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Influences of Rumen Fermentation and Bacterial Community Structure of Holstein and Jersey Steers by Dietary Changes

Influences of Rumen Fermentation and Bacterial Community Structure of Holstein and Jersey Steers by Dietary Changes

Seon-Ho Kim1, Mahfuzul Islam1,2, A-Rang Son1, Sang-Suk Lee1* 

1Ruminant Nutrition and Anaerobe Laboratory, Department of Animal Science and Technology, Sunchon National University, Jeonnam 57922, Suncheon, Republic of Korea; 2Department of Microbiology and Parasitology, Sher-e-Bangla Agricultural University, Dhaka 1207, Bangladesh.

*Correspondence | Sang-Suk Lee, Ruminant Nutrition and Anaerobe Laboratory, Department of Animal Science and Technology, Sunchon National University, Jeonnam 57922, Suncheon, Republic of Korea; Email: rumen@scnu.ac.kr 

ABSTRACT

This study investigated the influence of diet types and breed of steers on rumen fermentation and bacterial community composition in Korea during the summer seasons. Three Holstein and 3 Jersey steers were fed a high forage (HF) and a high concentrate (HC) diet for two subsequent periods of 21 days under 2 × 2 factorial arrangements. The steers received HF diet had higher pH (P < 0.05). Higher acetate concentration was recorded in the Jersey steers and those received HF diet; however, the Holstein steers and those received HC diet had higher propionate concentration (P < 0.05). The lowest A:P ratio was observed in the Holstein steers and those received HC diet (P < 0.05). From Metataxonomic analysis, Bacteroidetes and Firmicutes were the most abundant bacterial phyla in both breeds and diets. Bacteroidetes was more abundant in the steers received HF diet while Firmicutes was increased with the HC diet. All four groups of steers had a distinct bacterial community with higher relative abundances. The principal component analysis (PCA) represented that the overall rumen bacterial community along with fermentation parameters varied among four groups. Overall results suggest that the rumen fermentation characteristics differ according to both diets and breeds which was influenced by a distinct bacterial community.

Keywords | Diet types, Holstein steer, Jersey steer, Volatile fatty acids, Rumen bacterial community 

 

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Advances in Animal and Veterinary Sciences

June

Vol. 10, Iss. 6, Pages 1189-1422

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