Abstract: According to the relationship between agronomical characteristics and yield formation, for two kinds of multiple regression models (i. e. successive addition and multiplication), the weighted coefficient of each stage having influnce on yield was respectively given out, based on which and the fitting accuracy of submodel of each stage, two kinds of improved multiple regression modles were established, with elimination of the weakness of general multiple model.

Key words: Yield prediction Weighted multiple regression model, Yield prediction Weighted multiple regression model