Journal of The Korean Society of Grassland and Forage Science (한국초지조사료학회지)

The Korean Society of Grassland and Forage Science (한국초지조사료학회)
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Calculated Damage of Italian Ryegrass in Abnormal Climate Based World Meteorological Organization Approach Using Machine Learning

  • Jae Seong Choi (College of Animal Life Sciences, Kangwon National University) ;
  • Ji Yung Kim (College of Animal Life Sciences, Kangwon National University) ;
  • Moonju Kim (Institute of Animal Resources, Kangwon National University) ;
  • Kyung Il Sung (College of Animal Life Sciences, Kangwon National University) ;
  • Byong Wan Kim (College of Animal Life Sciences, Kangwon National University)
  • Received : 2023.09.18
  • Accepted : 2023.09.26
  • Published : 2023.09.30
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Abstract

This study was conducted to calculate the damage of Italian ryegrass (IRG) by abnormal climate using machine learning and present the damage through the map. The IRG data collected 1,384. The climate data was collected from the Korea Meteorological Administration Meteorological data open portal.The machine learning model called xDeepFM was used to detect IRG damage. The damage was calculated using climate data from the Automated Synoptic Observing System (95 sites) by machine learning. The calculation of damage was the difference between the Dry matter yield (DMY)normal and DMYabnormal. The normal climate was set as the 40-year of climate data according to the year of IRG data (1986~2020). The level of abnormal climate was set as a multiple of the standard deviation applying the World Meteorological Organization (WMO) standard. The DMYnormal was ranged from 5,678 to 15,188 kg/ha. The damage of IRG differed according to region and level of abnormal climate with abnormal temperature, precipitation, and wind speed from -1,380 to 1,176, -3 to 2,465, and -830 to 962 kg/ha, respectively. The maximum damage was 1,176 kg/ha when the abnormal temperature was -2 level (+1.04℃), 2,465 kg/ha when the abnormal precipitation was all level and 962 kg/ha when the abnormal wind speed was -2 level (+1.60 ㎧). The damage calculated through the WMO method was presented as an map using QGIS. There was some blank area because there was no climate data. In order to calculate the damage of blank area, it would be possible to use the automatic weather system (AWS), which provides data from more sites than the automated synoptic observing system (ASOS).

Keywords

Acknowledgement

This study supported through the"Damage assessment in forages and development of cultivation technology for their damage reduction according to extreme weather (RDA-PJ01499603)" through Rural Development Administration, Korea and the research grant of Kangwon National University in 2022.

References

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