Method and system for evaluating tobacco field soil quality improvement by applying biochar

The invention discloses a method and system for evaluating tobacco field soil quality improvement by applying biochar, and the method comprises the steps: obtaining a soil current situation data set of a target tobacco field, extracting knowledge entities and knowledge association through employing the influence instance of biochar on soil quality and plant growth, and constructing a related knowledge graph; analyzing the influence direction of the application of the charcoal on the soil quality of the target tobacco field according to the related knowledge graph in combination with the soil current situation data set, so as to determine an evaluation index; a normal quality improvement model is constructed based on the evaluation indexes, and the ideal soil quality of the target tobacco field after the biochar is applied is predicted; the evaluation indexes are used for evaluating the soil condition data after the biochar is applied to obtain the actual soil quality, and the actual soil quality is compared w