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Effect of Essential Amino Acid Fortification on Growth Performance of Finishing Pigs at a High Ambient Temperature

YAMAZAKI, Makoto ; INOUE, Hiroaki ; MATSUMOTO, Mitsuhito ; TAKADA, Ryozo

Nihon Yoton Gakkaishi, 2019/09/30, Vol.56(3), pp.97-105

The Japanese Society of Swine Science

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  • Título:
    Effect of Essential Amino Acid Fortification on Growth Performance of Finishing Pigs at a High Ambient Temperature
  • Autor: YAMAZAKI, Makoto ; INOUE, Hiroaki ; MATSUMOTO, Mitsuhito ; TAKADA, Ryozo
  • Assuntos: essential amino acid ; finishing pigs ; heat stress ; plasma free amino acid
  • É parte de: Nihon Yoton Gakkaishi, 2019/09/30, Vol.56(3), pp.97-105
  • Descrição: Two experiments were conducted to evaluate the effects of dietary essential amino acid fortification on the growth performance of finishing pigs at a high ambient temperature. In Experiment 1, finishing pigs were randomly allotted to two dietary regimens (100% vs 200% of lysine requirement) and fed in a different ambient temperature (AT:22°C vs 32°C) for 4 weeks. In Experiment 2, finishing pigs were randomly allotted to 4 treatments, and fed 100% of lysine requirement diet (32°C-L100), 200% of lysine requirement diet (32°C-L200) and 200% of lysine requirement diet supplemented with threonine and methionine to meet the ideal pattern of essential amino acid (32°C-LTM) in 32°C AT, and 100% of lysine requirement diet in 22°C AT (22°C-L100). In both experiments, free amino acid concentrations of plasma were determined at weeks 0 (the day before heat exposure), 2, and 4 (the day before the end of the experiment). In Experiment 1, average daily feed intake were tend to decrease in pigs reared 32°C AT, there is no significant effect of AT on average daily gain and feed efficiency. Plasma free lysine concentration were increased in pigs fed 200% lysine diet. Significant lower concentration of plasma free lysine, threonine and methionine were observed in pigs reared in 32°C AT. In Experiment 2, daily body weight gain of 32°C-L200 treatment group was lower than 22°C-L100 treatment group. Treatment did not have any effect on average daily feed intake and feed efficiency. Plasma free lysine concentration were significantly higher in 32°C-L200 and 32°C-LTM treatment groups, and threonine and methionine concentration was higher in 32°C-LTM treatment group. These results indicate that supplementation of lysine, or mixture of lysine, threonine and methionine does not alleviate the negative effect of constant heat stress of finishing pigs.
  • Editor: The Japanese Society of Swine Science
  • Idioma: Japonês;Inglês
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  • Realização: ABCD-USP USP   Logos de Redes Sociais: Freepik

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