This study was to investigate the effect of the horse grazing intensity on the vegetation of the S. quelpaertensis, and the physiological changes of the horse. This experiment was conducted at the community of the S. quelpaertensis (altitude of 550m) with the grazing intensity of 1.0AU(500kg), 1.5AU(750kg) and 2.0AU(1,000kg) at 30m × 30m for one week, and then the growth characteristics of the S. quelpaertensis, the changes of the vegetation, the damages on trees and the changes in the physiological characteristics of the horses was investigated and compared before and after the horse grazing. As the results, the 2.0AU grazing land showed that the culm number had the inverse correlation (r=-0.902, P〈0.01) to the other lands and the species diversity index of lower-level vegetation showed the correlation (r=0.773, P〈0.01) as increasing the grazing intensity.

ABSTRACT
Ⅰ. 서 론
Ⅱ. 재료 및 방법
    1. 시험장소 및 재료
    2. 말 방목 강도에 따른 제주조릿대의 생육특성 및 주변식생 조사
    3. 말 체중 및 혈액 중 물질 변화
    4. 시험 방목지 내 수목 분포 현황 및 피해율 조사
Ⅲ. 결과 및 고찰
    1. 말 방목 강도에 따른 제주조릿대 생육특성 및 주변식생 변화
    2. 제주조릿대 군락지 방목에 따른 말의 생리적 변화
    3. 제주조릿대 군락지내 수목 분포 및 피해현황
Ⅳ. 요 약
Ⅴ. 사 사
Ⅵ. REFERENCES

• 우제훈(농촌진흥청 국립축산과학원 난지축산연구소) | Jae-Hoon Woo (National Institute of Animal Science, RDA)
• 박남건(농촌진흥청 국립축산과학원 난지축산연구소) | Nam Geon Park (National Institute of Animal Science, RDA)
• 김남영(농촌진흥청 국립축산과학원 난지축산연구소) | Nam-Young Kim (National Institute of Animal Science, RDA)
• 신상민(농촌진흥청 국립축산과학원 난지축산연구소) | Sang-Min Shin (National Institute of Animal Science, RDA)
• 신문철(농촌진흥청 국립축산과학원 난지축산연구소) | Moon-Cheol Shin (National Institute of Animal Science, RDA)
• 유지현(농촌진흥청 국립축산과학원 난지축산연구소) | Ji-Hyun Yoo (National Institute of Animal Science, RDA)
• 황원욱(농촌진흥청 국립축산과학원 난지축산연구소) | Won-uk Hwang (National Institute of Animal Science, RDA)
• 양병철(농촌진흥청 국립축산과학원 난지축산연구소) | Byung-Chul Yang (National Institute of Animal Science, RDA)
• 김현철(세계유산본부 한라산연구부 생물자원연구과) | Hyun-Cheol Kim (World Heritage Office, Jeju Special Self-Governing Provincial Government) Corresponding author