5Atwal A S, M Eskin N A, McDonald B E, et al. The effect of phytate on nitrogen utilization and zinc metabolism in young rats. Nutr. Rep. Int., 1980,21 (2) :257 - 267.
6Biehl R R, Baker D H, DeLuca H F. Alpha - Hy droxylated cholecalciferol compounds act additively with microbialp hytase to improve phosp horus, zinc and manganese utilization in chicks fed soy - based diets. J. Nutr., 1995,125(9) :2407 - 2416.
7Johnston S L, Southern I L. The effect of varying mix uniformity (simulated) of phytase on growth performance, mineral retention and bone mineralization in chicks. Poultry Sci. ,2001(79): 1485- 1490.
8Atwal, A.S., N.A.M Eskin, B.E.McDonald and M.Vvaisey-Genser. The effect of phytate on nitrogen utilization and zinc metabolism in young rats. Nutr. Rep. Int. 1980 21(2):257 - 267.
9Biehl R R, D H Baker, H F DeLuca. Alpha-Hydroxylated cholecalciferol compounds act additively with microbial phytase to improve phosphorus, zinc and manganese utilization in chicks fed soy-based diets[J].J Nutr, 1995, 125(9):2407 - 2416.
10Johnston, S. L. and L. L. Southern. The effect of varying mix uniformity (simulated) of phytase on growth performance, mineral retention and bone mineralization in chicks. Poultry Sci. 2001,79: 1485- 1490.
