Spectral Characteristics Analysis and Water Content Detection of Potato Plants Leaves

The water content of potato leaves in different leaf positions was studied using hyperspectral technique in this research. According to leaf position, the leaves were divided into upper, middle and lower 3 groups. The experiment was conducted, in which the fresh leaves were collected and dried, and the reflectance spectra and water content were measured. The relationship between the spectral characteristics of different leaf positions and water content distribution of potato plants was analyzed. It was found that the reflectance and water content of fresh leaves in different positions were different. With the leaf position from top to bottom, the reflectance increased successively (R upper R middle >R lower) in 1403.6-1704.2 nm and the average value of water content increased in turn. After drying, with the leaf position from top to bottom, the spectral reflectance of leaves decreased successively (R upperMore