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Publication type: Journal Article
Document type: Full Paper

Year: 2009

Author(s): Metzler, BU; Mosenthin, R; Baumgärtel, T; Rodehutscord, M

Title: Effects of fermentable carbohydrates and low dietary phosphorus supply on the chemical composition of faecal bacteria and microbial metabolites in the gastrointestinal tract of pigs.

Source: J Anim Physiol Anim Nutr (Berl). 2009; 93(1):130-139



Authors Vetmeduni Vienna:

Metzler-Zebeli Barbara


Abstract:
The objective was to determine the effects of fermentable carbohydrates on phosphorus (P) metabolism, the chemical composition of the faecal mixed bacterial mass (MBM) and the microbial activity in the large intestine (LI) of pigs. Eight barrows (mean BW 35.9 +/- 0.9 kg), fitted with simple T-cannulas at the terminal ileum, were either fed a low-P corn-soybean meal-based control diet or 75% of the control diet supplemented with 25% cellulose, starch or pectin according to a 4 x 3 Latin Square design. Both pectin and cellulose caused higher faecal than ileal P recoveries. Ileal volatile fatty acids (VFA) levels were more pronounced for the starch (p < 0.05) rather than the cellulose and pectin treatments, whereas pectin resulted in a higher faecal VFA concentration in comparison to starch and cellulose (p < 0.05). The differences in faecal VFA concentrations corresponded to the pH values obtained in faeces. The N content of MBM was higher (p < 0.05) when cellulose was supplemented. Pectin caused a decrease in the P content of the MBM compared to the control (p < 0.05). As a result, the N:P ratio was significantly higher for the pectin (N:P = 4.33) than for the control treatment (N:P = 2.63), while the Ca:P ratio remained constant for all treatments, suggesting changes in the accumulation of N, P and Ca in MBM, probably due to changes in the species composition and activity of the microflora.

Keywords Pubmed: Animal Feed
Animal Nutritional Physiological Phenomena
Animals
Calcium/metabolism
Cellulose/administration & dosage
Cellulose/metabolism
Dietary Carbohydrates/administration & dosage
Dietary Carbohydrates/metabolism
Dietary Fiber/administration & dosage*
Dietary Fiber/metabolism
Dose-Response Relationship, Drug
Fatty Acids, Volatile/analysis
Fatty Acids, Volatile/metabolism
Feces*/chemistry
Feces*/microbiology
Fermentation
Gastrointestinal Tract/metabolism*
Gastrointestinal Tract/microbiology
Hydrogen-Ion Concentration
Ileum/metabolism
Male
Nitrogen/metabolism
Pectins/administration & dosage
Pectins/metabolism
Phosphorus, Dietary/administration & dosage*
Phosphorus, Dietary/metabolism
Random Allocation
Starch/administration & dosage
Starch/metabolism
Swine/metabolism*


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