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Effects of monensin, virginiamycin and functional oils Essential® on the abrupt change to high concentrate diets for Nellore catte

Grant number: 11/19487-1
Support Opportunities:Regular Research Grants
Duration: February 01, 2012 - January 31, 2014
Field of knowledge:Agronomical Sciences - Animal Husbandry - Animal Nutrition and Feeding
Principal Investigator:Paulo Roberto Leme
Grantee:Paulo Roberto Leme
Host Institution: Faculdade de Zootecnia e Engenharia de Alimentos (FZEA). Universidade de São Paulo (USP). Pirassununga , SP, Brazil


The rapid adaptation of cattle to high-concentrate diets is needed to make the most of compensatory gain without harming the health of the animals. Management practices adopted in this period is reflected in the performance of the animal during all the feeding period. The additives are manipulators of the rumen fermentation through the selection of gram-negative bacterias, which reduces the occurrence of metabolic disorders and contribute to improved animal performance. The aim of this study is to evaluate the inclusion effects of monensin, virginiamycin and functional oils Essential® for Nellore cattle, undergoing abrupt change to grain diets, and to evaluate the ingestive behavior, performance, blood metabolic profile, rumen health (ruminites rates and liver abscesses) and carcass characteristics. Forty eight Nellore steers, (initial BW ± 350 Kg), 20 months of age, will be confined for 70 days. The animals distribuition among the four treatments will be: A) control diet + 30 ppm monensin, B) control diet + 40 ppm monensin; C) control diet + 30 ppm monensin+ 15 virginiamycin D) control diet + 400 ppm of Essential® in a randomized complete block design with 12 repetitions. The final results will allow to verify how the additives interfere with abrupt change to high concentrate diets interfere at the performance, carcass quality and health parameters in the rumen. (AU)

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Scientific publications
(References retrieved automatically from Web of Science and SciELO through information on FAPESP grants and their corresponding numbers as mentioned in the publications by the authors)
SILVA, A. P. DOS S.; ZOTTI, C. A.; CARVALHO, R. F.; CORTE, R. R.; CONSOLO, N. R. B.; SILVA, S. DA L. E; LEME, P. R.. Effect of replacing antibiotics with functional oils following an abrupt transition to high-concentrate diets on performance and carcass traits of Nellore cattle. ANIMAL FEED SCIENCE AND TECHNOLOGY, v. 247, p. 53-62, . (11/15818-3, 11/19487-1)

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