149 KemTRACE® Chromium improves pig performance and meat quality
Notice bibliographique
Résumé
Abstract The objective was to evaluate the impact of KemTRACE® Chromium (KTCr) as a source of chromium propionate on pig performance and meat quality, as well as to calculate a return on investment (ROI) when used during the entire grow-to-market period. The hypothesis was that the dietary inclusion of KTCr during the entire grow-finish phase is a profitable tool to improve pig performance and meat quality regardless of the season. The experiment was conducted at a research barn with pigs coming from a commercial flow in central Canada. Two dietary net energy (NE) levels were used to represent summer (standard NE) vs winter (low NE) diets. The experiment had a Completely Randomized Design with 4 dietary treatments in a 2 (NE standard vs low (-75 kcal NE/kg)) × 2 (KTCr 0 vs 200 ppb) factorial arrangement. The experimental unit was a pen with a feeder and 22 pigs. Each treatment had 12 pen replicates. Pigs were the offspring of Fast female 276 × PIC board 800 Duroc; pigs had ~77 days of age and 29.4±0.36 kg BW at the beginning. All pigs were chemically castrated (Improvest® by Zoetis). Pigs were sent to the slaughterhouse on 2 dates at weeks 12 and 15, for a total of 99 days average in experiment. Pig performance and meat quality parameters were evaluated. Calculation of ROI used the USDA National Daily Hog and Pork Report Summary of March 26, 2024. Statistical analyses (JMP® 17) included main effects of NE level and KTCr inclusion, as well as their interaction. Residuals were used to identify outliers; data that deviated more than 2.5 from the predicted mean were excluded (< 1%). Dietary inclusion of KTCr and NE level did not interact on pig performance. Pigs fed KTCr diets tended (P=0.138) to grow 1% faster than pigs fed diets without KTCr regardless of NE level, and that effect was mostly driven by pigs fed the NE Standard diet (ADG was 1.6% larger with KTCr at 200 vs 0 ppb). The ADFI and F:G ratio did not differ among treatments. In pigs fed NE Standard diets, KTCr yielded carcasses 0.77% heavier (P=0.067). The most relevant benefits of KTCr on meat quality were a reduction (P=0.079) of drip losses and improved (P=0.086) marbling regardless of NE level in diets. The effects of NE level were consistent with expectations. The ROI analysis showed a value of 3.1 based on BW gain, and a value of 4.86 based on carcass weight, when KTCr was included in NE Standard diets. In conclusion, dietary use of KTCr in grow-finish is a profitable tool to improve pig performance and meat quality.
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Comment cette classification a été obtenuedéplier
Prédiction machine sur la base complète
Imitation des enseignantsNi prévalence calibrée, ni vérité terrain. Validation humaine à venir. Le volet Gemma est une étiquette directe du modèle pour chaque travail de la base, lue sur la notice réduite au titre. Le volet Codex est un classifieur appris des 10 348 étiquettes directes de Codex et calibré sur les taux pondérés de l'échantillon; les champs sans appui suffisant ne portent aucun appel Codex. Le mode candidate est l'union des deux volets; le consensus est leur intersection. Ces sorties portent le statut machine_predicted_unvalidated et ne sont pas des étiquettes humaines.
Scores du classifieur distillé par catégorie (deux têtes)
| Catégorie | Codex | Gemma |
|---|---|---|
| Métarecherche | 0,000 | 0,000 |
| Méta-épidémiologie (sens strict) | 0,000 | 0,000 |
| Méta-épidémiologie (sens large) | 0,001 | 0,000 |
| Bibliométrie | 0,001 | 0,000 |
| Études des sciences et des technologies | 0,000 | 0,000 |
| Communication savante | 0,001 | 0,000 |
| Science ouverte | 0,001 | 0,000 |
| Intégrité de la recherche | 0,001 | 0,000 |
| Charge utile insuffisante (le modèle a refusé de juger) | 0,004 | 0,001 |
Scores machine (provisoires)
Les deux têtes enseignantes du modèle étudiant, lues sur ce travail. Un score ordonne la base pour la relecture; il n'affirme jamais une catégorie, et le statut de validation accompagne chaque rangée tel quel.
Scores de référence d'un modèle non mature (critères de maturité non atteints, 7 itérations). Un score ordonne; il n'affirme jamais une catégorie.
score_only:v0-immature-baseline · tel quel depuis la passe de notation : score_only signifie que le nombre peut ordonner les travaux, et qu'aucune étiquette de catégorie n'en découleClassification
machine, non validéePrédiction automatique; un appel candidat d’une seule source (Gemma direct ou Codex distillé), pas un consensus.
Le détail, modèle par modèle et score par score, se trouve en fin de page sous « Comment cette classification a été obtenue ».