a1 Institute of Animal Nutrition and Feed Tech., University of Agriculture, Faisalabad, Pakistan
a2 University of Agriculture Faisalabad, Sub-Campus Toba Tek Singh, Pakistan
With a growing population, feeding competition between human and animals is increasing. Because major ingredients used in animal feeds, especially in poultry diets are now being used in human nutrition, there is a decreased availability of quality feed resources and poultry feeds are becoming costly. Guar meal is an easily available and economical feed ingredient and may be helpful in alleviating this problem. A large quantity of guar is processed in the world for gum extraction and residue left over from processing is converted into guar meal. It has a good amino acid profile with crude protein contents of about 33-45%. However, anti-nutritional components like guar gum (β-mannan), saponins and trypsin inhibitors limit the use of guar meal in broiler diets. These anti-nutritional factors have been reported to depress growth in birds but at lower levels some of these (β-mannan and saponins) have positive effects on bird health and performance. β-mannan is considered a major anti-nutritional factor when higher levels of guar meal are used in poultry. To improve the utilisation of such feeds, β-mannanases are used. This paper reviews some benefits and drawbacks regarding the use of guar meal in poultry diets and how to improve its feeding value.
(Received August 11 2011)
(Accepted October 13 2011)