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- Title
Effect of high dietary doses of a bacterial 6-phytase in piglets fed a corn-soybean meal diet.
- Authors
Guggenbuhl, P.; Calvo, E. P.; Fru, F.
- Abstract
The effects of high doses of dietary phytase on performance, mineral utilization, plasma biochemical parameters, and myo-inositol and bone strength were evaluated in seventy-two 28-d-old weaned piglets. They were randomly assigned into 6 groups of 12 animals with 3 piglets per pen and 4 replicate pens per group and fed ad libitum, throughout a 28-d period, a corn-soybean meal based diet either with recommended nutrient levels (positive control) or with reduced nutrient levels (matrix control [MC]). Phytase was supplemented to the MC diet at 0, 1,000, 2,000, 3,000, and 4,000 units/kg. Average daily gain was increased (P < 0.05) and feed conversion ratio was improved (P < 0.05) in piglets fed diets supplemented with 2,000, 3,000, and 4,000 units phytase/kg compared with piglets fed the MC diet. Fecal concentrations and excretions of P and Ca were decreased (P < 0.05) and P and Ca apparent total tract digestibility and apparent absorption were increased (P < 0.05) in the piglets fed the diets with phytase compared with piglets that received the MC diet. Plasma myo-inositol and P were increased (P < 0.05) whereas Ca, alkaline phosphatase, and glucose were decreased (P < 0.05) in presence of phytase. Bone strength was increased (P < 0.05) in piglets fed diets supplemented with phytase. The effects of phytase indicated that there was sufficient phytate in the diets to test high doses of the enzyme. The high dietary phytase-induced high plasma concentrations of myo-inositol may indicate that this compound is partially involved in the increased ADG.
- Subjects
DIETARY supplements; PHYTASES; PIGLET nutrition; PIGLETS; DIET; PHYSIOLOGY; ANIMAL health
- Publication
Journal of Animal Science, 2016, Vol 94, p307
- ISSN
0021-8812
- Publication type
Article
- DOI
10.2527/jas.2015-9807