8Baas T C,Thacker P A.lmpact of gastric pH on dietary,enzyme activity and survivability in swine fed β-glucanase supplemented diets [J].Can J Anim Sci, 1996,76:245-252.
9Bedford M R.Mechanism of action and potential environmental benefits form the use of feed enzymes [J].Animal Feed Science Technology, 1995,53:145-155.
