High canola meal in sow diets: effects on reproduction, piglet growth, milk composition, serum metabolites, and nutrient digestibility over two reproductive cycles
Notice bibliographique
Résumé
Feed costs and global demand for soybean meal are increasing, reducing profitability in pig industry. Canola meal is the second most used protein source in swine diets, but evidence on its long-term effects across successive sow parities is limited. This study investigated the effects of canola meal inclusion as the main protein source in sow diets on sow and litter performance over two reproductive cycles. Sixty-eight sows from two batches were randomly allotted one of two diets on d 80 of pregnancy. The control diet (CON) consisted of corn, barley and soybean meal, and the treatment diet (CSCM) consisted of corn, barley and canola meal, included at 14.50% for gestating and 24.50% for lactating sows. The BW and backfat thickness of sows were measured on d 1, d 35, d 80, and d 111 of pregnancy, and on d 1 and d 21 post-farrowing. On d 1 and d 19 post-farrowing, piglets were weighed and milk and blood samples from sows were collected to determine milk composition and serum metabolites. Fecal samples from sows were collected on d 110 of gestation and d 19 of lactation to determine apparent total digestibility (ATTD) determination. Data were analyzed using a randomized complete block design with repeated measures. Results showed that sow BW and backfat thickness were unaffected by diet. Sows fed the CSCM diet exhibited lower (P < 0.05) BW gain than CON sows during late gestation in the first cycle but not in the second cycle. Litter performance, including weight and size, was unaffected by dietary treatment, though litter weight at birth was higher (P < 0.05) in the second cycle than in the first cycle. The composition of colostrum and milk was generally unaffected by diet or cycle, except for colostrum fat, which showed a significant interaction (P < 0.05) between diet and cycle. Serum metabolites revealed tendencies (P < 0.10) for increased creatinine and gamma-glutamyl transferase (GGT) with the CSCM diet, while reproductive cycle effects were observed for GGT, cholesterol, calcium, protein, and albumin levels. Apparent total tract digestibility of nutrients was not significantly influenced by diet or reproductive cycle, though the CSCM diet tended to reduce (P = 0.06) the ATTD of CP. In conclusion, sow diets containing 14.50% canola meal during gestation and 24.50% during lactation maintained similar sow reproductive and litter performance comparable with soybean meal-based diets across two reproductive cycles.
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Comment cette classification a été obtenuedéplier
Prédiction distillée sur la base complète
Imitation des enseignantsNi prévalence calibrée, ni vérité terrain. Validation humaine à venir. Apprise à partir de 10 348 étiquettes directes de Codex et de 10 348 étiquettes directes de Gemma. Le mode candidate est l'union des têtes enseignantes seuillées; le consensus est leur intersection. Ces sorties portent le statut machine_predicted_unvalidated et ne sont ni des étiquettes humaines ni des étiquettes directes de modèles de pointe.
Scores Codex et Gemma par catégorie
| 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 | 0,000 | 0,000 |
| Études des sciences et des technologies | 0,000 | 0,000 |
| Communication savante | 0,000 | 0,000 |
| Science ouverte | 0,000 | 0,000 |
| Intégrité de la recherche | 0,000 | 0,000 |
| Charge utile insuffisante (le modèle a refusé de juger) | 0,000 | 0,000 |
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 tête enseignante, 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 ».