Efficacy of laidlomycin propionate for increasing rate and efficiency of gain by feedlot cattle
| Autor: | A. Olmsted, R. A. Zinn, J. P. Fontenot, J. G. Riley, L. L. Berger, D. R. Gill, M. I. Wray, H. R. Spires |
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| Rok vydání: | 1990 |
| Předmět: |
Male
medicine.medical_specialty Feed consumption Feedlot cattle Ruminant animal Biology Weight Gain Feed conversion ratio Eating Animal science Internal medicine Genetics medicine Animals Monensin Dose-Response Relationship Drug General Medicine Animal Feed Endocrinology Feedlot Energy density Cattle Digestion Female Animal Science and Zoology Energy Intake Laidlomycin propionate Food Science |
| Zdroj: | Journal of Animal Science. 68:3382 |
| ISSN: | 0021-8812 |
| Popis: | One thousand twenty steers and heifers were used in six feeding trials to examine the influence of laidlomycin propionate on feedlot performance and to determine the most efficacious dietary concentrations of that ionophore. Cattle were fed diets ranging in energy content from 1.08 to 1.49 Mcal NEg/kg of DM. Laidlomycin propionate improved rate of gain and feed conversion in both steers and heifers. Improvements in performance were not evident when laidlomycin propionate was fed at only 3 mg/kg. However, both average daily gain and feed conversion were improved by laidlomycin propionate within the range of 6 to 12 mg/kg of DM (P less than .001). Feed consumption was not substantially affected by inclusion of laidlomycin propionate in the diet. Improvements in ADG and feed conversion were greater on lower-energy diets than on higher-energy diets, but both these performance characteristics were improved regardless of the type of diet fed. Average daily gain was maximized with laidlomycin propionate at 6 mg/kg, whereas improvements in feed conversion were sustained through 12 mg/kg. Carcasses of cattle fed diets containing 6 to 12 mg/kg of laidlomycin propionate weighed 7.3 kg more (P less than .001) than carcasses of cattle fed the control diets. Yield grade and quality grade were not affected by laidlomycin propionate (P greater than .05). |
| Databáze: | OpenAIRE |
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