Digestibilitat fecal i ileal del greix i els àcids grassos del porc en creixement

Authors

  • Pere Duran
  • Enric Esteve-Garcia

Abstract

The effect of fat source on fat and fatty acid apparent faecal and ileal digestibility was studied in growing pigs. Faecal and ileal digestibilities were measured, using titanium dioxide as inert marker, in intact and ileo-rectally anastomosed pigs, respectively. Five different fat sources, added at 10 % to a barley based diet, were tested: tallow, high oleic sunflower oil, sunflower oil, linseed oil and a fat blend (5.5 % tallow, 3.5 % sunflower oil and 1 % linseed oil of diet). Except for basal diet and tallow, fat apparent faecal digestibility and apparent ileal digestibility were relatively similar among diets and site of measurements and the same was observed when it was obtained from the sum of fatty acids apparent faecal digestibility.However fat and sum of fatty acid apparent ileal digestibility varied according to dietary fatty acid composition and it was inversely related with the saturated fatty acid content, due to the lower apparent ileal digestibility of palmitic acid and stearic acid. Apparent ileal digestibility of linoleic acid in sunflower oil diet and linolenic acid in linseed oil diet were higher than the respective fatty acids of the other diets and no differences were observed for oleic acid. The apparent faecal digestibility of the unsaturated fatty acids was higher than the corresponding apparent ileal digestibility values, despite similar fat apparent ileal and faecal digestibilities. This together with the lower (in some cases negative) apparent faecal digestibility of stearic acid suggests that there is biohydrogenation of unsaturated fatty acids in the hindgut.Measurement at the end of the ileum should give a better estimation of digestibility of fat and fatty acids than at the faecal level.

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Published

2007-11-12

How to Cite

Duran, P., & Esteve-Garcia, E. (2007). Digestibilitat fecal i ileal del greix i els àcids grassos del porc en creixement. TECA: Tecnologia I Ciència Dels Aliments, 21–25. Retrieved from https://revistes.iec.cat/index.php/TECA/article/view/29832.001

Issue

Núm. 11 : setembre 2007

Section

Research

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