Abstract
The aim of this paper is to present the method and tool for optimisation of beef-fattening diets. Changes in policy environment and changes in costs of feed pose challenges for farm efficiency. We construct a spreadsheet from two modules based on mathematical deterministic programming techniques. In order to obtain an estimate of the magnitude of costs that may be incurred, the first module utilizes a linear program for least-cost ration formulation. The resulting value is then targeted as a cost goal in the second module. This is supported by weighted goal programming with a penalty function system. The approach presented here is an example of how a combination of mathematical programming techniques might be applied to prepare a user-friendly tool for optimal ration formulations. We report results that confirm this approach as useful, since one is able to formulate a least-cost ration without risking a decrease in the rations nutritive value or affecting the balance between nutrients.;
Highlights
The economic position of the EU beef sector has significantly changed in the past few years
Increased pressures from internal and world markets as a result of trade liberalisation, BSE disease impacts and changes on world supply and demand sides have led to marked market fluctuations, for which most EU beef farmers are not a match (Binfield et al 2004, Balkhausen et al 2005, Breen et al 2005)
We present a spreadsheet tool for beef ration formulation
Summary
The economic position of the EU beef sector has significantly changed in the past few years. This is mainly due to gradual abolition of production coupled with budgetary support. The additional demand for crops for energy uses will lead to higher prices, and better economic positions for arable farmers (Zeller and Häring 2007). This non-feed production and price increase will definitely cause significant issues for the livestock sector, where cereals and other feed crops are indispensable inputs for feed rations
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