Article

The effects of feeding total mixed ration with high roughage content on growth performance, carcass characteristics, and meat quality of Hanwoo steers

Min Jung Ku1, Lovelia Mamuad2, Ki Chang Nam2, Yong Il Cho2, Seon Ho Kim2, Young Sun Choi1, Sang Suk Lee2,*
Author Information & Copyright
1Livestock Research Institute, Jeonnam Agricultural Research and Extension Services, , Gangjin 59213, Korea.
2Department of Animal Science and Technology, College of Bio-industry Science, Sunchon National University, , Suncheon 57922, Korea.
*Corresponding Author: Sang Suk Lee, Department of Animal Science and Technology, College of Bio-industry Science, Sunchon National University, , Suncheon 57922, Korea, Republic of. E-mail: rumen@sunchon.ac.kr.

© Copyright 2020 Korean Society for Food Science of Animal Resources. This is an Open-Access article distributed under the terms of the Creative Commons Attribution Non-Commercial License (http://creativecommons.org/licenses/by-nc/3.0/) which permits unrestricted non-commercial use, distribution, and reproduction in any medium, provided the original work is properly cited.

Received: Jun 30, 2020 ; Revised: Aug 03, 2020 ; Accepted: Aug 21, 2020

Published Online: Sep 03, 2020

Abstract

This study investigated the dietary effect of total mixed ration (TMR) based on high roughage content on the growth performance, carcass characteristics, and meat quality of Hanwoo steers. Twenty-four Hanwoo steers (average body weight, 195.3 ± 4.7 kg; age, 8.5 mon) were randomly allocated to three experimental groups according to forage and concentrate ratio (DM basis): 25:75 (control), 50:50 (T50), and 70:30 (T70). Productivity in the fattening period and final body weight were significantly higher in the control. Average daily gain and feed conversion ratio were the same among treatments. Serum parameters, cholesterol, blood urea nitrogen, and total protein were higher in the control. Carcass weight was comparable in the control and T50 but feeding more roughage was significantly correlated with a higher intramuscular fat. Shear strength and drip loss were higher while n-6/n-3 was lower in T70 compared to the other groups. However, meat color was not significantly different among treatments. In terms of free amino acid contents, glutamic acid and glycine were higher in the control than T50 and T70. Overall, feeding Hanwoo steers with high forage content TMR had the lowest n-6/n-3 ratio of fatty acid content but highest intramuscular fat, shear strength, and drip loss. High forage content TMR is the best feed for Hanwoo steers that gives more benefits for human health and consumption but also provides the best meat grade and quality, which is important in the beef market in Korea.

Keywords: Hanwoo steers; meat quality grade; roughage; total mixed ration


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The name of the journal has been changed from Korean Journal for Food Science of Animal Resources to Food Science of Animal Resources from January 2019.

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