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Relationship of Rumen Volatile Acids, Blood Glucose and Plasma Nonesterified Fatty Acids in Sheep¹

Iowa State University, Ames

Abstract

Concentrations of plasma nonesterified fatty acids in sheep were 0.11, 0.60 and 1.32 meq./l. 4, 24 and 48 hr. following feeding. No significant changes in concentration of blood glucose were observed during 48 hr. after feeding. The increase after feeding in concentration of plasma nonesterified fatty acids coincided with a decrease in concentrations of volatile acids in the rumen. Intravenous injection of glucose, sodium propionate or sodium butyrate into fasting sheep decreased the level of plasma nonesterified fatty acids within 1 hr. No significant change occurred after injection of sodium acetate. Concentration of blood glucose increased following injection of propionate or glucose, remained unchanged following acetate injection and decreased following butyrate injection.

¹ Journal Paper No. J-5227 of the Iowa Agricultural and Home Economics Experiment Station, Ames, Iowa. Project No. 1208. Financially supported in part by the Iowa State University Research Foundation in recognition of research benefits derived from an animal science stilbestrol patent.