Abstract
There is much current interest in the potential of suitable in-feed enzymes to improve digestibility and productive performance in pigs. However, in order to improve the nutritional value of feed by enzyme supplementation it is important to match enzyme characteristics to both the substrates present and the animal species concerned. The main antinutritive factors in wheat are arabinoxylans and they comprise over 50% of the total NSP's in the whole grain. Since monogastric animals do not possess the endogenous enzymes to break down the cell wall structures of wheat, which consist mainly of arabinoxylans, the addition of xylan degrading enzymes should be considered. Therefore, a growth trial in weaner pigs was conducted to evaluate the effect of supplementing a pelleted wheat/soya - based diet with two different xylanase sources (Trichoderma spp.), provided at the same activity levels in a premix (xyl#l and xyl#2). A third enzyme treatment incorporated the same level of xyl#l in conjunction with a protease (pro) obtained from Bacillus subtilis.
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