87 Xylanase effects on growth performance, nutrient digestibility, organ weight, and short chain fatty acid concentration in colon digesta of weaned pigs fed wheat and canola meal-based diets
Bibliographic record
Abstract
Abstract This study was to determine the effect of dietary supplementation of xylanase on growth performance, nutrient digestibility, organ weight, digesta pH and concentration of short-chain fatty acids (SCFA) of weaned pigs fed wheat-canola meal-based diets over a 35-d period. A total of 144 piglets (6.2 ± 0.7 kg) received one of 8 diets based on a randomized complete block design. Body weight and feed intake were recorded weekly to calculate average daily gain (ADG), average daily feed intake (ADFI), and feed efficiency(G:F). Treatments consisted of a control wheat-SBM-based diet and wheat-regular (RCM), dehulled (DCM) or coarse (CCM) canola meal. All diets contained 500 phytase units (FTUs/kg; Quantum Blue-5G), and titanium-dioxide (0.3%), and were fed without and with 16,000 Birch-Xylan Units of xylanase (BXU/kg; Econase-XT). Apparent total tract digestibilities (ATTD) of NDF, CP, P, Ca, DM, and diet were determined. On d 35, one pig per pen was euthanized to evaluate the effect of treatment on organ weight, digesta pH, and digesta concentration of SCFA. Treatment did not affect growth performance. Xylanase supplementation improved nutrient digestibilities, without affecting growth performance. The ATTD of NDF was greater (P < 0.05; 48%) in the wheat-SBM+xylanase, wheat-SBM without xylanase (46%), and DCM+xylanase (45%) diets. The ATTD of CP was greater (P < 0.05; 78%) in wheat-SBM+xylanase, and wheat-DCM+xylanase (75%), diets. Xylanase supplementation increased ATTD of P and Ca by 9 and 19%; whereas ileum and colon digesta pH increased by 6 and 3%. Supplementing xylanase to DCM increased butyric acid by 10%, whereas the concentration of acetic acid increased by 24% in colon-digesta of pigs fed CCM+xylanase. In conclusion, dietary supplementation of xylanase increased nutrient digestibilities, digesta pH without affecting growth performance of weaned pigs fed wheat and canola meal-based diets. Additionally, supplemental xylanase increased butyric acid concentration in colon digesta of pigs fed wheat-DCM 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) | 0.001 | 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".