Relative non-protein nitrogen and true protein supplement for beef cattle in the dry season

• Grant number: 13/14608-0
• Support Opportunities: Scholarships in Brazil - Scientific Initiation
• Start date: August 01, 2013
• End date: July 31, 2014
• Field of knowledge: Agronomical Sciences - Animal Husbandry - Animal Nutrition and Feeding
• Principal Investigator: Gustavo Rezende Siqueira
• Grantee: Lais Atayde dos Santos
• Host Institution: APTA Regional. Agência Paulista de Tecnologia dos Agronegócios (APTA). Secretaria de Agricultura e Abastecimento (São Paulo - Estado). Campinas , SP, Brazil

Abstract

Objective with this study was to evaluate the effect of different levels and rates of protein degradation, coupled with energy use, on the performance of Nellore recreated on Brachiaria brizantha. Marandu in continuous grazing during the dry season. The experiment will be conducted from July to September 2013 and will consist of 14 days of adaptation and three periods of 28 days each, totaling 92 days of evaluation. The treatments are: energy protein supplement with 40% CP (control), energy protein supplement with 40% CP, with one third of the plant and CP 2/3 of chemical, energy protein supplement with 40% CP , and 1/3 of PB of chemical and 2/3 of vegetable origin energy protein supplement with 40% CP, 1/2 PB of chemical origin and 1/2 of vegetable origin. Evaluations of pasture and weighing of animals will be held every 28 days, which will assess the performance of these animals and the average weights of the lot, which will be used for calculations of load adjustment. Samples of the grass will be used for quantitative evaluation of forage. The experimental unit is adopted the picket, which is composed of four animals "testers". The experimental design is a randomized block experimental areas and the blocking factor. Data will be analyzed by using mixed model using the MIXED procedure of SAS version 9.2 (SAS, 2008).