Fibre components negatively affect ileal protein digestibility in pigs

Self Cite

The effects of supplementing cereal-based diets with 0, 40, or 80 g of pectin (P) or 270 g of rye (R) per kg on ileal digestibility of protein and amino acids (AA), and digesta viscosity in pigs of 20 kg body weight (BW), and on growth performance, nitrogen balance, small intestinal morphology, and threonine metabolism parameters in pigs of 15 kg BW were assessed. Digesta viscosity was increased more by 80 g than by 40 g P or by R. Ileal digestibility of AA and nitrogen retention were negatively affected by P, whereas growth performance was decreased by R. The effect of the supplements on intestinal morphology was variable, except for the increase in myenteron thickness by P and crypt depth by R. The number of goblet cells containing acidic mucins was decreased by 40 g P in crypts in the mid-jejunum and by 40 g P and R in villi in the ileum. Fasting and postprandial plasma levels of free threonine and of threonine dehydrogenase activity in the liver and pancreas were not affected. In conclusion, feeding P or R negatively affects ileal AA digestibility and provokes irregular changes of small intestinal morphology. These effects cannot be attributed to the increase of digesta viscosity as the main factor.

Section: Discussionsupporting

confidence: 91%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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The effects of pectin and rye on amino acid ileal digestibility, threonine metabolism, nitrogen retention, and morphology of the small intestine in young pigs

Święch¹,

Tuśnio²,

Taciak³

et al. 2012

Self Cite

“…The effect of fibre added to the diet, as was the case in our study, depends on its physicochemical properties such as water-solubility, water-binding and viscosity which influence viscosity, dry matter content and transit time of digesta (Buraczewska, 2001). Cellulose is a water-insoluble fibre which does not affect ileal digestibility of protein and amino acids even when added up to the 13% level (Li et al, 1994) while inclusion of the soluble fibre (pectin) generally increases viscosity of digesta and decreases ileal digestibility (Mosenthin et al, 1993).…”

Section: Concentration Of Protein and Lipid Metabolites In Blood (Expmentioning

confidence: 64%

Response of young pigs to feeding potato protein and potato fibre - nutritional, physiological and biochemical parameters

Tuśnio¹,

Pastuszewska²,

Święch³

et al. 2011

Two experiments were performed on growing pigs to determine the effects of potato protein and potato fibre on growth performance, apparent ileal and total tract digestibility, digesta transit time, blood biochemical parameters and small intestinal morphology. Apparent ileal digestibility (AID) of potato protein concentrate and most essential amino acids was significantly lower than that of casein. The substitution of potato fibre for cellulose did not affect significantly AID. Potato fibre tended to reduce the utilization of protein ingested. Passage rate of digesta was affected mostly by the type of fibre. Dietary protein and fibre did not influence the relative weight of stomach and jejunum whereas their effects on other segments were variable. Morphological parameters were affected either by protein and by fibre but course and magnitude of these effects were inconsistent and differed among the segments. In most cases interactive effects of both factors were found. Potato fibre did not reveal beneficial health effects on lipid metabolism.

“…Slower average growth rate of the F 2 pigs resulted from the lowest protein digestibility of GM 20 diet caused by fibre components (Buraczewska, 2001) as well as lower metabolizable energy content (Skiba et al, 2005). In consequence these pigs consumed significantly lower amount of digestible protein and energy as compared with the control animals.…”

Section: Discussionmentioning

confidence: 98%

Growth of the gastrointestinal tract in weaning pigs as affected by crude fibre content in the diet

Skiba¹,

Raj²,

Weremko³

et al. 2005