Document Detail

Phase feeding of urea after feeding soybean meal to dairy cows.
MedLine Citation:
PMID:  7193695     Owner:  NLM     Status:  MEDLINE    
Urea-free control, medium-, and high-urea concentrates containing 0, 1.6, and 2.3% urea, respectively, were applied as main treatments, each to a group of nine lactating cows during three 8-wk periods. Split plot treatments consisted of feeding each concentrate normally or the urea portion in phase 2 or 4 h after feeding the soybean meal component. Dry matter intake, milk yield, milk lipid composition of butyric through capric acids were decreased, but milk linoleic acid was increased with high-urea rather than medium-urea or control concentrate. Ammonia in blood serum was reduced with 2-h phase feeding and urea was reduced with 2-h phase feeding and urea was reduced with 2- or 4-h phase feeding as compared to normal feeding. Ammonia was unaffected by normal or phase feeding of the control concentrate. Normal feeding of high-urea concentrate increased ammonia in serum, but phase feeding reverted concentration comparable to the control group (160 to 122 microgram/100 ml). Ammonia was nearly the same with normal or phase feeding of medium-urea concentrate.
P R Narasimhalu; R J Belzile; G J Brisson; W B Holtmann
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Publication Detail:
Type:  Journal Article; Research Support, Non-U.S. Gov't    
Journal Detail:
Title:  Journal of dairy science     Volume:  63     ISSN:  0022-0302     ISO Abbreviation:  J. Dairy Sci.     Publication Date:  1980 Dec 
Date Detail:
Created Date:  1981-05-26     Completed Date:  1981-05-26     Revised Date:  2006-11-15    
Medline Journal Info:
Nlm Unique ID:  2985126R     Medline TA:  J Dairy Sci     Country:  UNITED STATES    
Other Details:
Languages:  eng     Pagination:  2044-50     Citation Subset:  IM    
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MeSH Terms
Amino Acids / blood
Ammonia / blood
Animal Feed*
Cattle* / blood
Eating / drug effects
Lactation / drug effects*
Urea / pharmacology*
Reg. No./Substance:
0/Amino Acids; 57-13-6/Urea; 7664-41-7/Ammonia

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

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