Wickramasuriya, Samiru S

Kim, Eunjoo

Cho, Hyun-Min

Shin, Taeg-Kyun.

Kim, Beomgyu

Lee, Mingyung

Seo, Seongwon

Heo, Jung-Min

Choi, Hojun

2019

<p>In this study, we investigated the effect of methionine isomers (D- and L-methionine) on growth performance, blood metabolite levels, nutrient digestibility, intestinal morphology, and foot pad dermatitis in broilers challenged with acute heat stress. In total, 240 broilers were randomly allocated in a 2×2 factorial arrangement consisting of two dietary treatments (D- vs. L-methionine) and two thermal environmental conditions (thermo-neutral vs. acute heat stress). Methionine isomers were added to the diet as an ingredient according to the diet formulation. The broilers were exposed to acute heat stress at 33℃ for 5 h on day 14. The average daily gain and feed conversion ratio of birds fed L-methionine were higher than those fed D-methionine (P＜0.05) from the time of hatching till 21 days. Induced acute heat stress impaired (<i>P</i>＜0.05) the daily gain and feed intake of the broilers on day 21. Furthermore, the blood urea nitrogen levels of birds subjected to acute heat stress on days 14 and 21 were higher (<i>P</i>＜0.05) than those of their counterparts. Longer villi (<i>P</i>＜0.05) were observed in broilers fed L-methionine-supplemented diet than in those fed D-methionine-supplemented diet on day 14, irrespective of thermal environmental conditions. Heat stress reduced (<i>P</i> ＜0.01) nutrient digestibility of the broilers on days 14 and 21. Higher incidence and severity of foot pad dermatitis were observed (<i>P</i>＜0.05) in broilers fed diet containing D-methionine than in those fed L-methionine-supplemented diet. In conclusion, L-methionine-supplemented diet improved growth performance, overcame growth depression, and reduced the incidence of foot pad dermatitis when broilers were exposed to acute heat stress in the starter period.</p>

Journal of Poultry Science, 56(3), p. 195-203

1349-0486

1346-7395

https://hdl.handle.net/1959.11/58368

Nihon Kakin Gakkai,Japan Poultry Science Association

Attribution-NonCommercial-ShareAlike 4.0 International

Differential effects of dietary methionine isomers on broilers challenged with acute heat stress

Journal Article

Publication