Effects of Dietary Inclusion of Chromium Propionate and Calcium Propionate on Glucose Disposal and Gastrointestinal Development in Dairy Calves
| Autor: | T.A. Tarifa, José María Fernández, B.T. Crochet, C L DePew, J.C Lovejoy, L. D. Bunting |
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| Rok vydání: | 2000 |
| Předmět: |
Blood Glucose
Chromium Male medicine.medical_specialty Animal feed medicine.medical_treatment Fatty Acids Nonesterified Animal science Milk substitute Internal medicine Glucose Intolerance Insulin Secretion Genetics medicine Animals Insulin Dry matter Least-Squares Analysis Dairy cattle chemistry.chemical_classification Glucose tolerance test medicine.diagnostic_test Metabolism Glucose Tolerance Test Animal Feed Dairying Glucose Endocrinology chemistry Food Fortified Propionate Calcium Cattle Female Animal Science and Zoology Propionates Digestive System Food Science |
| Zdroj: | Journal of Dairy Science. 83:2491-2498 |
| ISSN: | 0022-0302 |
| DOI: | 10.3168/jds.s0022-0302(00)75141-1 |
| Popis: | In experiment 1, 21 male Holstein calves (43.9 kg) were fed only milk replacer at 1.4% of their body weight as dry matter for 6 wk. Dietary treatments included a commercial milk replacer (22% protein, 15% fat) containing (dry basis) either 6.4% Ca propionate or 6.4% dextrose (control) and either 0 or 0.5 mg/kg of supplemental Cr as Cr propionate. Neither Cr nor Ca propionate affected body weight gain; however, Ca propionate tended to increase the growth of the entire foregut measured after slaughter at 6 wk of age. A Minimal Model glucose tolerance test indicated that insulin sensitivity was not affected by treatment. However, calves fed Cr had higher glucose disappearance indexes than controls when propionate was not fed (0.013 vs. 0.019 units) but similar clearance when propionate was included (0.018 vs. 0.018 units, Cr x P interaction). The area under the glucose response curves after propionate-loading tests was much greater for calves fed the Cr versus control replacer when propionate was not present; however, when propionate was included, the response was less dramatic. In experiment 2, 25 Holstein calves were used to study performance and metabolic responses when milk replacer, and then postweaning starter, were supplemented with 0.5 mg/kg of Cr as Cr propionate. The metabolic responses of these calves were not affected by treatment. Overall, combined data suggested that supplemental Cr may improve glucose effectiveness; however, these responses seemed to be attenuated by supplemental propionate. |
| Databáze: | OpenAIRE |
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