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Model Assessment Multi-temporal Monitoring of Chinese Cabbage Growth using Low Altitude Remote Sensing System KCI 등재

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농업생명과학연구 (Journal of Agriculture & Life Science)
경상대학교 농업생명과학연구원 (Institute of Agriculture & Life Science, Gyeongsang National University)
초록

It is necessary to monitor growth status of the crops due to continuous change of climate causing insecurity in crop cultivation. Low altitude remote sensing(LARS) system is utilized to accurately monitor the growth status of the crops. In this study, models for monitoring fresh weight(FW), one of the major growth factors of Chinese cabbage, were developed with structural indices and simple ratio calculated from bands in remotely sensed canopies by NIR, RE(imaging sensor A) and multispec-4c sensors(imaging sensor B) equipped with fixed-wing UAV depending on vegetation stages of normal planting(NP) and delayed planting(DP) Chinese cabbages. In results of imaging sensor A, the estimation models using structural indices and simple ratio were divided into NP and DP due to different attribute of reflectance in canopies with changed environment condition depending on different planting dates. The estimation models using simple ratio calculated by red edge and visible bands of NP showed better performance than other models, but RMSE was high. The models using simple ratio calculated by same bands of DP were feasible to accurately estimate FW(R2 of more than 0.946 with RMSE of less than 169.5 g). In results of imaging sensor B, the estimation models using structural indices and simple ratio on DP were divided into low to intermediate FW and intermediate to high FW. As a result, estimation models of all structural indices and simple ratio in low to intermediate FW bands were advisable to estimate FW(R2 of more than 0.860 with RMSE of less than 104.7 g). Estimation models of those calculated by red edge and visible bands in intermediate to high FW were only possible to accurately estimate FW(R2 of more than 0.532 with RMSE of less than 400.7 g).

저자
  • Ye Seong Kang(Division of Bio-System Engineering, Gyeongsang National University, Institute of Agriculture & Life Science, Gyeongsang National University)
  • Seong Heon Kim(Division of Bio-System Engineering, Gyeongsang National University, Institute of Agriculture & Life Science, Gyeongsang National University)
  • Jeong Gyun Kang(Division of Bio-System Engineering, Gyeongsang National University, Institute of Agriculture & Life Science, Gyeongsang National University)
  • Tapash Kumar Sarkar(Division of Bio-System Engineering, Gyeongsang National University)
  • Young Seok Kwon(Vegetable Research Division, National Institute of Horticultural & Herbal Science)
  • Sae Rom Jun(Division of Bio-System Engineering, Gyeongsang National University)
  • Won Jun Kim(Division of Bio-System Engineering, Gyeongsang National University)
  • Chan Seok Ryu(Division of Bio-System Engineering, Gyeongsang National University, Institute of Agriculture & Life Science, Gyeongsang National University) Corresponding author