Effect of vitamin E supplementation on weight gain, immune competence, and disease incidence in barley-fed beef cattle
| Autor: | Caroline Fossum, M. Törnquist, Juhani Hakkarainen, K. Edfors, B. Pehrson |
|---|---|
| Rok vydání: | 1991 |
| Předmět: |
Vitamin
Male medicine.medical_specialty medicine.medical_treatment Vitamin e supplementation Biological Availability Cattle Diseases Biology Beef cattle Weight Gain chemistry.chemical_compound Animal science Immune system Internal medicine Genetics medicine Animals Vitamin E chemistry.chemical_classification Glutathione peroxidase Incidence (epidemiology) Incidence Hordeum Endocrinology chemistry Animal Science and Zoology Cattle medicine.symptom Weight gain Immunocompetence Food Science |
| Zdroj: | Journal of dairy science. 74(3) |
| ISSN: | 0022-0302 |
| Popis: | The aim of the study was to investigate whether vitamin E supplements in larger amounts than recommended could reduce incidence of disease, improve immune competence, and increase rate of weight gain of conventionally barley-fed beef cattle. Mean daily intake of vitamin E by individual calves in the experimental group was 200mg during the first 2 mo, 400mg during the next 2 mo, and 600mg during the rest of the period. Corresponding daily intakes of vitamin E for the control group were 50, 100, and 150mg. Mean plasma vitamin E of the experimental group increased from .49mg/L at the start of the trial to 2.03 mg/L at the end, but that of the control group was lower at the end (.36 mg/L) than at the beginning (.53 mg/L). No significant differences were observed between the groups concerning incidence of disease or magnitude of lymphocyte stimulation. The results indicated that there was a surprisingly poor biological availability of the dietary vitamin. Therefore, a comparison in reality was made between calves with inadequate and normal vitamin E status. The differences in daily BW gain and time to reach slaughter weight thus probably were effects of the low vitamin E status rather than positive effects of additional vitamin in the diet. |
| Databáze: | OpenAIRE |
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