Inositol hexaphosphate increases mucin loss from the digestive tract of ducks

Abstract

The effects of different forms of inositol hexaphosphate (IP6, phytate) on mucin excretion from the digestive tract of ducks were investigated. Forty-eight ten-wk-old male ducks were grouped by weight into eight blocks of six cages with one bird per cage. On the first day of experimentation, birds received by intubation six dextrose-based diets arranged in a 2 × 3 factorial consisting of phytase (0 or 1000 units) and a form of IP6 (no IP6, free phytic acid or magnesium-potassium phytate). During the 54 h following feeding, excreta were continuously collected and frozen until analysed. The amount of mucin and amino acids, threonine, valine and tyrosine, in excreta increased in ducks fed with either magnesium-potassium phytate or free phytic acid. The increase in mucin excretion was more in birds fed with magnesium-potassium phytate than those fed with free phytic acid. The loss of arginine, isoleucine, leucine, lysine and phenylyalanine in excreta was reduced by the presence of microbial phytase. It is concluded that the form of IP6 fed to ducks affects the extent of mucin excretion and also the extent and nature of endogenous amino acid losses in the excreta. Supplementation with exogenous microbial phytase reduced some of the IP6 feeding-induced endogenous intestinal amino acid losses.

Standardized ileal digestibility of proteins and amino acids in sesame expeller and soya bean meal in weaning piglets

“…The low AID of proline in SE compared to SBM can be explained by NDF and phytic acid concentration in SE, which results in an increased production of mucin in the small intestine (Piel et al., ; Onyango and Adeola, ). Mucin is rich in proline and is poorly digested in the small intestine representing an important proportion of the endogenous protein (Montagne et al., ), reducing AID of proline in SE.…”

Differential growth performance and intestinal immune gene expression in diverse genetic lines of growing chickens fed a high concentration of supplemental phytase

“…Sialic acid is a component of some mucins and has been utilized as an indirect measurement of overall mucin production. Dietary phytate has been shown to increase mucin secretion in broiler and duck intestines (Onyango et al 2009;Onyango & Adeola 2012). Pirgozliev et al (2007) reported that 2500 FTU/kg phytase influences endogenous loss including SA from the GIT.…”