Supplementation and use of virginiamycin as modulators of Nellore cattle performance in the rearing phase and its effects on feedlot finishing

• Grant number: 14/24341-4
• Support Opportunities: Scholarships in Brazil - Doctorate
• Start date: March 01, 2015
• End date: February 28, 2017
• Field of knowledge: Agronomical Sciences - Animal Husbandry - Animal Production
• Agreement: Coordination of Improvement of Higher Education Personnel (CAPES)
• Principal Investigator: Gustavo Rezende Siqueira
• Grantee: Flávio Pinto Monção
• Host Institution: Agência Paulista de Tecnologia dos Agronegócios (APTA). Secretaria de Agricultura e Abastecimento (São Paulo - Estado). São Paulo , SP, Brazil

Abstract

This project aims to determine the effect of virginiamycin (VM) on two rates of weight gain (with or without protein-energy supplementation) and in different seasons and to evaluate the effect of supplementation on animal performance during the rearing phase and on the time of finishing of feedlot animals. Tester animals will consist of 168 post weaning Nellore cattle, uncastrated, with average body weight of 200 kg. We will evaluate two nutritional plans: 1) low weight gain, where animals receive mineralized salt in the rainy period and salt-urea in the dry period, and 2) moderate/high level of weight gain, in which animals receive protein-energy supplement at 0.3% body weight. Also, the effect of adding virginiamycin to each nutritional plan will be assessed. The experiment will consist of a 2 x 2 factorial arrangement, the factor 1 will be the nutritional plan and the factor 2 will be additive. Each treatment will have 42 experimental animals, divided into 3 blocks according to the weight class (light, medium and heavy). The VM dose to be used will be 40 mg/100 kg body weight. Evaluations of animal performance and pasture will be made with a randomized complete blocks design in a 2x2 factorial arrangement, the blocks will be the experimental areas and factors will be the inclusion or not of virginiamycin and two nutritional plans (with and without supplementation). In the feedlot, we will use a split plot randomized block design, 2 x 2 x 2, with the factor 1 being the nutritional plan, the factor 2, the additive effect, and the factor 3, the feedlot period. (AU)

Academic Publications

(References retrieved automatically from State of São Paulo Research Institutions)

MONÇÃO, Flávio Pinto. Supplements and virginiamycin use as performance modulators of cattle Nelore in growth phase and its effects on termination in feedlot. 2017. Doctoral Thesis - Universidade Estadual Paulista (Unesp). Faculdade de Ciências Agrárias e Veterinárias. Jaboticabal Jaboticabal.