Effect of Phase Feeding, Space Allowance and Mixing on Productive Performance of Grower-Finisher Pigs
Camp Montoro, Jordi (Universitat Autònoma de Barcelona. Servei de Nutrició i Benestar Animal)
Pessoa, Joana (M3-BIORES-Measure)
Solà Oriol, David (Universitat Autònoma de Barcelona. Departament de Ciència Animal i dels Aliments)
Muns, Ramon (Agri-Food and Biosciences Institute)
Gasa, Josep (Universitat Autònoma de Barcelona. Departament de Ciència Animal i dels Aliments)
Manzanilla, Edgar Garcia (University College Dublin. School of Veterinary Medicine)

Fecha:	2022
Resumen:	Low space allowance and mixing may affect productive performance in pigs, but it is not clear whether space allowance and mixing interact with each other during the grower-finisher period. In addition, phase feeding is a good strategy used to reduce feed costs and improve feed efficiency, but it may result in nutrient limitations in suboptimal production conditions, e. g. , high stress. This study investigated the effect of space allowance, mixing and phase feeding on productive performance of grower-finisher pigs. Three trials were conducted. Space allowance did not affect productive performance in any of the trials. Non-mixed pigs were 5. 40 and 5. 25 kg heavier than mixed pigs at 21 weeks of age in trial 1 and trial 2. Introducing a second diet with lower lysine/energy ratio from 0. 95 to 0. 82 g/MJ at 15-16 weeks of age reduced productive performance of pigs by 3. 45 and 4. 05 kg at 21 weeks of age in trial 1 and trial 2, but not in trial 3 where all pigs were mixed. In conclusion, mixing and reducing lysine/energy ratio from 0. 95 to 0. 82 g/MJ at 15-16 weeks of age, had a more marked impact on productive performance than a reduction in space allowance from 0. 96 to 0. 78 m 2 /pig. This study investigates the effects of space allowance (SA), mixing and phase feeding (PF) on performance of grower-finisher pigs. Three trials (T) were conducted. In T1 and T2, 345 pigs/trial were moved to finisher stage at 11 weeks of age and assigned to two SAs: 0. 96 (n = 15 pens; 10 pigs/pen) and 0. 78 (n = 15; 13 pigs/pen) m 2 /pig. Mixing was applied to 5 pens of each SA leading to a 2 × 2 factorial arrangement (SA × Mixing). For PF, 2 diets with 0. 95 and 0. 82 g SID Lys/MJ NE were applied to 5 pens of each SA (not mixed) leading to another 2 × 2 factorial arrangement (SA × PF). In T3, 230 pigs were moved to the grower-finisher stage at 11 weeks of age, mixed, and assigned to 4 treatments (SA × PF; n = 5 pens). Data were analyzed using general linear mixed models. SA did not affect performance (p > 0. 05). Non-mixed pigs were 5. 40 (T1) and 5. 25 (T2) kg heavier than mixed pigs at 21 weeks of age (p < 0. 001). PF reduced performance of pigs by 3. 45 (T1) and 4. 05 (T2) kg at 21 weeks of age (p < 0. 001). In conclusion, mixing and reducing SID Lys:NE ratio from 0. 95 to 0. 82 g/MJ at 15-16 weeks of age, have a more marked impact on performance than reducing SA from 0. 96 to 0. 78 m 2 /pig.
Derechos:	Aquest document està subjecte a una llicència d'ús Creative Commons. Es permet la reproducció total o parcial, la distribució, la comunicació pública de l'obra i la creació d'obres derivades, fins i tot amb finalitats comercials, sempre i quan es reconegui l'autoria de l'obra original.
Lengua:	Anglès
Documento:	Article ; recerca ; Versió publicada
Materia:	Group size ; Growth ; Lysine ; Pig ; Regrouping ; Swine
Publicado en:	Animals, Vol. 12 (2022) article 390, p. 1-14, ISSN 2076-2615

DOI: 10.3390/ani12030390
PMID: 35158712

14 p, 1.2 MB

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