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Model establishment for grape leaves dry-basis moisture content based on spectral signature |
Key Laboratory of Modern Agricultural Equipment and Technology, Ministry of Education and Jiangsu Province, Jiangsu University Zhenjiang, Jiangsu 212013, China)
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Abstract The grape water stress condition was quantitatively analyzed by using spectroscopy. From the spectral data of grape leaves under different water stress, it was found that the linear relationships between dry-basis moisture content of grape leaf and spectral reflectance data in 460, 720, 1 450, 1 650, 1 920 nm and the derivative data in 703 nm were very notable. In the case of the effect of multiple colinearity, the method of principal component regression was used to establish the model of the dry-basis moisture content of grape leaves. The correlation coefficient between the predicted data and the measurement data is 0.94, and the root mean square error is 0.15.
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