Journal of Bio-Environment Control (생물환경조절학회지)

The Korean Society for Bio-Environment Control (한국생물환경조절학회)
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Estimation of Leaf Area, Leaf Fresh Weight, and Leaf Dry Weight of Irwin Mango Grown in Greenhouse using Leaf Length, Leaf Width, Petiole Length, and SPAD Value

엽장, 엽폭, 엽병장 및 SPAD 값을 이용한 온실 재배 어윈 망고의 엽면적, 엽생체중과 엽건물중 추정

  • Jung, Dae Ho (Department of Plant Science, Seoul National University) ;
  • Cho, Young Yeol (Major of Horticultural Science, Jeju National University) ;
  • Lee, Jun Gu (Department of Horticulture, Chonbuk National University) ;
  • Son, Jung Eek (Department of Plant Science, Seoul National University)
  • Received : 2016.07.28
  • Accepted : 2016.09.01
  • Published : 2016.09.30
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Abstract

Due to complicate canopy structures of Irwin mangoes grown in greenhouses, it is difficult to determine their growth parameters accurately. Leaf area, leaf fresh weight, and leaf dry weight are widely used as indicators to diagnose the tree growth. Therefore, it is necessary to establish models that can non-destructively estimate these growth indicators. The objective of this study was to establish regression models to estimate leaf area, leaf fresh weight, and leaf dry weight of Irwin mangoes (Mangifera indica L. cv. Irwin) by using leaf length, leaf width, petiole length, and SPAD value. The input values of leaf length, leaf width, petiole length, and SPAD value of 6-year old Irwin mangoes were measured, and the corresponding output values of leaf area, leaf fresh weight, and leaf dry weight were also measured. After 14 models were selected among the existing models, coefficients of the models were estimated by regression analysis. Three models with higher $R^2$ and lower RMSE values selected. In validation the $R^2$ values for the selected models were 0.967, 0.743, and 0.567 in the leaf area, leaf fresh weight, and leaf dry weight models, respectively. It is concluded that this models will be helpful to conveniently diagnose the growth of the Irwin mango.

온실에서 재배되는 어윈 망고는 그 수관이 복잡하여 생육을 정확하게 진단할 수 있는 생육 지표 결정이 어렵다. 엽면적, 엽생체중과 엽건물중은 생육을 진단할 수 있는 지표이며, 이를 비파괴적으로 추정할 수 있는 모델 확립이 필요하다. 본 연구의 목표는 어윈 망고 (Mangifera indica L. cv. Irwin)의 엽장, 엽폭, 엽병장, SPAD 값 등의 비 파괴적 생육지표를 이용하여 엽면적, 엽생체중과 엽건물중을 추정하는 모델을 확립하는 것이다. 6년생 어윈 망고의 성엽에 대하여 엽장, 엽폭, 엽병장과 SPAD 값을 측정하였으며, 이에 따른 엽면적, 엽생체중과 엽건물중을 측정하였다. 기존에 사용되는 모델식 중에서 14종의 모델을 선정하였으며, 회귀분석을 통해 각 모델의 계수를 추정하였다. 이중에서 높은 $R^2$과 낮은 평균제곱근오차 값을 보이는 세 모델식에 대하여 검증한 결과, $R^2$ 값은 각각 0.967과 0.743, 0.567로 나타나 신뢰성이 있다고 판단되었다. 이러한 방법은 작물의 생육 지표로 편리하게 추정하는데 도움을 줄 수 있다.

Keywords

References

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