Abstract
The responses of pigs to diets supplemented with enzymes have been variable (review by Partridge, 2000). The situation has not been eased due to an uncertainty over the usefulness of laboratory analyses of enzyme activity as a measure of performance. One issue has been the temperature of feed pelleting in which laboratory assays for apparent enzyme activity have shown very low levels compared with the known level included in the feed, whereas experimental data have indicated typical poultry responses from the enzyme-supplemented feed (Bedford and Pack, 1998). The experiment reported here studied the performance of pigs fed diets to which enzymes were added either pre-or post- pelleting (which was conducted at 850 C).
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