4Cromwell G L, T S Stahly, R D Cofffey, et al. Efficacy of phytase in improving the bioavailability of phophorus in soybean meal and corn--soybean meal diet for pigs. J Anim Sci , 1993; 71 (7):1831 - 1840.
5Perney KM, Cantor A H, StrawM L, et al. The effect ofdictary phytase on growth performance and phosphorus utilization of broiler chicks. Poult Sci, 1993, 72(11 )2106 -2114.
6L G Young, M Leunissen, J L Atkinson. Addition of microbial phytase to diets of young pigs. J Anim Sci, 1993, 71: 2147- 2150.
7PHILLIPPY B Q, WYATT C J. Degradation of phytate in foods by phytases in fruit and vegetable extracts[J]. Journal of Food Science, 2001, 66(4): 535-539.
8CHEN W, YE L, GUO F, et al. Enhanced activity of an alkaline phytase from Bacillus subtilis 168 in acidic and neutral environments by directed evolution[J]. Biochemical Engineering Journal, 2015(98): 137-143.
9GAIND S, SINGH S. Production, purification and characterization of neutral phytase from thermotolerant Aspergillus flavus ITCC 6720[J]. International Biodeterioration & Biodegradation, 2015(99): 15-22.
10KEROVUO J, LAURAEUS M, NU1KMINEN P, et al. Isolation, characterization, molecular gene cloning, and sequencing of a novel phytase from Bacillus subtilis[J]. Applied and Environmental Microbiology, 1998, 64(6): 2079-2085.