PSVII-34 Digestibility and growth performance of growing pigs, fed corn or wheat diets supplemented with xylanase
Bibliographic record
Abstract
Abstract Corn and wheat contribute variable amounts of arabinoxylans (AX) to swine rations. Xylanase hydrolyzes AX into smaller oligosaccharides, potentially improving nutrient digestibility or fermentation. This experiment was designed to determine the response of growing pigs to exogenous xylanase supplementation in either a corn or wheat based diet. Two hundred pigs (7.99±2.8kg), 5 pigs/pen, 40 pens in 2 blocks (n = 10) were assigned to one of four treatments for 140±7d. Treatments, arranged in a 2x2 factorial, included grain (corn/wheat based) and xylanase (±0.01%,16 000 BXU/kg) as main effects. Pigs were on a five-phase feeding program; diets were isonitrogenous and isoenergetic within each phase. Growth and feed intake were determined weekly. Fecal samples were collected in phases two, four, and five. Growth, feed intake and feed efficiency were unaffected by xylanase (P > 0.10). Except for phase one, pigs receiving corn had improved (P < 0.05) ADG and ADFI relative to wheat; while G:F was improved only in the second phase (P < 0.05). Gross energy digestibility was higher in corn (88.2%) than wheat (87.2%) diets in the nursery phase (P < 0.05). In the finisher phase, xylanase improved energy digestibility of wheat diets (grain*xylanase, P < 0.05). During the nursery phase, percent fecal acetic acid was decreased with xylanase in corn; but increased in wheat diets (grain*xylanase, P < 0.05). Conversely, fecal isobutyric, butyric and isovaleric acid were decreased with xylanase in wheat diets only (grain*xylanase, P < 0.05). In the grower phase, fecal acetic acid was higher (P < 0.05) in wheat than corn diets, while isovaleric, valeric and caproic acid were reduced (P < 0.05). In the finisher phase, fecal propionic acid was lower in wheat diets (P < 0.05). During the finisher phase of growth, xylanase improved energy digestibility of pigs receiving wheat based diets, however this effect was not observed when pigs received corn 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) | 0.001 | 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 | 0.001 | 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".