Rice variety classification method based on ammonium and nitrate nitrogen preference

The invention relates to the technical field of rice variety classification, in particular to a rice variety classification method based on ammonium and nitrate nitrogen preference. The classification method comprises the following steps: selecting full seeds of multiple to-be-classified rice varieties; accelerating germination of the seeds, culturing the seeds under different ammonium nitrate mixed nutrition treatment until three leaves and one core are harvested; respectively measuring rice morphological indexes under different ammonium nitrate mixed nutrition treatments, wherein the rice morphological indexes comprise the maximum root length, the plant height, the SPAD value and the biomass; performing KMO and Bartlett test, correlation analysis and collinearity diagnosis on each morphological index so as to screen out residual morphological indexes; performing principal component analysis according to the remaining morphological indexes; and carrying out clustering analysis on a comprehensive score obtain