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Animal Breeding and Genetics
Asian-Australasian Journal of Animal Sciences 2004;17(9): 1241-1245.
https://doi.org/10.5713/ajas.2004.1241    Published online January 1, 2004.
Effects of Flaxseed Diets on Fattening Response of Hanwoo Cattle : 1. Performance and Carcass Characteristics
C. M. Kim, J. H. Kim, T. Y. Chung, K. K. Park
Two separate trials were conducted to determine effects of dietary level of whole flaxseed (WFS; 0, 10 and 15%) on feed intake, weight gain, and carcass yield and quality of Korean Hanwoo cattle. The daily gains of bulls (Trial 1) were not different among treatment groups, but those of cows (Trial 2) fed WFS 15% were higher (p<0.01) than others. Feed intake of both bulls and cows tended to decrease as dietary level of WFS increased. However, feed conversion ratio (feed/gain) of bulls tended to be improved by dietary inclusion of WFS and was significantly improved (p<0.01) in cows by increasing level of WFS. Neither carcass weight nor dressing percentage were affected by WFS level. Back fat thickness of bulls was decreased (p<0.01) by dietary inclusion of WFS and the same trend was observed in cows without statistical significance. Loin-eye area of bulls was not different among treatment groups but was significantly higher (p<0.01) in cows fed WFS. Carcass yield and quality were not improved by WFS addition. The results indicate that WFS is an acceptable fat source in diets of finishing beef cattle to increase energy density without any adverse effects.
Keywords: Hanwoo Cattle; Flaxseed; Performance; Carcass Characteristics; Oilseeds; Fat Supplementation

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