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Asian-Australas J Anim Sci > Accepted Articles
DOI: https://doi.org/10.5713/ajas.20.0186    [Accepted] Published online June 24, 2020.
Effects of dietary glycerol inclusion on growth performance, carcass and meat quality characteristics, glycogen content, and meat volatile compounds in Korean cattle steers
Minyu Piao1,2  , Da Jin Sol Jung1  , Hyeok Joong Kang1  , Seung Ju Park1  , Jin Oh Lee1  , Minsu Kim1  , Hyun Jin Kim1  , Do Hyun Kim1  , Ja Kyeom Seo3  , Cheorun Jo1,4  , Md Najmul Haque1  , Myunggi Baik1,4,* 
1Department of Agricultural Biotechnology and Research Institute of Agriculture and Life Sciences, College of Agriculture and Life Sciences, Seoul National University, Seoul 08826, Republic of Korea, Seoul, Korea
2Feed Research Institute, Chinese Academy of Agricultural Sciences, Beijing 100081, China, Beijing, China
3Life and Industry Convergence Research Institute and Department of Animal Science, College of Natural Resources and Life Sciences, Pusan National University, Miryang, Republic of Korea, Miryang, Korea
4Institute of Green Bio Science and Technology, Seoul National University, Pyeongchang 25354, Republic of Korea, Pyeongchang, Korea
Correspondence:  Myunggi Baik, Tel: +82-2-880-4809, Fax: +82-2-872-8583, Email: mgbaik@snu.ac.kr
Received: 24 March 2020   • Revised: 21 April 2020   • Accepted: 9 June 2020
Abstract
Objective
We have tested our hypothesis that inclusion of the purified glycerol as a replacer of portions of dried distillers grain with solubles (DDGS) would affect growth performance, rumen fermentation and blood parameters, carcass and sensory traits, reducing sugar and glycogen contents, and volatile compound profiles in longissimus thoracis (LT) in Korean cattle steers.
Methods
A total of 20 Korean cattle steers (27.0 ± 0.2 months old; 647 ± 10.5 kg body weight) were assigned to a conventional control group or a glycerol group (3.17% purified glycerol addition as a replacement for DDGS and molasses). The steers were individually allowed to receive the experimental concentrate at the daily amount of 1.5% of their individual BW and a total 1.0 of kg/d of rice straw twice daily. The feeding trial was conducted for a period of 20 weeks.
Results
Glycerol supplementation (GS) increased (P = 0.001) concentrate intake. However, GS did not affect (P > 0.05) average daily gain, feed efficiency, and ruminal volatile fatty acid concentrations. GS tended to increase (P ≤ 0.10) serum glucose concentrations at the 16th and 20th weeks. GS decreased (P = 0.001) longissimus thoracis (LT) pH. GS did not affect (P > 0.05) carcass traits and the chemical or physicochemical compositions, reducing sugar or glycogen contents, sensory traits, and most of volatile compounds in the LT.
Conclusion
The inclusion of purified glycerol as a replacement for DDGS in the finishing diet did not affect growth performance, rumen fermentation parameters, and carcass quality in Korean cattle. The purified glycerol could be used as a substitute for other energy sources such as DDGS in beef cattle, depending on the price.
Keywords: Korean Cattle Steer; Glycerol; Feed Intake; Carcass And Sensory Traits; Glycogen Contents; Volatile Compounds


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