Alfalfa hay varieties have been developed and cultivated in Korea to enhance the self-sufficiency rate of domestic roughage. The objective of this study was to compare the effects of feeding domestic and imported alfalfa on the growth performance and economic feasibility of Hanwoo bulls. This study was conducted using eight Hanwoo bulls, aged 6 to 7 months, during their growing period. Hanwoo bulls were divided into two groups: one group fed imported alfalfa and the other group fed domestic alfalfa. Dry matter intake, weight gain, and blood metabolites were analyzed for two months of the growing stage. There was no significant difference between the two groups in dry matter intake and body weight. However, the price of domestic alfalfa is lower than that of imported alfalfa, so feeding domestic alfalfa is expected to have a positive effect on reducing production costs. Further study is needed to compare not only the growth performance but also carcass characteristics after slaughter by feeding domestic alfalfa to Hanwoo for a longer period during their growing stage.

ABSTRACT
Ⅰ. 서론
Ⅱ. 재료 및 방법
    1. 공시동물 및 시험사료
    2. 사양 성적
    3. 혈중대사물질 분석
    4. 사료비용 비교 분석
    5. 통계처리
Ⅲ. 결과 및 고찰
    1. 체중, 체위, 사료섭취량 측정 및 사료요구율 분석
    2. 혈중대사물질
    3. 사료비에 의한 경제성
Ⅳ. 요약
Ⅴ. 사사
Ⅵ. REFERENCES

• 문성진(국립축산과학원 한우연구소) | Sung Jin Moon (Hanwoo Research Institute, National Institute of Animal Science, RDA)
• 백열창(국립축산과학원 한우연구소) | Youl Chang Baek (Hanwoo Research Institute, National Institute of Animal Science, RDA)
• 장선식(국립축산과학원 한우연구소) | Sun Sik Jang (Hanwoo Research Institute, National Institute of Animal Science, RDA)
• 박명선(국립축산과학원 한우연구소) | Myung Sun Park (Hanwoo Research Institute, National Institute of Animal Science, RDA)
• 강성식(국립축산과학원 한우연구소) | Sung Sik Kang (Hanwoo Research Institute, National Institute of Animal Science, RDA)
• 김현주(국립축산과학원 한우연구소) | Hyung Ju Kim (Hanwoo Research Institute, National Institute of Animal Science, RDA)
• 원정일(국립축산과학원 한우연구소) | Jung Il Won (Hanwoo Research Institute, National Institute of Animal Science, RDA)
• 진실(국립축산과학원 한우연구소) | Shil Jin (Hanwoo Research Institute, National Institute of Animal Science, RDA)
• 김의형(국립축산과학원 가금연구소) | Ui Hyung Kim (Poultry Research Institute, National Institute of Animal Science, RDA)
• 정종성(국립축산과학원 초지사료과) | Jeong Sung Jung (Grassland and Forage Division, National Institute of Animal Science, RDA)
• 엄경환(국립축산과학원 한우연구소) | Kyung Hwan Um (Hanwoo Research Institute, National Institute of Animal Science, RDA) Corresponding author