Effects of feeding lubabegron on gas emissions, growth performance, and carcass characteristics of beef cattle housed in small-pen environmentally monitored enclosures during the last 3 mo of the finishing period
| العنوان: | Effects of feeding lubabegron on gas emissions, growth performance, and carcass characteristics of beef cattle housed in small-pen environmentally monitored enclosures during the last 3 mo of the finishing period |
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| المؤلفون: | Frank M. Mitloehner, J B Allen, J C Kube, C T Herr, M. S. Brown, Yuee Pan, Dustin Dee Boler, Anna C Dilger, S. L. Gruber, J S Teeter, J A Hagenmaier, Yongjing Zhao, Samantha J. Werth |
| المصدر: | Journal of animal science, vol 99, iss 12 Journal of Animal Science |
| بيانات النشر: | Oxford University Press (OUP), 2021. |
| سنة النشر: | 2021 |
| مصطلحات موضوعية: | Dairy & Animal Science, Feedlot cattle, Food animal, Animal Health and Well Being, Population, Beef cattle, Food and drug administration, Adrenergic Agents, Animal science, Carcass weight, Genetics, medicine, Animals, education, education.field_of_study, Agricultural and Veterinary Sciences, Gas emissions, General Medicine, Biological Sciences, Animal Feed, carcass characteristics, Diet, feedlot cattle, Tenderness, tenderness, ammonia gas emissions, lubabegron, Body Composition, AcademicSubjects/SCI00960, Environmental science, Cattle, Female, Animal Science and Zoology, Gases, medicine.symptom, environment, Food Science |
| الوصف: | The development of technologies that promote environmental stewardship while maintaining or improving the efficiency of food animal production is essential to the sustainability of producing a food supply to meet the demands of a growing population. As such, Elanco (Greenfield, IN) pursued an environmental indication for a selective β-modulator (lubabegron; LUB). LUB was recently approved by the United States Food and Drug Administration (FDA) to be fed to feedlot cattle during the last 14 to 91 d of the feeding period for reductions in gas emissions/kg of unshrunk final BW and HCW. A 4 × 2 factorial arrangement of treatments was used with the factors of dose (0.0, 1.38, 5.5, or 22.0 mg·kg−1 DM basis) and sex (steers or heifers). Three 91-d cycles were conducted (112 cattle/cycle) with each dose × sex combination being represented by a single cattle pen enclosure (CPE; 14 cattle/CPE) resulting in a total of 168 steers and 168 heifers (n = 6 replicates/dose). There were no interactions observed between dose and sex for any variable measured in the study (P ≥ 0.063). Five gases were evaluated for all pens based on CPE concentrations relative to ambient air: NH3, CH4, N2O, H2S, and CO2. Cumulative NH3 gas emissions were reduced by feeding cattle 5.5 and 22.0 mg·kg−1 LUB (P ≤ 0.023) and tended (P = 0.076) to be lower for the cattle fed 1.38 mg·kg−1 LUB compared with the negative controls (CON). The cumulative NH3 gas emission reductions of 960 to 1032 g, coupled with HCW increases (P ≤ 0.019) of 15 to 16 kg for all LUB doses vs. CON, led to reductions in NH3 gas emissions/kg HCW for all three LUB treatments (P ≤ 0.004). Similar to HCW, reductions in NH3 gas emissions/kg of unshrunk final BW were observed for all LUB doses (P ≤ 0.009) and were attributable to both decreases in NH3 gas emissions and numerical increases in BW. Dose had no effect on cumulative emissions or emissions standardized by BW or HCW for the other four gases (P ≥ 0.268). LUB is a novel tool to reduce emissions of NH3 gas per kilogram of unshrunk live BW and hot carcass weight. |
| وصف الملف: | application/pdf |
| تدمد: | 1525-3163 0021-8812 |
| URL الوصول: | https://explore.openaire.eu/search/publication?articleId=doi_dedup___::2e30e3be9a69dfe85a4aacf66a289196 https://doi.org/10.1093/jas/skab338 |
| حقوق: | OPEN |
| رقم الأكسشن: | edsair.doi.dedup.....2e30e3be9a69dfe85a4aacf66a289196 |
| قاعدة البيانات: | OpenAIRE |
| تدمد: | 15253163 00218812 |
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