Increased dietary protein or free amino acids supply for heat stress pigs: effect on performance and carcass traits

Journal of Animal Science
A MoralesM Cervantes

Abstract

Heat stress (HS) pigs reduce their voluntary feed intake (VFI) and ingestion of indispensable amino acids (AA). Increasing the dietary crude protein (CP) content may help to correct the reduced AA intake by HS pigs, but it may further increase their body heat load. Increasing the AA intake by adding free AA to the diet does not affect the heat load of HS pigs. Two 21-d experiments were conducted. In Exp. 1, 30 pigs (31.1 ± 1.2 kg initial body weight) were used to determine the performance depression because of HS. Treatments were: thermo neutral pigs fed a 22% CP control diet (TN-C); HS pigs fed the control diet (HS-C); HS pigs fed a 14% CP, AA supplemented diet (HS-AA). HS pigs had lower ADG and Lys utilization efficiency, and consumed 20 and 25% less Lys and Thr, respectively, than the TN-C pigs (P < 0.05). In Exp. 2 (comparative slaughter), 25 pigs (33.6 ± 0.65 kg initial body weight) were used to evaluate the effect of extra dietary AA either as protein-bound or free AA on the performance and carcass traits of HS pigs. Treatments were: control wheat-SBM-free Lys, Thr and Met diet (CON); diet with 30% more CP than CON (HSxP); diet added with free AA to contain at least 25% more of each AA than the recommended level (HSxAA). ...Continue Reading

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Jan 27, 2016·Journal of Animal Science·A MoralesM Cervantes
Oct 19, 2017·Journal of Thermal Biology·Miguel CervantesAdriana Morales

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Citations

Jul 27, 2020·Translational Animal Science·Adriana MoralesMiguel Cervantes
Jul 27, 2020·Translational Animal Science·Amanda J CrossGary A Rohrer
Aug 24, 2018·Journal of Animal Science·Luan Sousa Dos SantosLuciano Hauschild
Aug 24, 2021·Journal of Thermal Biology·Alípio Dos Reis TeixeiraPaulo Henrique Reis Furtado Campos

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