Document Detail

Effects of vitamin E and different energy sources on vitamin E status, milk quality and reproduction in transition cows.
MedLine Citation:
PMID:  11199208     Owner:  NLM     Status:  MEDLINE    
We investigated whether vitamin E supplementation and supplemental energy sources (fat or starch) influenced plasma and milk levels of vitamin E, and reproductive and other parameters in 28 Italian Friesian multiparous dry cows. From 14 days before expected calving to 7 days after, the animals were assigned to either basal diet (containing 1000 IU/day of vitamin E) or an extra 1000 IU/day of vitamin E (total 2000 IU). In addition they received either 0.5 kg/day of corn or 0.2 kg/day of calcium soaps. Plasma samples were collected 4 days before expected calving and 4 days after calving and analysed for alpha-tocopherol and cholesterol. Milk yield as well as the composition, somatic cell count (SCC) and alpha-tocopherol of milk were determined 7 and 14 days after calving. Milk yield and composition were unaffected by treatments. SCC was significantly lower in (SCC Log 4.62 versus Log 5.1, P < 0.01) 2000 IU/day animals than in the 1000 IU/day group. Milk alpha-tocopherol was higher (P < 0.001) in animals receiving 2000 IU/day (1.11 vs. 0.65 microgram/ml, P < 0.01). Plasma alpha-tocopherol in animals receiving 2000 IU/day was also higher (P < 0.001) than in cows receiving 1000 IU/day (4.85 vs. 3.25 micrograms/ml), but was not affected by dietary energy source. Number of services and days to conception were lower (P < 0.01) in the 2000 IU vitamin E supplemented cows. To conclude, dietary vitamin E supplementation to periparturient dairy cows increased plasma and milk vitamin E, decreased SCC in milk, and improved fertility but different energy sources had no effect on any measured variable.
A Baldi; G Savoini; L Pinotti; E Monfardini; F Cheli; V Dell'Orto
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Publication Detail:
Type:  Journal Article; Research Support, Non-U.S. Gov't    
Journal Detail:
Title:  Journal of veterinary medicine. A, Physiology, pathology, clinical medicine     Volume:  47     ISSN:  0931-184X     ISO Abbreviation:  J Vet Med A Physiol Pathol Clin Med     Publication Date:  2000 Dec 
Date Detail:
Created Date:  2001-01-29     Completed Date:  2001-04-05     Revised Date:  2006-11-15    
Medline Journal Info:
Nlm Unique ID:  100955112     Medline TA:  J Vet Med A Physiol Pathol Clin Med     Country:  Germany    
Other Details:
Languages:  eng     Pagination:  599-608     Citation Subset:  IM    
Institute of Animal Nutrition, Faculty of Veterinary Medicine, University of Milan, Milan, Via Celoria 10, 20133, Italy.
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MeSH Terms
Cattle / physiology*
Cell Count / veterinary
Dietary Fats / administration & dosage
Dietary Supplements
Lactation / physiology
Milk / chemistry*,  standards
Postpartum Period
Reproduction / physiology*
Starch / administration & dosage
Vitamin E / administration & dosage*,  analysis*
Reg. No./Substance:
0/Dietary Fats; 1406-18-4/Vitamin E; 9005-25-8/Starch

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