Estimation of Potato Biomass and Yield Based on Machine Learning from Hyperspectral Remote Sensing Data

: The estimation of potato biomass and yield can optimize the planting pattern and tap the production potential. Based on partial least square (PLSR), multiple linear regression (MLR), support vector machine (SVM), random forest (RF), BP neural network and other machine learning algorithms, the biomass estimation model of potato in different growth stages is constructed by using single variables such as original spectrum, first-order differential spectrum, combined spectrum index and vegetation index (VI) and their coupled combination variables. The accuracy of the models is compared and analyzed, and the best modeling method of biomass in different growth stages is selected. Based on the optimized modeling method, the biomass of each growth stage is estimated, and the yield estimation model of different growth stages is constructed based on the estimation results and the linear regression analysis method, and the accuracy of the model is verified. The results showed that in tuber formation stage, starch accumulation stage and maturity stage, the biomass estimation accuracy based on combination variable was the highest, the best modeling method was MLR and SVM, in tuber growth stage, the best modeling method was MLR, the effect of yield estimation is good. It provides a reference for the algorithm selection of crop biomass and yield models based on machine learning.