엽온과 기온의 차이를 이용한 노지 과수의 작물 수분 스트레스 지수 산정 간편식 개발
Development of Easy Equation for Crop Water Stress Index (CWSIEE) Using the Temperature Difference between Canopy and Air (Tc-Ta) of Fruit Trees
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초록
In order to calculate the Crop Water Stress Index (CWSI), it is necessary to collect weather data (air temperature, humidity, wind speed and solarradiation) and canopy temperature. However, it is not always available to have necessary data sets for CWSI calculation. Therefore, this study wasaimed to develop an easy and simple CWSI equation (CWSIEE) using only two data, air and canopy temperatures. Infrared sensors and weather sensorswere 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 threedimensional Gaussian model. The performance of CWSIEE against original CWSI showed R2 and NSE to 0.780 and 0.710 for apple trees and R2 andNSE 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 airand canopy temperature data.
Abstract
In order to calculate the Crop Water Stress Index (CWSI), it is necessary to collect weather data (air temperature, humidity, wind speed and solarradiation) and canopy temperature. However, it is not always available to have necessary data sets for CWSI calculation. Therefore, this study wasaimed to develop an easy and simple CWSI equation (CWSIEE) using only two data, air and canopy temperatures. Infrared sensors and weather sensorswere 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 threedimensional Gaussian model. The performance of CWSIEE against original CWSI showed R2 and NSE to 0.780 and 0.710 for apple trees and R2 andNSE 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 airand canopy temperature data.
참고문헌 (19)
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