The Effects of Live Yeast (Saccharomyces cerevisiae) and Chitosan on Digestion Coefficient and Molecular Biology of Main Cellulolytic Bacteria in Male Balady Goat

Abstract

The present study throw lights on the influence of dietary supplementation of live dried yeast Saccharomyces cerevisiae and chitozan on digestion coefficient and molecular biology of some cellulolytic bacteria in male Balady goats. A total number of 12 castrated adult male Balady goats aged one-year-old were allocated into three equal groups. Concentrates were offered at rate of 3% of body weight. Experimental groups were control group fed on basal diet without any feed additives, Saccharomyces cerevisiae group fed on basal diet with S. cerevisiae additive at rate of 0.3% (3 Kg/ton concentrate), and chitosan group fed on basal diet with chitosan additive at rate of 0.2% (2 kg/ton concentrate). Results revealed significant increase (p <0.05) in nutrient digestibility of dry matter, crude protein, ether extract (EE), crude fiber, nitrogen free extract, and Ash. Moreover, there was a significant (P< 0.05) up regulation of genes expression level in S. cerevisiae and chitosan groups when compared with the control except in EE showed non-significant increase in chitosan group compared with the control group. Thus, it is recommended to use S. cerevisiae to improve feed efficiency of diet, growth and multiplication of ruminal microbes.