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- Title
Effect of a bacterial 6-phytase on plasma myo-inositol concentrations and P and Ca utilization in swine.
- Authors
Guggenbuhl, P.; Perez Calvo, E.; Fru, F.
- Abstract
It was investigated if myo-inositol (INO) the end product of phytate degradation was generated by a dietary inclusion of an exogenous phytase and if it could be correlated to the phytase effects on mineral utilization. Two trials were investigated in weaned piglets and growing pigs. All animals were fed, throughout a 30-d experimental period, diets based on corn-soybean meal, either a positive control diet (PC) formulated to meet the animal requirements according to NRC (2012) or a negative control diet (NC) without any mineral P supplementation. The NC diet was supplemented with a phytase at 0, 1,000, 2,000, 3,000, and 4,000 U/kg in piglets and at 0, 125, 250, 500, 1,000, and 2,000 U/kg in growing pigs. At the end of both trials, P and Ca utilization was evaluated and blood samples were taken to determined plasma INO concentrations. Bone-breaking force was determined in piglets. Graded amounts of dietary phytase supplementation increased (P < 0.05) plasma INO concentrations in piglets, and growing pigs confirming that phytic acid has been hydrolyzed in vivo until its end product. In parallel, in both trials, P and Ca utilization and, in piglets, bone-breaking resistance were improved (P < 0.05). Plasma INO concentrations were not fully correlated to P utilization. This may be partly due to its physiological properties and regulation. The increased bone-breaking force could partly be attributed to INO due to its involvement in osteogenesis.
- Subjects
PHYTASES; INOSITOL; BACTERIAL contamination; SWINE nutrition; PHYSIOLOGICAL effects of minerals
- Publication
Journal of Animal Science, 2016, Vol 94, p243
- ISSN
0021-8812
- Publication type
Article
- DOI
10.2527/jas.2015-9803