Document Detail

Efficiency of feed utilization in Holsteins selected for yield.
MedLine Citation:
PMID:  2384617     Owner:  NLM     Status:  MEDLINE    
Feed intakes were obtained for d 71 through d 120 postpartum for 36 first lactation selection and 32 control cows during the last 3 yr of a 16-yr selection experiment for FCM yield in Holsteins. The ration consisted of concentrates fed according to production, limited alfalfa hay, and ad libitum corn silage. The higher estimated net energy intake by selection cows was due primarily to their significantly higher silage intake. Grain intake was slightly higher for the selection animals, but the control animals had a slightly higher hay intake. Neither differences was statistically significant. Only small and statistically nonsignificant differences in BW and weight change were found between the two groups. Selection animals had a 7.6% advantage in gross efficiency for the 50-d trial. Selection for yield gave a desired correlated change in gross feed efficiency.
J E Legates
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Publication Detail:
Type:  Journal Article    
Journal Detail:
Title:  Journal of dairy science     Volume:  73     ISSN:  0022-0302     ISO Abbreviation:  J. Dairy Sci.     Publication Date:  1990 Jun 
Date Detail:
Created Date:  1990-09-18     Completed Date:  1990-09-18     Revised Date:  2003-11-14    
Medline Journal Info:
Nlm Unique ID:  2985126R     Medline TA:  J Dairy Sci     Country:  UNITED STATES    
Other Details:
Languages:  eng     Pagination:  1533-6     Citation Subset:  IM    
Department of Animal Science, North Carolina State University, Raleigh 27695-7621.
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MeSH Terms
Animal Feed
Cattle / genetics,  metabolism*
Energy Intake
Energy Metabolism*

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine

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