7Bedford M R. The use of enzymes in poultry diets[J]. World Poultry Sci,1999,52:61 -68.
8Bedford M R, H L Classen. Decrease of intestinal viscosity through manipulation of dietary and pentosanase concentration is affected changes in the carbohydrase composition of the intestinal aqueous phase and results in improved growing rate and feed conversion efficiency of broiler chicks[J]. J Nutr, 1992, 122:560 - 569.
9Gill C. Enzyme update[J]. Feed Intemational,2006,27:18- 19.
