7Gracia M I, Aranibar M J, Lazaro R, et al. Alpha-amykase supplementation of broiler diets based on corn[J].Poult Sci, 2003,82:436-442.
8Almirall M, Francesch M, Perez-Venderell,et al. The differences in intestinal viscosity produced by barley and β-glucanase alter digesta enzyme activities and ileal nutrient digestibilities more in broiler chicks than in cocks[J].J Nutr, 1995, 125,947-955.
9Hulan H W, Bird F H. Effect of fat level in isonitrogenous diets on the composition of avian pancreatic juice[J].J Nutr, 1972,102:459-468.
10Ziswiler V, Farner D S. Digestion and the digestive system[M].Farner D S, King J R, Parkes K C(eds):Avian Biology. NewYork, NY, Academic, 1972:343-430.
