Juniper Publishers Journal of Dairy and Veterinary Sciences

JUNIPER PUBLISHERS - OPEN ACCESS JOURNAL OF DAIRY & VETERINARY SCIENCES Abstract Due to the development of the Brazilian sheep breeding, new alternatives for animal feeding, in order to increase gain and economic result of the production, were required. The present paper intends to evaluate the effect of the addition of live yeast concentrate (LYC) on Santa Inês/Dorper lambs diet, in the growth performance. For this purpose, 16 weaned lambs were used, divided in two groups (Yeast X Control) which received both the same feed and sanitary management, although the group yeast has received 2g of LYC/an.day. The effect of LYC was significant and positive for average daily gain (Yeast = 214.0g/day X Control = 194.8g/day). Keywords: Live Weight Gain; Feed additive; Growth; Yeast concentrate; Animal feeding; probiotics; Nutrition; Saccharomyces cerevisiae; Jeopardizing human; Fibrous fraction; Starch; soluble carbohydrates; Feeding strategy; Dorper lambs; Ruminal pH

JUNIPER PUBLISHERS - OPEN ACCESS JOURNAL OF DAIRY & VETERINARY SCIENCES Abstract The objective of this paper is to review the effects of quality and amounts of dietary protein on dairy cattle reproduction and the environment. Protein supplementation is one of important nutrient in dairy production. But, an excess amount of protein beyond the requirements of dairy cow affects reproduction as well as the environment. Protein is needed to meet nitrogen requirements of rumen microorganisms as well as used as a direct source of protein for milking cows. An excess amount of rumen degradable protein can be excreted into the environments and impose an impact on it. Excess rumen degradable protein also results in high amounts of ammonia in the blood of dairy cow when there is no sufficient amount of energy to convert ammonia into microbial protein. In addition, conversion of excess ammonia is energy demanding which can result in negative energy balance. This excess ammonia a