“The strip intercropping model of oats and soybeans has a nitrogen absorption advantage during the jointing stage of oats, but during the filling stage of oats, the increase in nitrogen absorption by intercropping oats is difficult to compensate for the decrease in nitrogen absorption by soybeans, resulting in a weakening of the system's nitrogen absorption advantage. Hebei experts establish field positioning experiments to explore the mechanism of inter species nitrogen competition and provide solutions for optimizing nitrogen management in compound planting.”