| Autor: |
E.M. Domby, J.S. Schutz, Terry E Engle, K.L. Neuhold, M.E. Branine, John J. Wagner, Dale R. Woerner |
| Rok vydání: |
2013 |
| Předmět: |
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| Zdroj: |
The Professional Animal Scientist. 29:566-574 |
| ISSN: |
1080-7446 |
| DOI: |
10.15232/s1080-7446(15)30286-2 |
| Popis: |
A total of 432 crossbred yearling steers (329 ± 10.5 kg) were used in an unbalanced randomized block design to examine the effects of a medicinal feed additive (MFA) program and dietary sulfur (S) concentrations on feedlot performance and carcass merit. Treatments were arranged in a 2 × 2 factorial, with main factors being ionophore and antibiotic combination consisting of feed additive program monensin/tylosin or laidlomycin propionate/chlortetracycline and dietary S concentration [constant (CST) or variable (VAR)]. High-S diets (0.60% S) were fed on randomly assigned days to the VAR treatment, with low-S diets (0.48% S) fed on remaining days and to the CST treatment throughout the experiment. No interactions between S and MFA treatment were apparent for feedlot performance. Steers receiving VAR had greater (P |
| Databáze: |
OpenAIRE |
| Externí odkaz: |
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