Effects of Red Ginseng Byproducts on Rumen Fermentation, Growth Performance, Blood Metabolites, and mRNA Expression of Heat Shock Proteins in Heat-Stressed Fattening Hanwoo Steers

Daekyum Yoo; Hanbeen Kim; Joonbeom Moon; Jongnam Kim; Hyeran Kim; Jakyeom Seo

doi:10.3390/vetsci9050220

Effects of Red Ginseng Byproducts on Rumen Fermentation, Growth Performance, Blood Metabolites, and mRNA Expression of Heat Shock Proteins in Heat-Stressed Fattening Hanwoo Steers

Vet Sci. 2022 Apr 30;9(5):220. doi: 10.3390/vetsci9050220.

Authors

Daekyum Yoo¹, Hanbeen Kim¹, Joonbeom Moon¹, Jongnam Kim², Hyeran Kim³, Jakyeom Seo¹

Affiliations

¹ Department of Animal Science, Life and Industry Convergence Research Institute, Pusan National University, Miryang 50463, Korea.
² Department of Food and Nutrition, Dongseo University, Busan 47011, Korea.
³ Animal Nutrition and Physiology Team, National Institute of Animal Science, RDA, Jeonju-si 55365, Korea.

Abstract

The objective of this study was to evaluate the effects of dietary supplementation with red ginseng byproduct (RGB) on rumen fermentation, growth performance, blood metabolites, and mRNA expression of heat shock proteins (HSP) in fattening Hanwoo steers under heat stress. Two experimental total mixed rations (TMR) were prepared: (1) a TMR meeting the requirement of fattening beef having an average daily gain (ADG) 0.8 kg/day (CON) and (2) a TMR that included 2% RGB on a dry matter (DM) basis (GINSENG). In vitro rumen fermentation and in vivo growth experiments were conducted using two experimental diets. A total of 22 Hanwoo steers were distributed to two treatments (CON vs. GINSENG) in a completely randomized block design according to body weight (BW). The experiment was conducted during the summer season for five weeks. The final BW, ADG, DM intake, and feed conversion ratio did not differ between treatments in the growth trial. In the mRNA expression results, only HSP 90 showed an increasing tendency in the GINSENG group. The use of 2%DM RGB did not improve the growth performance or alleviate heat stress in fattening Hanwoo steers during the summer season.

Keywords: hanwoo steers; heat shock proteins; heat stress; red ginseng byproduct.

Grants and funding

This work was supported by the Rural Development Administration, Korea (Project No. PJ01491606). The funders did not play any role in this study or in the preparation of the manuscript.