Document Detail


Effects of positive-pressure pulsation on several characteristics of milk production.
MedLine Citation:
PMID:  6684132     Owner:  NLM     Status:  MEDLINE    
Abstract/OtherAbstract:
A premilking phase of positive-pressure pulsation was evaluated by comparing milk production, persistence, peak milk flow, average milk flow, and several indicators of udder health of two groups of high-producing Holstein cows. Forty-four cows, 21 controls and 23 test animals, completed at least 250 days of lactation. After a premilking wash-up regimen of 25 to 30 s, test cows were given an additional 45 s for positive-pressure pulsation. The group with positive-pressure pulsation maintained significantly more persistence during the last two-thirds of lactation, and this resulted in an 8% relative increase of milk production over controls. There were no differences of udder health between the two groups as measured by number of cases of clinical mastitis or California mastitis test.
Authors:
D V Armstrong; T N Wegner
Publication Detail:
Type:  Journal Article; Research Support, Non-U.S. Gov't    
Journal Detail:
Title:  Journal of dairy science     Volume:  66     ISSN:  0022-0302     ISO Abbreviation:  J. Dairy Sci.     Publication Date:  1983 Jul 
Date Detail:
Created Date:  1983-10-08     Completed Date:  1983-10-08     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:  1515-8     Citation Subset:  IM    
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MeSH Terms
Descriptor/Qualifier:
Animals
Cattle / physiology*
Dairying / methods*
Female
Milk / secretion*
Milk Ejection
Physical Stimulation
Pregnancy
Pressure

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


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