Supplementation with zilpaterol hydrochloride in lambs finished with a non-forage fiber diet
A total of crossbred hair sheep were distributed under a completely randomized block design in two treatments for evaluation the effect of supplementation of a non-forage fiber finishing diet with generic zilpaterol hydrochloride (ZH; 0 vs 10 mg/d/animal) on the production behavior, the characteristics of the carcass, the primary cuts yield, and the weight of the waste expressed as a percentage of the weight at slaughter. The home pen behavior was tested during 30 d, and subsequently half the animals under each treatment (n= 6) were slaughtered. Supplementation with ZH did not affect the weight gain, but it improved (P≤0.02) the feedlot performance, the carcass weight and yield, and the area of the Longissimus dorsi muscle, as well as the yield of the leg and the whole loin. Both the KPH and the mesenteric fat diminished (P≤0.05) due to ZH. The rest of the percentages of waste of the carcass remained unaffected by ZH. It can be concluded that daily supplementation of the diet with generic ZH improved the deposition of muscle mass through deposition of internal fat, favoring the feedlot performance of sheep fattened with a non-forage fiber diet.
| Main Authors: | , , , , , , , |
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| Format: | Digital revista |
| Language: | spa eng |
| Published: |
Instituto Nacional de Investigaciones Forestales, Agrícolas y Pecuarias
2020
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| Online Access: | https://cienciaspecuarias.inifap.gob.mx/index.php/Pecuarias/article/view/5149 |
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