This study was conducted to figure out the productivity of Italian ryegrass(IRG) and leaching water characteristics based on horse manure compost level in Jeju. This study was conducted for about six months. Six treatments were established : non-fertilizer(NF), chemical fertilizer 100%(CF), horse manure compost 50% and chemical fertilizer 50% combination(Combination), horse manure compost with 50% of nitrogen (50%), 100% of nitrogen(100%), 150% of nitrogen(150%). The highest amount of dry matter yield of IRG was revealed in CF(11,965± 564 kg/ha), and both 150% and Combination were second(p<0.05). Nitrate leaching tended to increase until the third analysis and then decreased. There were not significantly differences among mean nitrate concentrations. The findings of the study suggest that horse manure compost with 50% of nitrogen be applied for IRG as basal fertilization and then 50% of chemical fertilizer be applied as top fertilization.

ABSTRACT
Ⅰ. 서 론
Ⅱ. 재료 및 방법
Ⅲ. 결과 및 고찰
    1. 이탈리안 라이그라스 생산성
    2. 용탈수 성분
Ⅳ. 요 약
Ⅴ. 사 사
Ⅵ. REFERENCES

• 유지현(농촌진흥청 국립축산과학원 난지축산연구소) | Ji-Hyun Yoo (National Institute of Animal Science, RDA) Corresponding author
• 박남건(농촌진흥청 국립축산과학원 난지축산연구소) | Nam-Geon Park (National Institute of Animal Science, RDA)
• 우제훈(농촌진흥청 국립축산과학원 난지축산연구소) | Jae-Hoon Woo (National Institute of Animal Science, RDA)
• 안희권(충남대학교 동물자원과학부) | Hee-Kwon Ahn (Division of Animal and Dairy Science, Chungnam National University)
• 양병철(농촌진흥청 국립축산과학원 난지축산연구소) | Byoung-Chul Yang (National Institute of Animal Science, RDA)