May 2017 Vol. 5 No.5

Search Pubmed for articles by:
 

Habeeb AAM
El-Tarabany AA

Other links:
PubMed Citation
Related articles in PubMed























 

Review

Effect of yeast on Ruminal function of farm animals

Habeeb A. A. M., H.M. Saleh and A. A. EL-Tarabany

Department of Biological Applications, Radioisotopes Applications Division, Nuclear Research Center, Atomic Energy Authority, Inshas, Cairo, Egypt, P.O.13759

*Corresponding Author’s E-mail: dr_ alnaimy@yahoo.com or alnaimy252011@gmail.com

Accepted May 15, 2017

Abstract

Nutrient yeast is used where producing animal feed, as well as an additive to the feed ration of farmed animals, farmed poultry and fur-bearing animals. Yeast supplemented to animal diet to stabilize the microflora in the gut, consequently improving the fiber digestion, which means better overall feed utilization and a healthier gut. Modes of action of yeast additives on rumen microbiota including improvement of rumen maturity by favoring microbial establishment, stabilization of Ruminal pH and interactions with lactate-metabolizing bacteria and increase of fiber degradation and interactions with plant cell wall degrading microorganisms Numerous studies documented positive effects of Yeast Culture (YC) not only on the rumen environment, but also on the improvement of microbial activities. YC have caused beneficial changes in activity and numbers of rumen microbes. Yeast supplements stimulate the growth of beneficial the numbers of total Ruminal anaerobes microorganisms in the rumen and stimulate the growth of beneficial the numbers of total Ruminal cellulolytic bacteria. YC improve the cellulolytic activities of rumen microorganisms, increase their total numbers, improve fiber digestion, reduce lactate accumulation, reduce the concentration of oxygen in rumen fluid and improve utilization of starch supplied in the feeding ration.

Key words: digestibility, feed utilization, rumen bacteria, rumen function, rumen VFAs, yeast