The influence of supplemental alpha-galactosidase and phytase in a vegetable ration for dogs on the digestibility of organic components and phytate phosphorus
B. De Smet et al., The influence of supplemental alpha-galactosidase and phytase in a vegetable ration for dogs on the digestibility of organic components and phytate phosphorus, J ANIM PHYS, 81(1), 1999, pp. 1-8
Citations number
17
Categorie Soggetti
Veterinary Medicine/Animal Health
Journal title
JOURNAL OF ANIMAL PHYSIOLOGY AND ANIMAL NUTRITION-ZEITSCHRIFT FUR TIERPHYSIOLOGIE TIERERNAHRUNG UND FUTTERMITTELKUNDE
The dry feeds contain a higher amount of vegetable ingredients and conseque
ntly more alpha-galactosides, which are known to cause flatulence in dogs,
and more phytates. Because mammals do nor produce endogenous phytase, the p
hosphorus source in the phytate molecule is not available. In addition, phy
tates can form complexes with several divalent cations. In this experiment
alpha-galactosidase (AG), phytase (PT) or both were added to a nearly compl
ete vegetable ration. The digestibility coefficients were determined by usi
ng the total collection of faeces method. The AG significantly increased th
e digestibility coefficients of dry matter, organic matter, crude protein,
and N-free extract. As expected, the PT significantly increased the digesti
bility coefficient of phosphorus. Fresh faecal samples were taken to determ
ine the content of dry matter, pH, organic acids, biogenic amines and inosi
tol phosphates (IP). The AG significantly reduced the content of propionic
and lactic acid. The PT induced a significant reduction of the hexa-inosito
l-phosphates without any influence on the content of the lower inositol pho
sphates.