Evaluation of a model to estimate the nutritional requirements and performance of dairy calves

• Grant number: 14/12475-6
• Support Opportunities: Scholarships abroad - Research Internship - Doctorate
• Start date: October 01, 2014
• End date: March 31, 2015
• Field of knowledge: Agronomical Sciences - Animal Husbandry - Animal Nutrition and Feeding
• Principal Investigator: Dante Pazzanese Duarte Lanna
• Grantee: Veridiana Lourenço de Souza
• Supervisor: James K. Drackley
• Host Institution: Escola Superior de Agricultura Luiz de Queiroz (ESALQ). Universidade de São Paulo (USP). Piracicaba , SP, Brazil
• Institution abroad: University of Illinois at Urbana-Champaign, United States
• Associated to the scholarship: 12/14948-3 - Parametrization and evaluation of a model to estimate the requirements and performance of dairy cows for use in Brazil, BP.DR

Abstract

Mathematical models are important tools to estimate the nutritional requirements and performance of animals, to reduce cost of production and minimize the excretion of nutrients to the environment. Very few models have been evaluated to estimate the requirements and performance of young calves in tropical condition. The objective of this project is to evaluate the National Research Council (NRC, 2001) model and the updates published by Amburgh and Drackley (2005) to estimate the nutritional requirements and performance for dairy calves in tropical conditions. The data used to evaluate the models will be collected from studies from University of São Paulo and other Brazilian Universities. In this study, will be used the growth and feed composition data for predicting energy allowable average daily gain (ADG) and the ADG allowed by the amount of protein in the diet (protein allowable ADG). For evaluation will be used analysis mean square error of prediction (MSEP), mean bias, concordance correlation coefficient (CCC) and analysis of linear regression. The main contribution of project will be to verify the accuracy of the models for estimates the requirements and performance of dairy calves in tropical conditions. (AU)

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)

SOUZA, V. L.; DRACKLEY, J. K.; ALMEIDA, R.; BITTAR, C. M. M.; ALBERTINI, T. Z.; MORRISON, S. Y.; LANNA, D. P. D.. Evaluation of nutrition models to estimate performance of young dairy calves: a meta-analytical study under tropical conditions. ANIMAL, v. 10, n. 12, p. 1965-1974, DEC 2016. (14/12475-6)