A new feed evaluation system for pigs has been developed in Denmark based on new principles. Traditionally, feed evaluation is based on either digestible, metabolizable or net energy. The new feed evaluation system is based on the potential physiologically available energy with direct relation to feed nutrient composition.

The new Danish feed evaluation system for pigs is unique compared to present systems in other countries, which are all based directly on results from animal trials. In general, the limitations in these systems are that they assume that the feed value in the practical farm situation corresponds to results obtained in trials carried out under specific research conditions.

The most important requirement for correct feed evaluation is correct information about the relative energy contribution from the individual nutrients.

Feed evaluation in the new system is a step-wise process in which the actual value of the individual feed component depends on its contribution to the complete diet. The feed’s value also depends on how it is used in the production according to the requirements and feed uptake of the animal.

The publication: A New Concept for Practical Feed Evaluation Systems, DJF Rapport Husdyrbryg nr. 79, 2007 can be downloaded or bought from Else Høgh, telephone: +45 8999 1028.