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United States Department of Agriculture

Agricultural Research Service

Title: Energy Expenditure in Lactating Goats Using the Fractional Isotope Enrichment Technique

Authors
item Sahlu, T - LANGSTON UNIVERSITY
item Herselman, M - LANGSTON UNIVERSITY
item Hart, S - LANGSTON UNIVERSITY
item Tesfai, K - LANGSTON UNIVERSITY
item Coleman, Samuel

Submitted to: Journal of Animal Science
Publication Type: Abstract Only
Publication Acceptance Date: August 31, 1995
Publication Date: N/A

Technical Abstract: The objective of this study was to determine energy expenditure of lactating and dry goats maintained in confinement. Energy expenditure was measured by the carbon dioxide entry rate technique in 4 lactating and 4 dry Alpine goats. This was done by continuous infusion of NaH13CO3 into the peritoneal cavity and collection of saliva from the parotid gland duct to measure equilibrium levels of isotopic13CO2 in the body. All goats were fed 12% CP and 2.4 ME/kg DM as a total mixed ration. Diets were offered once daily at 0900 to both groups and the lactating does were milked at 0700 and 1600. Body weight, intake , milk production, CO2 and energy expenditure (EE) are summarized in the table below: <p>Lactating Dry SE < P Body weight, kg 45.9 50.5 2.2 .187 ME intake Mcal kg.75 d-1 1.079 .696 .054 .003 Milk Production kg/d 3.4 0 .18 CO2, L kg.75 d-1 49.9 37.3 2.00 .004 EE, Mcal kg.75 d-1 .233 .177 .009 .004

Last Modified: 7/30/2014
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