Protein-mineral supplementation with and without additive for grazing tropical beef cattle

Lauriston Berteli Fernandes; Raul Franzolin

Lauriston Berteli Fernandes Premix - Suplementação de Resultados
Raul Franzolin Universidade de São Paulo (Brasil)

Abstract

Protein-mineral supplementation with or without an additive (Premium Factor®) was evaluated with 16 Nellore growing beef steers grazing Brachiaria grass pasture in a completely randomized experiment, through the performance characteristics of animals and pasture at 31, 59 and 87 days of grazing from August to October 2009. The study included gain in liveweight and availability of forage dry matter in the form of leaves, stems and dead material. Rate of gain was satisfactory (278 g/d), in spite of the low availability and quality of the sward during the trial period. At 59 d of grazing animals supplemented with Premium Factor had an average weight gain 21.3% higher than those on the treatment without additive, indicating that use of the additive along with supplementation had a positive effect on animal performance under the conditions of this experiment.

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Author Biographies

Lauriston Berteli Fernandes, Premix - Suplementação de Resultados

Zootecnista, UNESP Mestre em Nutrição Animal, USP

Raul Franzolin, Universidade de São Paulo (Brasil)

Veterinarian by Universidade Estadual Paulista Julio de Mesquita Filho, Jaboticabal UNESP, Brazil (1980), Master in Animal Nutrition from the University of São Paulo, USP, São Paulo, Brazil (1984), PhD in Animal Science from UNESP Jaboticabal, Brazil (1990), Post-doctor in rumen microbiology at Ohio State University, Wooster, USA (1993), Professor (1996) and Full Professor at USP (2001), MBA in Management from FUNDACE, Ribeirao Preto, Brazil (2004), Post-doctorate in molecular biology at CSIRO Livestock Industries, Queensland Bioscience Precinct, Brisbane, Australia (2007-2008). Currently holds the position of Full Professor, Chairman of Research and Chairman of International Relations, Faculty of Animal Science and Food Engineering, University of São Paulo, Campus Pirassununga and technical and scientific advisor at Premix supplementation Company. He has experience in Animal Science with an emphasis on water buffalo production and ruminant nutrition. Develops research involving: dynamics, digestion, degradability, fermentation and microbial synthesis and ciliated protozoa population in the rumen; technique in vitro of gas production, nutrition and production of buffaloes and evaluation of the use of additives. It is responsible for teaching courses: Water Buffalo Production, Ruminant Nutrition Practice (Undergraduate); Technological Advances in Ruminal Metabolism and Self-Confidence and Public Speaking Techniques (Graduate) in FZEA / USP.