Dietary calcium concentration does not affect endogenous phosphorus loss in broiler chickens fed purified diets during a 3-day experimental period
Bibliographic record
Abstract
A study was conducted to evaluate the impact of increasing levels of dietary calcium in phosphorus-free diets on the determination of basal endogenous loss (BEL) of P in broiler chickens. Male Cobb 500 broilers were fed a corn–soybean meal diet that met their requirements until day 19 post hatching, when they were allotted to three dietary treatments (8 replicates each with 10 birds/replicate) consisting of purified P-free diets with 0, 4, or 8 g/kg of calcium in a randomized complete block design using body weight as blocking factor. Data were analyzed in a two-way ANOVA. The diets were fed for 3 days, and excreta and ileal digesta samples were taken at the end of the trial. Calcium concentration in the excreta and terminal ileum linearly increased ( P < 0.001) as dietary calcium increased. The BEL of P were 205, 230, and 236 mg/kg dry matter intake (DMI) in the diets containing 0, 4, and 8 g/kg calcium ( P = 0.400), respectively. Additionally, the BEL of calcium was determined to be 99 mg/kg DMI using the calcium and P-free diet. In conclusion, increasing dietary calcium from 0 to 8 g/kg in P-free diets did not affect the BELs of phosphorus.
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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 | 0.001 |
| Scholarly communication | 0.001 | 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".