This study was conducted to establish spring sowing techniques in preparation for the impacts of climate change on sowing time and wintering rates of winter forage crops such as barley, oat and IRG. Oat showed the highest yield in 2017 which had relatively dry climate condition. And when sowing in late Febrnary 2017 yielding 9,408kg/ha were obtained, yielding 4,011kg/ha more than IRG's sown in the same period. In 2018 which had relatively wet climate condition, four barley species decreased in the production from the previous year. Oat also had decreased by 70% from 9,408kg/ha to 2,851kg/ha. On the other hand, IRG maintained the production in the mid-5,000kg/ha range. It was also found that IRG had the least variability due to external influences regardless of seeding period for 2 years. Mixed sowing with IRG and oat in 50:50 ratio was the highest dry matter, 6,584kg/ha, and IRG was 18.5% and Oat was 2.3 times higher than single planting.

ABSTRACT
Ⅰ. 서 론
Ⅱ. 재료 및 방법
    1. 포장조건 및 재배방법
    2. 생육특성 및 수량조사
    3. 화학적 성분 및 사료가치 분석
    4. 통계분석
Ⅲ. 결과 및 고찰
    1. 생육특성
    2. 생산성
    3. 사료가치
Ⅳ. 요 약
Ⅴ. 사 사
Ⅵ. REFERENCES

• 남철환(전라남도농업기술원 축산연구소) | Cheol Hwan Nam (Livestock Institute, Jeollanamdo Agricultural Research and Extension Services) Corresponding author
• 김기수(전라남도농업기술원 축산연구소) | Ki Soo Kim (Livestock Institute, Jeollanamdo Agricultural Research and Extension Services)
• 박만호(전라남도농업기술원 축산연구소) | Man Ho Park (Livestock Institute, Jeollanamdo Agricultural Research and Extension Services)
• 윤안아(전라남도농업기술원 축산연구소) | An A Yun (Livestock Institute, Jeollanamdo Agricultural Research and Extension Services)
• 박종호(국립식량과학원) | Jong Ho Park (National Institute of Crop Science, RDA)
• 한옥규(국립한국농수산대학) | Ouk Kyu Han (Korea National College of Agriculture and Fisheries)
• 김원호(국립축산과학원) | Won Ho Kim (National Institute of Animal Science, RDA)
• 선상수(전남대학교) | Sang Soo Sun (Dept of Animal Science, Chonnam National University)