Effect of Tea Seed Oil on In Vitro Rumen Fermentation, Nutrient Degradability, and Microbial Profile in Water Buffalo

Area of Science:

• Rumen microbiology
• Animal nutrition
• Feed science

Background:

• Water buffaloes are crucial livestock, and optimizing their rumen function is key for sustainable agriculture.
• Dietary strategies are needed to enhance nutrient utilization and reduce environmental impact from livestock.

Purpose of the Study:

• To evaluate the effects of tea seed oil (TSO) on rumen fermentation and microbial communities in water buffaloes.
• To determine the optimal TSO supplementation level for improving diet digestibility and microbial protein synthesis.

Main Methods:

• In vitro incubation of water buffalo diets with varying TSO levels (0%, 0.5%, 1%, 2%).
• Analysis of volatile fatty acids (VFAs), ammonia-nitrogen (NH3-N), dry matter (DM) and crude protein (CP) digestibility.
• Assessment of microbial community populations (bacteria, fungi, methanogens) and diversity.

Main Results:

• TSO supplementation reduced acetate and total VFAs but increased microbial crude protein and CP digestibility.
• Optimal TSO at 1% (DM basis) significantly improved DM digestibility and lowered NH3-N.
• TSO decreased total bacteria, fungi, and methanogens, while enhancing rumen microbial diversity and richness.

Conclusions:

• Tea seed oil modulates rumen microbial populations and fermentation patterns through antimicrobial activity.
• TSO supplementation can reduce methane production and improve nutrient digestibility in water buffalo diets.
• An optimal supplementation rate of 1% TSO (DM basis) is recommended for beneficial effects.