Impacts of dietary supplemental phytase and inulin on bone mechanical and chemical properties of young pigs.
2008
C. A. Faber, K. R. Roneker | Xin Gen Lei
Enhancing peak bone mass and integrity early in life may reduce or delay osteoporosis. We explored benefits of supplementing phytase and inulin in a P-adequate, corn-soybean meal basal diet (BD) on bone development in young pigs. The present study was conducted with 35 weanling pigs (8.5 ± 1.6 kg) to compare the effects of supplementing a bacterial phytase at 3,500 units/kg (OptiPhos, JBS United, Sheridan, IN) and inulin at 4% (Synergy-1, Orafti, Tienen, Belgium) on bone mechanical and chemical properties. Pigs were fed BD, BD + phytase, BD + inulin, or BD + phytase + inulin for 5 wk. Five pigs were euthanized from each diet group to collect the femur. Supplemental inulin exerted marginal (P = 0.06 to 0.08) effects on femur height, modulus elasticity, and cancellous bone ash concentration. Cortical bone concentrations (ash basis) of Mg, Na, Sr, and Zn were altered (P < 0.05) by both supplements, whereas the concentration of S was affected only by phytase and those of Ca and P were affected only by inulin. In cancellous bone, phytase enhanced (P < 0.05) concentrations of Sr and Zn while inulin enhanced (P < 0.05) concentrations of Ca and Mg. The two supplements affected (P < 0.05) S concentration and displayed an interaction (P < 0.05) on Mg and P concentrations in cancellous bone. In conclusion, a short-term supplementation of phytase and inulin to the plant-based diet was able to alter the mineral proof of femur bone ash in young pigs.
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