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. 2019 Jun;39(3):388-401.
doi: 10.5851/kosfa.2019.e32. Epub 2019 Jun 30.

Effect of Total Digestible Nutrients Level of Concentrates on Growth Performance, Carcass Characteristics, and Meat Composition of Korean Hanwoo Steers

Jun Sang Ahn  1 , Gi Hwal Son  2 , Min Ji Kim  2 , Chang Six Choi  3 , Chang Woo Lee  3 , Joong Kook Park  4 , Eung Gi Kwon  1 , Jong Suh Shin  2 , Byung Ki Park  4
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Effect of Total Digestible Nutrients Level of Concentrates on Growth Performance, Carcass Characteristics, and Meat Composition of Korean Hanwoo Steers

Jun Sang Ahn et al. Food Sci Anim Resour. 2019 Jun.

Abstract

This study was conducted to investigate the effect of the total digestible nutrients (TDN) level of commercial concentrates on growth performance, carcass characteristics, and meat composition of late fattening Hanwoo steers. A total of 28 steers were randomly assigned to one of four dietary groups; T1 (73.30% TDN), T2 (74.50% TDN), T3 (76.40% TDN), and T4 (77.10% TDN). Average daily gain (ADG) was slightly but not significantly higher in the T2 than in the other treatments. Dry matter intake (DMI) and feed conversion ratio (FCR) were higher in the T2 than in the other treatments; however, the differences were not statistically significant. Carcass back fat thickness was thicker in the T4 and marbling score was higher in the T2 than in the other treatments; however, the differences were not statistically significant. The TDN level of concentrates had no effect on the physicochemical characteristics and fatty acid composition of the longissimus muscle. The finding of this study indicate that less than 74% or greater than 75% TDN in the commercial concentrate did not contribute to improve ADG, FCR, marbling score; therefore, in the present study, the recommendable TDN level in the commercial concentrate for late fattening period was 74% to 75% in terms of growth performance and marbling score of Hanwoo steer.

Keywords: Hanwoo steers; carcass characteristics; growth performance; meat composition; total digestible nutrients.

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Conflict of interest statement

Conflicts of interest The authors declare no potential conflict of interest.

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