QUICK SEARCH:   [advanced] Author: Keyword(s): Year:  Vol:  Page:

This Article Full Text (PDF) Purchase Article View Shopping Cart Alert me when this article is cited Alert me if a correction is posted Services Similar articles in this journal Similar articles in PubMed Alert me to new issues of the journal Download to citation manager Citing Articles Citing Articles via HighWire Citing Articles via Google Scholar Google Scholar Articles by Lei, X. Articles by Yokoyama, M. T. Search for Related Content PubMed PubMed Citation Articles by Lei, X. Articles by Yokoyama, M. T.

Supplemental Microbial Phytase Improves Bioavailability of Dietary Zinc to Weanling Pigs^1,2,

Animal Science Department, Michigan State University, East Lansing, MI 48824

Two experiments were conducted to determine the effects of supplemental microbial phytase on utilization of dietary zinc by weanling pigs. Experiment 1 was a 2 x 3 factorial arrangement of treatments with 24 pigs for 4 wk. Two levels of phytase activity (0 and 1350 units/g) and three levels of zinc (0, 30 and 60 mg/kg as ZnSO₄·7H₂O) were added to a corn-soybean meal basal diet. Weekly measures included growth performance, plasma alkaline phosphatase activity and plasma mineral concentrations. In Experiment 2, mineral balances were determined in 12 pigs fed the basal diet or the diet with added zinc (30 mg/kg) or phytase (1350 units/g). The results indicated that either supplemental phytase or supplemental zinc increased plasma alkaline phosphatase activity and plasma zinc concentrations, but these increases were not additive. Supplemental phytase decreased plasma alkaline phosphatase activity in pigs supplemented with zinc. Supplemental phytase also significantly enhanced weight gain, feed intake, gain:feed ratio, plasma concentrations of inorganic phosphorus, and retention of phosphorus and calcium. Neither supplemental phytase nor zinc affected zinc retention. Supplementing corn-soybean meal diets with microbial phytase at 1350 units/g feed improves bioavailability of zinc as well as of phytate phosphorus to weanling pigs.

KEY WORDS: • phytase • phytate • pigs • phosphorus • zinc

¹ Presented in part at the 84th Annual Meeting of the American Society of Animal Science, August 8–11, 1992, Pittsburgh, PA [Lei, X. G., Ku, P. K., Miller, E. R., Ullrey, D. E. & Yokoyama, M. T. (1992) Supplemental dietary microbial phytase improves bioavailability of zinc as well as phytate phosphorus in a corn-soybean meal diet for weanling pigs. J. Anim. Sci. 70 (suppl. 1): 229 (abs.)].

² The costs of publication of this article were defrayed in part by the payment of page charges. This article must therefore be hereby marked "advertisement" in accordance with 18 USC section 1734 solely to indicate this fact.

³ To whom correspondence and reprint requests should be addressed.

Manuscript received 5 October 1992. Revision accepted 9 February 1993.

This article has been cited by other articles:

				T. L. Veum, D. R. Ledoux, M. C. Shannon, and V. Raboy Effect of graded levels of iron, zinc, and copper supplementation in diets with low-phytate or normal barley on growth performance, bone characteristics, hematocrit volume, and zinc and copper balance of young swine1 J Anim Sci, August 1, 2009; 87(8): 2625 - 2634. [Abstract] [Full Text] [PDF]

				A. R. Pagano, K. R. Roneker, and X. G. Lei Distribution of supplemental Escherichia coli AppA2 phytase activity in digesta of various gastrointestinal segments of young pigs J Anim Sci, June 1, 2007; 85(6): 1444 - 1452. [Abstract] [Full Text] [PDF]

				W. Zhang, E. J. Mullaney, and X. G. Lei Adopting Selected Hydrogen Bonding and Ionic Interactions from Aspergillus fumigatus Phytase Structure Improves the Thermostability of Aspergillus niger PhyA Phytase Appl. Envir. Microbiol., May 1, 2007; 73(9): 3069 - 3076. [Abstract] [Full Text] [PDF]