Simulation of diets for dairy goats and growing doelings using nonlinear optimization procedures

Revista Brasileira de Zootecnia

Abreu, Matheus Lima Corrêa²  Bendia, Laila Cecília Ramos²  Glória, Leonardo Siqueira¹  Fernandes, Alberto Magno²  Rocha, Norberto Silva³  Gomes, Raphael dos Santos²  Oliveira, Tadeu Silva de²  Rohem Júnior, Nardele Moreno² 

[1] Universidade Federal de Viçosa, Viçosa, Brazil;Universidade Estadual do Norte Fluminense Darcy Ribeiro, Campos dos Goytacazes, Brazil;Universidade Federal dos Vales do Jequitinhonha e Mucuri, Unaí, Brazil

关键词:  decision support system;    diet formulation;    diet optimization;    goat nutritionIntroductionFeeding is one of the most important components of the livestock activity;   

DOI  :  10.1590/S1806-92902016000200005

学科分类：兽医学

来源: Universidade Federal de Vicosa

【 摘 要 】

The objective of this study was to simulate total dry matter intake and cost of diets optimized by nonlinear programming to meet the nutritional requirements of dairy does and growing doelings. The mathematical model was programmed in a Microsoft Excel(r) spreadsheet. Increasing values of body mass and average daily weight gain for growing doelings and increasing body mass values and milk yield for dairy does were used as inputs for optimizations. Three objective functions were considered: minimization of the dietary cost, dry matter intake maximization, and maximization of the efficiency of use of the ingested crude protein. To solve the proposed problems we used the Excel(r) Solver(r) algorithm. The Excel(r) Solver(r) was able to balance diets containing different objective functions and provided different spaces of feasible solutions. The best solutions are obtained by least-cost formulations; the other two objective functions, namely maximize dry matter intake and maximize crude protein use, do not produce favorable diets in terms of costs.

【 授权许可】

Unknown