This study was conducted to evaluate feed value of imported hays and examine current situation of species and hay grade. To evaluate the quality of the imported hay, 133 pieces including 9 species of roughage types were collected at the national hay importers, the TMR companies and livestock farms from 2016 to 2018. The quality grades of imported hay were 3~4 and most imported hay were considered to had low. The ADF, Ash, TDN and DDM in feed composition of alfalfa by quality grades presented significant differences(p<0.05). The quality grade on alfalfa was not similar to the actual quality grades calculated through feed composition. The feed composition of grasses by quality degrees presented significant differences in all contents except DM and CP (p<0.05). As the distributed grasses of the unmarked quality grade was low quality and accounted for 49%, it is urgent to present quality standards based on feed composition. As these results, the grades of imported hays were lower than the marked quality grades. Therefore, the imported roughage’s(hay) price that considered to only quality grades on the marked imported roughages(hay) package can cause a loss to the livestock farms as economic damage. An institutional arrangement should be established to review the quality grades of imported hay.

ABSTRACT
Ⅰ. 서 론
Ⅱ. 재료 및 방법
    1. 공시재료
    2. 수분함량 및 사료가치 분석
Ⅲ. 결과 및 고찰
    1. 수입건초의 품질등급
    2. 수입건초의 이화학적 특성
Ⅳ. 요 약
Ⅴ. 사 사
Ⅵ. REFERENCES

• 이배훈(국립축산과학원) | Bae Hun Lee (National Institute of Animal Science, RDA)
• 김지혜(국립축산과학원) | Ji Hye Kim (National Institute of Animal Science, RDA)
• 오미래(국립축산과학원) | Mirae Oh (National Institute of Animal Science, RDA)
• 이기원(국립축산과학원) | Ki Won Lee (National Institute of Animal Science, RDA)
• 최기춘(국립축산과학원) | Ki Choon Choi (National Institute of Animal Science, RDA)
• 천동원(국립축산과학원) | Dong Won Cheon (National Institute of Animal Science, RDA)
• 박형수(국립축산과학원) | Hyung Soo Park (National Institute of Animal Science, RDA) Corresponding author