This study evaluated the growth characteristics and forage productivity of quackgrass (Agropyron repens) and meadow foxtail (Alopecurus pratensis) as novel forage resources under abnormal climatic conditions in Cheonan, Chungcheongnam-do, South Korea, during the 2024–2025 growing seasons. Both species, sown on 26 September 2024, exhibited good establishment, vigorous pre-winter growth, and strong cold tolerance. Following harvest, quackgrass and meadow foxtail showed superior regrowth compared with orchardgrass and tall fescue. Dry matter yields of quackgrass (QG2), a mixed sward of meadow foxtail (50%) and quackgrass (50%), tall fescue and quackgrass (QG1) were 21.4, 20.4, 19.2 and 19.0 t ha⁻¹, respectively, with no significant differences among treatments. In contrast, the dry matter yield of meadow foxtail alone (18.4 t ha⁻¹) was significantly lower than that of quackgrass (QG2) (p<0.001). Crude protein contents of quackgrass and meadow foxtail (12.3% and 13.4%, respectively) were higher than that of tall fescue (11.9%), whereas total digestible nutrient contents ranged from 61.4% to 61.7%, slightly lower than those of tall fescue. These results suggest that quackgrass and meadow foxtail are promising forage species for mixed pasture systems to enhance adaptability to abnormal climatic conditions.

ABSTRACT
Ⅰ. 서론
Ⅱ. 재료 및 방법
    1. 토양 및 기상 환경
    2. 시험 초종
    3. 재배 방법
    4. 생육 및 수량 특성 조사
    5. 사료가치 분석
    6. 통계분석
Ⅲ. 결과 및 고찰
    1. 월동 전ㆍ후의 생육 특성
    2. 수확기 전ㆍ후의 생육 특성
    3. 초지 생산성 및 사료가치
Ⅳ. 요약
Ⅴ. 사사
Ⅵ. REFERENCES

• 최기준(서울대학교 그린바이오과학기술연구원) | Gi Jun Choi (Research Institute of Eco-friendly Livestock Science, GBST, SNU, Pyeongchang 25354, Republic of Korea)
• 김학진(서울대학교 그린바이오과학기술연구원) | Hak Jin Kim (Research Institute of Eco-friendly Livestock Science, GBST, SNU, Pyeongchang 25354, Republic of Korea)
• 이원진(서울대학교 그린바이오과학기술연구원) | Won Jin Lee (Research Institute of Eco-friendly Livestock Science, GBST, SNU, Pyeongchang 25354, Republic of Korea)
• 김종근(서울대학교 그린바이오과학기술연구원, 서울대학교 국제농업기술대학원) | Jong Geun Kim (Research Institute of Eco-friendly Livestock Science, GBST, SNU, Pyeongchang 25354, Republic of Korea, Graduate School of International Agricultural Technology, SNU, Pyeongchang 25354, Republic of Korea) Corresponding author
• Yan Fen Li(서울대학교 국제농업기술대학원)
• Xaysana Panyavong(서울대학교 국제농업기술대학원)
• Li Zhuang Wu(서울대학교 국제농업기술대학원)
• 양승학(국립축산과학원 조사료생산시스템과) | Seoung Hak Yang (Forage Production System Division, NIAS, RDA, Cheonan 31000, Republic of Korea)
• 정순우(천안시농업기술센터) | Soon Woo Joung (Cheonan Agricultural Technology Center, Cheonan 31233, Republic of Korea)