Korean Journal of Agricultural and Forest Meteorology (한국농림기상학회지)

Korean Society of Agricultural and Forest Meteorology (한국농림기상학회)
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A Thermal Time - Based Phenology Estimation in Kimchi Cabbage (Brassica campestris L. ssp. pekinensis)

온도시간 기반의 배추 생육단계 추정

  • Kim, Jin-Hee (Agricultural Climatology Lab., College of Life Sciences, Kyung Hee University) ;
  • Yun, Jin I. (Agricultural Climatology Lab., College of Life Sciences, Kyung Hee University)
  • 김진희 (경희대학교 식물.환경신소재공학과) ;
  • 윤진일 (경희대학교 식물.환경신소재공학과)
  • Received : 2015.10.27
  • Accepted : 2015.11.26
  • Published : 2015.12.30
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Abstract

A thermal time-based phenology model of Kimchi cabbage was developed by using the field observed growth and temperature data for the purpose of accurately predicting heading and harvest dates among diverse cropping systems. In this model the lifecycle of Kimchi cabbage was separated into the growth stage and the heading stage, while the growth amount of each stage was calculated by optimal mathematical functions describing the response curves for different temperature regimes. The parameter for individual functions were derived from the 2012-2014 crop status report collected from seven farms with different cropping systems located in major Kimchi cabbage production area of South Korea (i.e., alpine Gangwon Province for the summer cultivation and coastal plains in Jeonnam Province for the autumn cultivation). For the model validation, we used an independent data set consisting of local temperature data restored by a geospatial correction scheme and observed harvest dates from 17 farms. The results showed that the root mean square error averaged across the location and time period (2012-2014) was 5.3 days for the harvest date. This model is expected to enhance the utilization of the Korea Meteorological Administration's daily temperature data in issuing agrometeorological forecasts for developmental stages of Kimchi cabbage grown widely in South Korea.

기온자료만으로 배추의 결구시기 및 수확적기를 정확하게 예측하기 위해 실측자료에 근거한 배추 생육단계 예측모형을 개발하였다. 이 모형에서는 배추의 일생을 생육기와 결구기로 나누고 각각에 대해 매일의 생장량이 최적 함수식에 의해 계산된다. 최적 함수식의 도출에는 강원도 고랭지 여름배추 주산지와 전남 해남의 가을배추 주산지 7개 농가, 8개 작형에서 수집된 2012-2014년 자료가 활용되었다. 예측모형의 성능검증에는 같은 지역의 다른 농가 17개에서 수집된 생육자료와 소기후모형에 의해 복원된 국지기온자료로 구성된 독립자료세트가 사용되었는데, 17개 지점의 3년간 수확예정일 평균추정오차(RMSE)는 5.3일 이었다. 이 모형은 기상청의 일별 기온자료를 이용하여 다양한 지역과 작형에서 재배되는 배추의 결구기와 수확기를 예측하는 소위 '농업기상예보' 목적으로 활용될 수 있을 것이다.

Keywords

References

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Cited by

  1. Projecting the Spatio-Temporal Change in Yield Potential of Kimchi Cabbage (Brassica campestris L. ssp. pekinensis) under Intentional Shift of Planting Date vol.18, pp.4, 2016, https://doi.org/10.5532/KJAFM.2016.18.4.298
  2. Optimizing growth conditions for glucosinolate production in Chinese cabbage vol.59, pp.5, 2018, https://doi.org/10.1007/s13580-018-0084-1
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