Sorghum×sudangrass hybrid (Sorghum bicolor (L.) Moench, SSH) is one of the most important summer forage crop and it is widely used for silage in Korea. Agriculture is highly dependent on the climate condition and experiencing significant loss of productivity due to climate change. This study was conducted to investigate the correlation analysis between productivity of forage SSH and climatic factors in Central Northern region of South Korea for 3 years (2017 to 2019). Plant height and dry matter yield of SSH were significantly higher in Gyeonggi-do than Ganwon-do. The productivity of SSH is more closely related with temperature than other climatic factors. Maximum temperature and Growing degree days in May and June showed a positive correlation. However, correlation between production of SSH and precipitation was not clear in this study, but rainy days showed a negative correlation (0.42). In conclusion, temperature is most important climatic factor to the maintenance of plant yield.

ABSTRACT
Ⅰ. 서 론
Ⅱ. 재료 및 방법
    1. 시험설계
    2. 통계처리
Ⅲ. 결과 및 고찰
    1. 수수×수단그라스 교잡종의 생육특성
    2. 수수×수단그라스 교잡종의 생산성과 기후요인간의 상관관계
Ⅳ. 요 약
Ⅵ. REFERENCES

• 이배훈(국립축산과학원 초지사료과) | Bae Hun Lee (Grassland and Forage Division, National Institute of Animal Science)
• 박형수(국립축산과학원 초지사료과) | Hyung Soo Park (Grassland and Forage Division, National Institute of Animal Science)
• 정종성(국립축산과학원 초지사료과) | Jeong Sung Jung (Grassland and Forage Division, National Institute of Animal Science) Corresponding author