Intrinsic grain starch digestibility affects the concentration of faecal markers of colonic fermentation and bodyweight gain without affecting feed intake in pigs
| Autor: | Vishal Ratanpaul, Simon Diffey, Michael J. Gidley, J. L. Black, Dagong Zhang, Barbara A. Williams |
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| Rok vydání: | 2020 |
| Předmět: |
0303 health sciences
biology 030309 nutrition & dietetics Starch digestive oral and skin physiology 0402 animal and dairy science food and beverages 04 agricultural and veterinary sciences Sorghum biology.organism_classification 040201 dairy & animal science Small intestine 03 medical and health sciences chemistry.chemical_compound medicine.anatomical_structure Animal science chemistry medicine Colonic fermentation Animal Science and Zoology Large intestine Fermentation Growth rate Digestion |
| Zdroj: | Animal Feed Science and Technology. 268:114599 |
| ISSN: | 0377-8401 |
| Popis: | The amount of energy available for metabolism from grain-based feeds determines pig growth rate. Available energy is influenced by feed intake (FI) and the relative extent of digestion in the small intestine (SI), compared with fermentation of undigested feed in the large intestine (LI). Milled and steam-flaked sorghum and wheat were used to evaluate the following hypotheses: 1) an increase in grain digestibility increases FI, decreases the extent of large-intestinal fermentation and improves the efficiency of feed use; and 2) faecal short-chain-fatty-acids (SCFA) and pH are indicators of the extent of grain fermentation in the LI. Apparent-amylase-diffusion-coefficients (ADC) were measured in vitro as an indicator of intrinsic starch digestibility. Pigs were fed ad libitum the four grain-based diets. FI, average-daily-weight-gain (ADG), feed-conversion-ratio (FCR, FI:ADG), faecal SCFA-concentration and pH were measured weekly. Linear models were fitted between: 1) ADC and ADG, FCR, SCFA-concentration, and pH; 2) ADG and SCFA-concentration, and pH; and 3) FCR and SCFA-concentration, and pH. Grain digestibility did not affect FI, but sorghum reduced ADG (14−21 day: P |
| Databáze: | OpenAIRE |
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