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Simulation model for particle dynamics in rumen of cattle fed sugarcane diet

By Collao-Saenz Edgar Alain, Dijkstra Jan, Paiva Paulo César de Aguiar, Bannink André, Arcuri Pedro Braga, Teixeira Júlio César, Olalquiaga Pérez Juan Ramón and David Flávia Maria

Abstract

Animal simulation models are sets of equations used to describe biological processes. A non-steady state simulation model of cattle digestion is presented in order to represent nutrient availability as a response to feed intake pattern and the kinetics of particle size reduction. Variables representing the particle size reduction and discontinuous voluntary feed intake were included in a mechanistic model created to optimize the supplementation of sugarcane based diets. In general the predicted values were very close to observed values for fibre and nitrogen flows. The model has not shown consistent bias in relation to the behavior of the observed data of duodenal flow of neutral detergent fiber and non-ammonia nitrogen. Milk production simulations were quite close to actual values. Predictions were improved by the non steady-state model, taking into account variable intake rate in relation to the previous steady-state model. The model can be used to select strategies for supplementation of cattle fed sugarcane based diets

Topics: dairy cows, milk production, modeling, rumen, Agriculture (General), S1-972, Agriculture, S, DOAJ:Agriculture (General), DOAJ:Agriculture and Food Sciences
Publisher: Universidade de São Paulo
Year: 2005
OAI identifier: oai:doaj.org/article:feb028b1aabe4ae1b9f2004b2843b87e
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  • https://doaj.org/toc/0103-9016 (external link)
  • http://www.scielo.br/scielo.ph... (external link)
  • https://doaj.org/article/feb02... (external link)
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