1Depassille A M, Pelletier B G, Menard J, et al. Relationship of weight gain and behavior to digestive organ weight and enzyme activities in piglets [J]. Animal Science, 1989,670:2921-12929.
2Russell J R. Effect of dietary corn starch intake on pancreatic amylase and intestinal maltase and pH in cattle[J]. Animal Science, 1981,52:1177-1182.
3Siddons R C. Carbohydrase activities in bovine digestive tract[J]. Biochemical , 1986,108 : 839 - 844.
4Hibbard B,Peters J P,Shen R Y W,et al. Effect of recombinant porcine somatotropin and dietary protein on pancreatic digestive efizyme in the pig[J]. Journal of Animal Science, 1992,70:2188-2194.
5Kreikemier K K, Harmon D L. Influence of dietary forage and feed intake on carbohydrase activities and small intestinal morphology of calves[J]. Journal of Animal Science, 1990,68:2916-2929.
6Wang X B,Ogawa T,Suda S,et al. Effects of nutritional level on digestive enzyme activities in the pancreas and intestine of calves slaughtered at same body weight[J]. Asian-Australian Journal of Animal Science, 1998,11 (4) : 375-380.
7Owsley W F,Orr D E,Tribble I F. Effect of age and diet on the development of the pancreatic and synthesis and secretion of pancreatic enzyme in the young pigs [J]. Animal Science, 1986,63: 497 - 504.
8Aumaitre A, Corring T. Development of digestive enzymes in the piglet from birth to 8 weeks [J] . Nutrition and Metabolism, 1978,22: 244-255.