Assessment of weather events impacts on forage production trend of sorghum-sudangrass hybrid

Moonju Kim1, Kyungil Sung2,*
Author Information & Copyright
1Institute of Animal Life Science, Kangwon National University, Chuncheon 24341, Korea.
2Department of Animal Inductry Convergence, Kangwon National University, Chuncheon 24341, Korea.
*Corresponding Author: Kyungil Sung, Department of Animal Inductry Convergence, Kangwon National University, Chuncheon 24341, Korea, Republic of. Phone: +82-033-250-8635. E-mail:

© Copyright 2023 Korean Society of Animal Science and Technology. This is an Open-Access article distributed under the terms of the Creative Commons Attribution Non-Commercial License ( which permits unrestricted non-commercial use, distribution, and reproduction in any medium, provided the original work is properly cited.


This study aimed to assess the impact of weather events on the sorghum-sudangrass hybrid (<italic>Sorghum bicolor</italic> L.) cultivar production trend in the central inland region of Korea during the monsoon season, using time series analysis. The sorghum-sudangrass production data collected between 1988 and 2013 were compiled along with the production year’s weather data. The growing degree days (GDD), accumulated rainfall, and sunshine duration were used to assess their impacts on forage production (kg/ha) trend. Conversely, GDD and accumulated rainfall had positive and negative effects on the trend of forage production, respectively. Meanwhile, weather events such as heavy rainfall and typhoon were also collected based on weather warnings as weather events in the Korean monsoon season. The impact of weather events did not affect forage production, even with the increasing frequency and intensity of heavy rainfall. Therefore, the trend of forage production for the sorghum-sudangrass hybrid was forecasted to slightly increase until 2045. The predicted forage production in 2045 will be 14,926 ± 6,657 kg/ha. It is likely that the damage by heavy rainfall and typhoons can be reduced through more frequent harvest against short-term single damage and a deeper extension of the root system against soil erosion and lodging. Therefore, in an environment that is rapidly changing due to climate change and extreme/abnormal weather, the cultivation of the sorghum-sudangrass hybrid would be advantageous in securing stable and robust forage production. Through this study, we propose the cultivation of sorghum-sudangrass hybrid as one of the alternative summer forage options to achieve stable forage production during the dynamically changing monsoon, in spite of rather lower nutrient value than that of maize (<italic>Zea mays </italic>L.).

Keywords: sorghum-sudangrass hybrid; heavy rainfall; typhoons; forage production trend