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(Reference retrieved automatically from Web of Science through information on FAPESP grant and its corresponding number as mentioned in the publication by the authors.)

Does virginiamycin supplementation affect the metabolism and performance of Nellore bulls grazing under low and high gain rates?

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Author(s):
Costa, Joao Paulo R. [1] ; De Jesus, Raphael B. [1] ; Oliveira, Ivanna M. [2, 1] ; Resende, Flavio D. [2, 1] ; Siqueira, Gustavo R. [2, 1] ; Malheiros, Euclides B. [1]
Total Authors: 6
Affiliation:
[1] UNESP Univ Estadual Paulista, Dept Anim Sci, Jaboticabal - Brazil
[2] APTA, Dept Anim Sci, BR-14770000 Colina, Rui Barbosa - Brazil
Total Affiliations: 2
Document type: Journal article
Source: ANIMAL SCIENCE JOURNAL; v. 89, n. 10, p. 1432-1441, OCT 2018.
Web of Science Citations: 1
Abstract

This study aimed to evaluate the effect of virginiamycin on the metabolism and performance of growing Nellore bulls under low and high gain rates on pasture. In experiment 1, 80 Nellore bulls (age=12 +/- 2months, body weight=258 +/- 15kg) were assigned to 16 paddocks in a 2x2 randomized block factorial arrangement. In experiment 2, 12 cannulated Nellore bulls were assigned to three 4x4 balanced Latin squares. The factors were: (1) mineral salt without or with virginiamycin, and (2) low or high gain rate. No interaction was noted between factors (p>.10). Animals fed virginiamycin had greater average daily gain (14%, p<.01), body weight (11kg, p=.05), plasma nonesterified fatty acid (20%, p<.01), serum calcium concentration (2.62%, p=.04), and total protozoa (p=.03) and had the same bacterial proportion (p>.27). Animals with a low gain rate had greater serum urea concentration (19.6%, p<.01) and ruminal ammonia nitrogen (62%, p<.01). Thus, virginiamycin increases the performance and changes the metabolism of growing Nellore bulls under low and high gain rates on pasture. (AU)

FAPESP's process: 13/10340-3 - Feeding Strategies in the Growing and Finishing Cattle Nelore
Grantee:Ivanna Moraes de Oliveira
Support Opportunities: Scholarships in Brazil - Post-Doctoral
FAPESP's process: 16/01961-2 - Meta-analysis of different nutritional plans during the post-weaning phase and its impact on the finishing of beef cattle in tropical regions
Grantee:Ivanna Moraes de Oliveira
Support Opportunities: Scholarships abroad - Research Internship - Post-doctor