8Friesen O D. Quenter W, Marquardt R R,Rotter B A.The effect of enzyme supple me ntation on the apparent metabolizabel energy and nutrient digestibility of wheat,barety,oats and rye for the yong broiler chick.Poultry Sci,1992,38:710-721.
9De Silva et al.Effects of wheat and β-glucanese treatment on non-starch polysaccharides in endospem of low and high viscous barley.Swedish Journal of Agriculture.1983,13:211-219.
10Annison G. Relationship between the levels of soluble nonstarch polysccaharides and the apparent metabolizable energy of wheats assayed in broiler chickens. J of Agric and Food Chem.1991,29:1252-1256.