S. Gebert et al., Phytase and vitamin E in the feed of growing pigs: 1. Influence on growth,mineral digestibility and fatty acids in digesta, J ANIM PHYS, 81(1), 1999, pp. 9-19
Citations number
44
Categorie Soggetti
Veterinary Medicine/Animal Health
Journal title
JOURNAL OF ANIMAL PHYSIOLOGY AND ANIMAL NUTRITION-ZEITSCHRIFT FUR TIERPHYSIOLOGIE TIERERNAHRUNG UND FUTTERMITTELKUNDE
In a 2 x 2 factorial design, 40 growing-finishing pigs (barrows) from 26 to
106 kg body weighs were used to determine the influence of dietary phytase
(0 or 1200 PTU) and/or alpha-tocopheryl acetate (0 or 200 mg) in barley-ma
ize-based diets, without supplementary trace elements, on the growth perfor
mance, blood parameters and the digestibility of P, Ca, Mg, Fe, Cu, Zn, fat
and fatty acids. Daily weight gain was highest (p < 0.001) and feed conver
sion ratio lowest (p < 0.01) for pigs fed phytase-supplemented diets. Dieta
ry vitamin E had no effect on growth performance. Plasma alkaline phosphata
se activity was reduced (p < 0.05), plasma P (p < 0.001) and Fe (p < 0.05)
concentrations were increased by dietary phytase. Plasma cc-tocopherol conc
entration was increased (p < 0.001) Ly the addition of vitamin E. The diges
tibility of P, Ca, Mg, Fe, Cu and Zn was improved (p < 0.01) due to phytase
inclusion. The ct tocopherol digestibility was not affected by dietary vit
amin E supplementation. The caecal digestibility of fat, monoenic and polye
nic fatty acids was reduced (p < 0.05) for pigs fed on diets that were supp
lemented with phytase. The combined addition of vitamin E and phytase impro
ved the caecal digestibility of dietary fat, oleic and linoleic acid.