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Correlation between the Maize Yield and Satellite-based Vegetation Index and Agricultural Climate Factors in the Three Provinces of Northeast China

중국 동북3성에서의 옥수수 수확량과 위성기반의 식생 지수 및 농업기후요소와의 상관성 연구

  • Park, Hye-Jin (Division of Earth Environmental System, Pusan National University) ;
  • Ahn, Joong-Bae (Division of Earth Environmental System, Pusan National University) ;
  • Jung, Myung-Pyo (Climate Change and Agroecology Division, Department of Agricultural Environment, National Institute of Agricultural Science, Rural Development Administration)
  • 박혜진 (부산대학교 지구환경시스템학부) ;
  • 안중배 (부산대학교 지구환경시스템학부) ;
  • 정명표 (국립농업과학원 농업환경부 기후변화생태과)
  • Received : 2017.08.25
  • Accepted : 2017.10.14
  • Published : 2017.10.30

Abstract

In this study, we tried to analyze the correlation between corn yield and, satellite-based vegetation index, NDVI (Normalized Difference Vegetation Index) and various climatic factors in the three provinces of Northeast China during the past 20 years (1996-2015). The corn yields in the corn cultivation area of all three provinces showed a statistically significant positive correlation with the NDVI of the harvest period. Also, these have significant negative correlation with the daily maximum temperature in August and September and the occurrence frequency of above $30^{\circ}C$ for the summer season. The correlation between the corn yields and the precipitation showed a significant positive coefficient in only Liaoning Province in July, but the correlation was not found in Jilin and Heilongjiang Provinces. In this study, the NDVI and the daily maximum temperature data are suitable to be used as predictors of corn yield in the three provinces of Northeast China provinces.

본 연구에서는 지난 20년간(1996~2015) 중국 동북 3성에서의 옥수수 수확량과 위성기반 식생지수인 NDVI (Normalized Difference Vegetation Index) 그리고 여러 기후요소들간의 월별 상관성을 분석하고자 하였다. 중국 동북 3성의 옥수수 재배지역에서 옥수수 수확량은 작황시기의 NDVI와 통계적으로 유의한 양의 상관관계를 보였고, 8월과 9월의 최고기온 및 여름철 $30^{\circ}C$ 이상의 고온 발생빈도와 음을 상관관계를 가졌다. 옥수수 수확량과 강수량간의 상관관계는 7월에 요녕성에서만 유의한 양의 계수를 나타내었고 길림성과 흑룡강성에서는 상관성이 나타나지 않았다. 본 연구를 통해 중국 동북 3성의 옥수수 수확량을 추정하기 위해서는 NDVI와 최고기온 자료를 예측인자로 사용하는 것이 적합할 것으로 생각된다.

Keywords

References

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