Free‐range system and supplementation of 25‐hydroxicholecalciferol increases the performance and serum vitamin levels in mixed‐parity sows
Bibliographic record
Abstract
Abstract Improvements in sow productivity have raised questions regarding dietary vitamin D recommendations. The present study aimed to evaluate the effects of the housing system with access to sunlight exposure and supplementation of 25‐hydroxicholecalciferol on performance and serum levels of 25(OH)D 3 in sows during gestation and lactation. Sows were distributed in an experimental design with two housing systems: gestation crates or gestation free‐range system with external area for sunlight exposure; and two diets: 0 or 50 μg of 25‐hydroxicholecalciferol kg −1 . The use of 25‐hydroxicholecalciferol tended ( P = 0.052) to improve total born and influenced ( P = 0.046) on number of born alive. Litter weight at birth was also increased ( P = 0.01) by 25‐hydroxicholecalciferol supplementation; 25‐hydroxicholecalciferol supplementation and housing system (free‐range with sunlight exposure) tended to increase weaning weight ( P = 0.07) and litter daily gain ( P = 0.051) during lactation. Exposure to sunlight and 25‐hydroxicholecalciferol supplementation increased 25(OH)D 3 serum levels when compared with control treatment during gestation (136.95 vs. 113.92 ng mL −1 ; P = 0.035) and lactation (120.29 vs. 88.93 ng mL −1 ; P = 0.026). In conclusion, the association of 25‐hydroxicholecalciferol supplementation with exposure to sunlight during gestation improved significantly 25(OH)D 3 serum levels and consequently performance traits in gestation and lactation.
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How this classification was reachedexpand
Full frame distilled prediction
Teacher imitationNot calibrated prevalence, not ground truth. Human validation pending. Learned from the 10,348 direct Codex labels and 10,348 direct Gemma labels. Candidate is the union of thresholded teacher heads; consensus is their intersection. These outputs are machine_predicted_unvalidated and are not human labels or direct frontier model labels.
Codex and Gemma teacher scores by category
| Category | Codex | Gemma |
|---|---|---|
| Metaresearch | 0.002 | 0.000 |
| Meta-epidemiology (narrow) | 0.000 | 0.000 |
| Meta-epidemiology (broad) | 0.000 | 0.000 |
| Bibliometrics | 0.000 | 0.001 |
| Science and technology studies | 0.000 | 0.001 |
| Scholarly communication | 0.000 | 0.000 |
| Open science | 0.000 | 0.000 |
| Research integrity | 0.000 | 0.000 |
| Insufficient payload (model declined to judge) | 0.000 | 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 teacher head, 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".