Abstract
The effect of dietary energy source on performance and nutrient digestibility in growing pigs
Highlights
The relationship between dietary energy content, feed intake and pig performance is complex and despite being an area of considerable research focus, the relationship is not yet completely understood
There is a lack of information in the literature on the utilization of energy from cereal or from oil when pigs are offered feed ad libitum and it is important that this is addressed as ad libitum access may result in higher than expected feed intakes despite the anticipated 'gut-fill' effect of higher fibre diets
An interaction between fat and fibre has been reported by O'Doherty et al (2002), who observed that the inclusion of 50 g/kg fat (60:40% tallow and palm oil) improved (P
Summary
The relationship between dietary energy content, feed intake and pig performance is complex and despite being an area of considerable research focus, the relationship is not yet completely understood. There is a lack of information in the literature on the utilization of energy from cereal or from oil when pigs are offered feed ad libitum and it is important that this is addressed as ad libitum access may result in higher than expected feed intakes despite the anticipated 'gut-fill' effect of higher fibre diets. Pigs offered by-product-based diets plus 50 g/kg oil performed worse than those offered cereal-based diets without oil This may be a result of the digestible energy (DE) content of the added oil being overestimated, or due to an interaction between the oil and fibre dietary components. Myer and Combs (1991) concluded that supplemental fat improved feed conversion efficiency with both low and high fibre diets and Overland et al (1999) reported that pigs converted dietary energy from low-fat, high-fat, barley and oat based-diets with similar efficiency
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