Effects of high energy diet on growth performance, carcass characteristics, and blood constituents of final fattening Hanwoo steers

Chung, K.-Y.; Kim, H.J.; Park, B.H.; 장선식; 이은미; 권응기

Korean Journal of Agricultural Science 42(3): 261-268

2015


ISSN/ISBN: 2466-2402
Accession: 070462936

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Abstract
The aim of this study was to examine the effects of high energy diet on growth 26mon, 28mon, and 30mon in Hanwoo at different ages. High energy diet required not only an amount of concentrate on days of fattening periods but also induced cost for the management. We hypothesized that high energy diet was able to reduce a fattening period to reach a certain quality grade. A 2 x 3 factorial arrangement (High energy, control vs 26, 28, 30month endpoints) in a completely random design was used to feed 48 Hanwoo steers. Four steers were fed in same pen and 12 pens were used for treatment. Blood was drawn from each steers on every other months during early, middle, and final fattening periods. Over all ADG and feed efficiency were not different between high energy and control diet (P > 0.05). Dry matter intake was induced 30 mo-old early and final fattening periods at high energy diet. Serum glucose concentration were increased (P < 0.05) at 30 and 26month old steers. Marbling scores were greater at 30 month old than 26 and 28 month old Hanwoo steers. Carcass weight of Hanwoo steers were greater at 30 mon-old groups than other groups.These result indicated that high energy diet (+3% TDN) and slaughter endpoint collectively contribute to the observed quality grade compositional differences among three final fattening periods of Hanwoo steers.