Determination of Leaf Area of Some Vegetable Plants Grown under Greenhouse Condition by Non-Destructive Methods

Authors : Cihan KARACA, Dursun BÜYÜKTAŞ, Süleyman ŞEHİR

Pages : 23-28

Doi:10.16882/hortis.841745

View : 18 | Download : 5

Publication Date : 2021-06-01

Article Type : Research Paper

Abstract :The use of a mathematical model approach, which is a non-destructive method to determine the leaf area, has been used safely in recent years. The most important reason for this is that the application is easy and the application cost is very low. The most important disadvantage of this method is that the derived models need calibration according to different crop varieties. In the study, firstly, the width insert ignore into journalissuearticles values(W); and length insert ignore into journalissuearticles values(L); measurements of each individual leaf taken from the crops were correlated with the actual area of the leaf and crop-specific models were developed. The actual area insert ignore into journalissuearticles values(LA); of each leaf used in the sampling was determined by the ImageJ software. In the study, 7 different models were derived for each crop species insert ignore into journalissuearticles values(1, LA=a+bL2+cL2/W2+dW2+eLW; 2, LA=a+bL2+cW2+dLW; 3, LA=a+bL2+cW2; 4, LA=aL2+bW2; 5, LA=aLb+cWd+e; 6, LA=a+bLW; 7, LA=aLW);. The coefficients in the models were determined separately for each crop species. In order to evaluate the performance of the models, some performance criteria such as determination coefficient insert ignore into journalissuearticles values(R2); and root mean square error insert ignore into journalissuearticles values(RMSE);, relative error insert ignore into journalissuearticles values(RE);, mean bias error insert ignore into journalissuearticles values(MBE); and Willmott index insert ignore into journalissuearticles values(d); were used. In this study, leaf areas were estimated with high accuracy insert ignore into journalissuearticles values(R2=0.96 for tomato; R2=0.99 for pepper, eggplant and cucumber); with these models without using expensive measuring devices.
Keywords : Solanum lycopersicum L, Solanum melongena L, Capsicum annuum L, Cucumis sativus L, Regression