Document Detail


Effects of a low calcium diet on feed intake, milk production, and response to blood calcium challenge in lactating Holstein cows.
MedLine Citation:
PMID:  819474     Owner:  NLM     Status:  MEDLINE    
Abstract/OtherAbstract:
Twenty-four lactating cows were fed a normal-calcium (.75% of dry matter) diet plus free-choice dicalcium phosphate supplement for 8 wk, a low-calcium (.25% of dry matter) diet for 9 wk, and a low-calcium (.25% of dry matter) diet plus free-choice supplement for 4 wk. The low-calcium diet did not appear to affect adversely feed intake, milk production, or plasma ions. Depression of plasma calcium by sequestration with a chelating agent was less following low intake of calcium than following adequate calcium intake. Presumably, lower calcium intake increased parathyroid hormone which resulted in a larger and more responsive calcium pool immediately mobilizable. Changes in plasma phosphorus and magnesium were similar among treatments. Low calcium intake for short times apparently will not affect intake or production and may increase resistance to calcium stress such as hypocalcemia and parturient paresis.
Authors:
R L Belyea; C E Coppock; G B Lake
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Publication Detail:
Type:  Journal Article    
Journal Detail:
Title:  Journal of dairy science     Volume:  59     ISSN:  0022-0302     ISO Abbreviation:  J. Dairy Sci.     Publication Date:  1976 Jun 
Date Detail:
Created Date:  1976-09-01     Completed Date:  1976-09-01     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:  1068-77     Citation Subset:  IM    
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MeSH Terms
Descriptor/Qualifier:
Animal Feed
Animals
Calcium* / blood,  deficiency
Calcium, Dietary / administration & dosage
Cattle
Edetic Acid / pharmacology*
Female
Lactation* / drug effects
Magnesium / blood
Phosphorus / blood
Pregnancy
Chemical
Reg. No./Substance:
0/Calcium, Dietary; 60-00-4/Edetic Acid; 7439-95-4/Magnesium; 7440-70-2/Calcium; 7723-14-0/Phosphorus

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


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