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2020 Vol.62, Issue 5 Preview Page
Development of Easy Equation for Crop Water Stress Index (CWSIEE) Using the Temperature Difference between Canopy and Air (Tc-Ta) of Fruit Trees

엽온과 기온의 차이를 이용한 노지 과수의 작물 수분 스트레스 지수 산정 간편식 개발

Yonghun Choia
,
Sangbong Leeb†
,
Minyoung Kimc
,
Youngjin Kimd
,
Jonggil Jeone
,
Jeonghun Parkf
최 용훈a
,
이 상봉b†
,
김 민영c
,
김 영진d
,
전 종길e
,
박 정훈f
aPost-doctoral Researcher, Department of Agricultural Engineering, National Institute of Agricultural Sciences (NAS), Rural Development Administration (RDA)
bAgricultural Researcher, Department of Agricultural Engineering, National Institute of Agricultural Sciences (NAS), Rural Development Administration (RDA)
cAgricultural Researcher, R&D Coordination Division, Research Policy Bureau, Rural Development Administration (RDA)
dAgricultural Researcher, Department of Agricultural Engineering, National Institute of Agricultural Sciences (NAS), Rural Development Administration (RDA)
eAgricultural Researcher, Department of Agricultural Engineering, National Institute of Agricultural Sciences (NAS), Rural Development Administration (RDA)
fResearcher, Department of Agricultural Engineering, National Institute of Agricultural Sciences (NAS), Rural Development Administration (RDA)
a국가 농업 과학원 농업 공학 과 박사후 연구원, 농촌 발전 관리 국 (RDA)
b국가 농업 과학원 농업 공학 과 농업 연구원, 농촌 발전 관리 국 (RDA)
c농촌 발전 국 연구 정책 국 연구 개발 협조 처 농업 연구원
d국가 농업 과학원 농업 공학 과 농업 연구원, 농촌 발전 관리 국 (RDA)
e국가 농업 과학원 농업 공학 과 농업 연구원, 농촌 발전 관리 국 (RDA)
f국가 농업 과학원 농업 공학 과 연구원, 농촌 발전 관리 국 (RDA)
† Corresponding author Tel.: +82-63-238-4162 Fax.: +82-63-238-4145 E-mail: sblee0902@korea.kr
2020. pp. 85-91
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Abstract

In order to calculate the Crop Water Stress Index (CWSI), it is necessary to collect weather data (air temperature, humidity, wind speed and solar radiation) and canopy temperature. However, it is not always available to have necessary data sets for CWSI calculation. Therefore, this study was aimed to develop an easy and simple CWSI equation (CWSIEE) using only two data, air and canopy temperatures. Infrared sensors and weather sensors were installed on apple and peach trees and nearby a study area and every ten-minute data were collected from June to October in 2018 and 2019, respectively. A relationship between air-canopy temperature difference and CWSI was statistically analyzed and used to develop CWSIEE using the three dimensional Gaussian model. The performance of CWSIEE against original CWSI showed R2 and NSE to 0.780 and 0.710 for apple trees and R2 and NSE to 0.884 and 0.866 for peach trees. This study found that the level of crop water stress could be easily calculated using CWSIEE with only air and canopy temperature data.

Keywords
Crop water stress index (CWSI)
canopy temperature
air temperature
CWSI easy equation
References

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Information
  • Publisher :The Korean Society of Agricultural Engineers
  • Publisher(Ko) :한국농공학회
  • Journal Title :Journal of Korean Society of Agricultural Engineers
  • Journal Title(Ko) :한국농공학회논문집
  • Volume : 62
  • No :5
  • Pages :85-91
  • Received Date : 2020-08-31
  • Revised Date : 2020-09-18
  • Accepted Date : 2020-09-18
  • DOI :https://doi.org/10.5389/KSAE.2020.62.5.085
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