Animal Bioscience

Asian Australasian Association of Animal Production Societies (아세아태평양축산학회)
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Effects of simultaneous supplementation of 3-phytase and 6-phytase on phosphorus and calcium digestibility in growing pigs

  • Received : 2025.10.14
  • Accepted : 2025.11.11
  • Published : 2026.05.01
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Abstract

Objective: The present study aimed to determine the effects of supplemental 3-phytase, 6-phytase, or both on total tract digestibility of phosphorus (P) and calcium in corn-soybean meal-based diets fed to growing pigs. Methods: Twelve barrows with an initial body weight of 63.1±3.0 kg were allotted to a triplicated 4×3 incomplete Latin square design with 4 diets and 3 periods to obtain 9 observations per diet. The experimental diets comprised 1) a control diet based on 73.3% corn and 23.0% soybean meal without inorganic P source or supplemental phytase, 2) the control diet supplemented with 1,000 phytase unit (FTU)/kg of 3-phytase, 3) the control diet supplemented with 1,000 FTU/kg of 6-phytase, and 4) the control diet supplemented with both 3-phytase at 500 FTU/kg and 6-phytase at 500 FTU/kg. Results: Supplemental phytase reduced (p<0.05) the daily P output from pigs regardless of the phytase source or the combination of the 2 phytase sources. The pigs fed the diet supplemented with 6-phytase or both 3-phytase and 6-phytase had less daily P output compared with those fed the diet supplemented with only 3-phytase (p<0.05). The total tract digestibility of P in pigs fed the diet supplemented with both 3-phytase and 6-phytase was greater (p<0.05) than those fed the control diet or the diet supplemented with only 3-phytase. The apparent total tract digestibility of calcium in pigs fed the diet supplemented with 6-phytase or both 3-phytase and 6-phytase was greater compared with the control group (p<0.05). Conclusion: Taken together, supplemental phytase increased P digestibility in corn-soybean meal-based diets fed to growing pigs regardless of the phytase sources and the effects of supplemental phytase on the P and calcium digestibility were most pronounced in the mixture of 3-phytase and 6-phytase.

Keywords

Acknowledgement

This work was supported by the Rural Development Administration (Korea; PJ017087).

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