3Wang D, Zeng Z K, Piao X S, et al. Effects of keratinase supple- mentation of corn-soybean meal based diets on apparent ileal amino acid digestibility in growing pigs and serum amino acids, cytokines, immunoglobulin levels and loin muscle area in nursery pigs [J]. Archives of Animal Nutrition, 2011, 65 (4): 290-302.
4Hendon D R, Walsh G A. Enyzymes in Animal Nutrition[J]. 1993, 56(6):233-240.
5Zamora V, Figueroa J L, Reyna L. Growth performance, carcasscharacteristics and plasma urea nitrogen concentration of nursery pigs fed low protein diets supplemented with glueomannans or pro- tease [J]. J Appl Anita Res,2011, 39: l, 53-56.
6Hosoyama H, Obata A, Tsuji H, et al. Studies on the reduction of soybean allergenicity: Part 1 [M]. Nippon Nogeikagaku Kaishi, 1994: 343.
7Bernard K, McNab J. M. Effect of Allzyme Vegpro on true amino acid digestibility of Canadian 48% crude protein soybean meal fed to either three week old chicks or adult cockerels [C]. In: Biotechnology in the Feed Industry-Proceedings of Alhech's 13th Annual Symposium, Poster Presentation, 1997.