Determining the equivalent phosphorus released by an <i>Escherichia coli</i>-derived phytase in broiler chicks
Bibliographic record
Abstract
Seven-day-old male Ross 308 broiler chicks were used in a 14-d experiment to determine the equivalency value of a new phytase using corn-soybean meal based diets. The experimental diets consisted of positive control (PC) or negative control (NC) diets which were formulated to contain 5.0 or 1.2 g kg -1 non-phytate P, respectively, with a total P of 7.7 or 3.9 g kg -1 , respectively; and respective calcium levels of 10.0 or 7.6 g kg -1 . The test diets were formulated by the addition of monosodium phosphate (MSP; analyzed to contain 224.0 g kg -1 P) to the NC diet to supply 0.5, 1.0, or 1.5 g of P kg -1 diet, and phytase was added to the NC diet at 500 FTU or 1000 FTU kg -1 at the expense of corn starch. Each diet was randomly assigned to eight cages of four birds each. Body weight gain (BWG) showed both linear and quadratic increase (P < 0.05) with increasing level of dietary P or phytase supplementation (450 to 656 or 603 g, respectively). Feed efficiency (g BWG/g feed intake) increased linearly (P < 0.05) with increase in P or phytase supplementation and quadratic effect to increasing level of phytase (P < 0.05) supplementation (0.699 to 0.793 or 0.758 g, respectively). Percent tibia and toe ash increased linearly (P < 0.05) in response to supplemental P from MSP or phytase supplementation (37.7 and 8 to 47.9 and 10.9 or 45.2 and 10, respectively). Total intestinal tract P and N digestibility increased linearly (P < 0.05) with increasing P supplementation and showed increased (linear and quadratic, P < 0.05) response to phytase. The response variables, BWG, toe and tibia ash, feed intake and final body weight were used for P equivalency calculation. By solving the equated linear regression equations for the supplemental inorganic P intake and supplemental phytase intake for each of the response variables, between 0.930 and 1.101 g of P was released by 1000 FTU of phytase. The results of this study showed that this phytase was efficacious in hydrolyzing phytate P for bone mineralization and growth of broiler chicks. Key words: Chicks, equivalency value, monosodium phosphate, phosphorus, phytase
Fetched live from OpenAlex and de-inverted. Abstracts are not stored in this database: the inverted indexes are 8.6 GB of the frame’s 9.3 GB of text, and the host has 13 GB free.
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 | 0.000 | 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 | 0.001 | 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".