02494naa a2200361 a 450000100080000000500110000800800410001902400510006010000220011124501010013326000090023450001280024352013400037165000190171165000230173065000170175365000180177065000250178865300260181365300120183965300280185165300260187965300170190565300170192265300300193965300230196970000200199270000190201270000190203170000200205070000140207077300480208421243582020-12-30       2020    bl uuuu     u00u1 u    #d7 ahttps://doi.org/10.1017/S17517311200014332DOI1 aMARQUES, J. G. O.  aAn improved algorithm for solving profit-maximizing cattle diet problems.h[electronic resource]  c2020  aIssue S2: Edição do 9th Workshop on Modelling Nutrient Digestion and Utilization in Farm Animals (MODNUT), 2019, Ubatuba.  aFeeding cattle with on-pasture supplementation or feedlot diets can increase animal efficiency and system profitability while minimizing environmental impacts. However, cattle system profit margins are relatively small and nutrient supply accounts for most of the costs. This paper introduces a nonlinear profit-maximizing diet formulation problem for beef cattle based on wellestablished predictive equations. Nonlinearity in predictive equations for nutrient requirements poses methodological challenges in the application of optimization techniques. In contrast to other widely used diet formulation methods, we develop a mathematical model that guarantees an exact solution for maximum profit diet formulations. Our method can efficiently solve an often-impractical nonlinear problem by solving a finite number of linear problems, that is, linear time complexity is achieved through parametric linear programming. Results show the impacts of choosing different objective functions (minimizing cost, maximizing profit and maximizing profit per daily weight gain) and how this may lead to different optimal solutions. In targeting improved ration formulation on feedlot systems, this paper demonstrates how profitability and nutritional constraints can be met as an important part of a sustainable intensification production strategy  aCattle feeding  aLinear programming  aConfinamento  aGado de Corte  aProgramação Linear  aAlimentação de gado  aFeedlot  aFormulação de ração  aNonlinear programming  aOptimization  aOtimização  aProgramação não linear  aRation formulation1 aSILVA, R. de O.1 aBARIONI, L. G.1 aHALL, J. A. J.1 aTEDESCHI, L. O.1 aMORAN, D.  tAnimalgv. 14, S2, p. S257-S266, Aug. 2020.