83 The impact of xylanase on arabinoxylan hydrolysis when included in corn or wheat based diets fed to swine
Bibliographic record
Abstract
Abstract Carbohydrases added to swine diets hydrolyze non-starch polysaccharides (NSP) to smaller oligosaccharides, decreasing their degree of polymerization (DP). Wheat contains more NSP in the form of arabinoxylans (AX), however corn AX have higher arabinose:xylose. This experiment determined the potential for a differential response to the carbohydrase, xylanase, when added to corn or wheat based diets for swine. Twelve ileal cannulated barrows (BW 37±2.1kg) were used in a modified crossover design with a 2x2 factorial arrangement of treatments in two periods (n = 6). Grain (81.5% corn or 90.5% wheat) and xylanase (±0.01%, 16,000 XU/kg feed) were main effects. The crossover occurred only between xylanase; pigs remained on the same grain throughout and pig was randomized within sequence. Isoenergetic/isonitrogenous (3,500 Kcal ME/kg, 0.87% SID Lys) diets were fed at 3x maintenance for 18d; fecal and digesta samples were collected on d15-16 and d17-18, respectively. Ileal energy digestibility tended to improve with xylanase (71.3–73.8%; P < 0.10). Fecal energy digestibility was improved by xylanase in wheat, but not corn, based diets (grain*xylanase, P < 0.05). Ileal butyric acid was highest when pigs received the wheat diet without xylanase (grain*xylanase, P < 0.05). Xylanase had no effect on fecal short chain fatty acids (P > 0.10). Pigs fed wheat diets had increased percent fecal propionic and lower butyric and valeric acid than those fed corn diets (P < 0.05). Ileal arabinose:xylose ratio was reduced with xylanase in corn, but not wheat diets, while the opposite was observed in fecal samples (grain*xylanase, P < 0.05). Ileal samples from pigs receiving corn without xylanase had the highest AX-DP (grain*xylanase, P < 0.05). Fecal AX-DP was reduced with xylanase inclusion (P < 0.05) and was lower in wheat, than corn based diets (P < 0.05). Xylanase decreased AX-DP throughout the gastrointestinal tract and tended to improved ileal energy digestibility in corn and wheat based diets.
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How this classification was reachedexpand
Full frame machine prediction
Teacher imitationNot calibrated prevalence, not ground truth. Human validation pending. The Gemma side is a direct model label for every work in the frame, read from the title-only record. The Codex side is a classifier learned from the 10,348 direct Codex labels and calibrated to design-weighted sample rates; fields without enough sample support carry no Codex call. Candidate is the union of the two sides; consensus is their intersection. These outputs are machine_predicted_unvalidated and are not human labels.
Distilled classifier scores by category (both heads)
| Category | Codex | Gemma |
|---|---|---|
| Metaresearch | 0.000 | 0.000 |
| Meta-epidemiology (narrow) | 0.000 | 0.000 |
| Meta-epidemiology (broad) | 0.000 | 0.000 |
| Bibliometrics | 0.000 | 0.000 |
| Science and technology studies | 0.000 | 0.000 |
| Scholarly communication | 0.000 | 0.000 |
| Open science | 0.000 | 0.000 |
| Research integrity | 0.000 | 0.001 |
| Insufficient payload (model declined to judge) | 0.001 | 0.000 |
Machine scores (provisional)
The two teacher heads of the student model, read on this work. A score orders the frame for review; it never asserts a category, and the validation status ships verbatim with every row.
Baseline scores from an immature model (maturity gate not passed, 7 training rounds). Scores rank; they never assert a category.
score_only:v0-immature-baseline · verbatim from the scoring run: score_only means the number may rank works, and no category label ships from itClassification
machine, unvalidatedMachine predicted; a candidate call from one source (direct Gemma or distilled Codex), not a consensus.
How this classification was reached, model by model and score by score, is at the end of the page under "How this classification was reached".