This study was conducted in Cheonan, the middle region of South Korea, to evaluate the forage characteristics of six medium maturing Italian ryegrass varieties: ‘Kowinmaster’, ‘IR 601’, ‘IR 602’, ‘IR 603’, ‘IR 604’ and ‘IR 605’. In growth characteristics, 'Kowinmaster' exhibited the earliest heading date on April 30, while 'IR 601' exhibited the latest on May 17. 'IR 601' exhibited the highest lodging resistance, and all varieties demonstrated excellent disease resistance, waterlogging tolerance, and cold tolerance. 'IR 603', 'IR 604', and 'IR 605' demonstrated above-average plant length, with 'IR 604' reaching the longest at 114.8 cm. In productivity, 'IR 602' and 'IR 605' produced the highest total dry matter yield, each exceeding 12,800 kg/ha. Regarding feed values, 'Kowinmaster' recorded the highest RFV and TDN at 119.18 and 66.07%, respectively, with 'IR 605' exhibiting the second highest. 'IR 604' and 'IR 601' demonstrated crude protein concentrations over 9%, with 'IR 604' exhibiting the highest at 9.74%. Analysis of monosaccharide content in Italian ryegrass revealed that 'IR 605' exhibited the highest glucose and fructose content at 23.35 g/kg and 50.70 g/kg, respectively. In summary, 'IR 602' exhibited the highest productivity, 'Kowinmaster' recorded the highest feed value, and 'IR 605' exhibited the highest glucose and fructose content. Therefore, 'IR 605' is considered the most outstanding variety due to its superior productivity, second highest feed value, and significant monosaccharide content.

Ⅰ. 서론
Ⅱ. 재료 및 방법
    1. 실험장소 및 공시품종
    2. 재배방법
    3. 생육특성 조사
    4. 생산성 조사
    5. 사료가치 조사
    6. 당분석
    7. 통계분석
Ⅲ. 결과 및 고찰
    1. 생육특성
    2. 생산성
    3. 사료가치
    4. 당함량
Ⅳ. 요약
Ⅴ. 사사
Ⅵ. REFERENCES

• 민창우(국립축산과학원 초지사료과) | Chang-Woo Min (Grassland and Forage Division, National Institute of Animal Science, RDA, Cheonan 31000, Republic of Korea)
• 우제훈(국립축산과학원 초지사료과) | Jae Hoon Woo (Grassland and Forage Division, National Institute of Animal Science, RDA, Cheonan 31000, Republic of Korea)
• 최보람(국립축산과학원 초지사료과) | Bo Ram Choi (Grassland and Forage Division, National Institute of Animal Science, RDA, Cheonan 31000, Republic of Korea)
• 임은아(국립축산과학원 축산자원개발부이전추진팀) | Eun-A Lim (Relocation Service Team for Department of Animal Resources Development, National Institute of Animal Science, RDA, Cheonan 31000, Republic of Korea)
• 이기원(국립축산과학원 초지사료과) | Ki-Won Lee (Grassland and Forage Division, National Institute of Animal Science, RDA, Cheonan 31000, Republic of Korea) Corresponding author