rumen fermentation and microbial populations in vitro.
To determine the optimal type and supplementation level of CA for ruminant feed.

Main Methods:

Batch and continuous culture systems using rumen fluid from Holstein cows.
Inclusion of cellulose, water-soluble CA (WSCA), or insoluble CA as fiber sources.
Analysis of fermentation parameters, microbial abundance (Prevotella), dry matter digestibility, and gas production.

Main Results:

Water-soluble CA (WSCA) supplementation increased ruminal acetate levels in a dose-dependent manner.
WSCA increased the abundance of Prevotella bacteria, including Prevotella ruminicola.
Dry matter digestibility and total gas production remained unaffected by WSCA supplementation.

Conclusions:

WSCA at 15% of total feed increases ruminal acetate production, potentially via Prevotella activation.
WSCA shows promise as a feed additive for dairy cattle, supporting milk fat synthesis without compromising digestion.