Jensen Model and Modified Morgan Model for Rice Water-Fertilizer Production Function

The relationship of water-fertilizer and yield is the theory basis of improving water-fertilizer use efficiency and reducing fertilizer pollution. Based on analyzing a lot of experimental data, 3 fertilizer factors involving N, P, K were introduced in the growth stage model of rice water-fertilizer production function and dynamic production function model. The former is called Jensen model and the latter is called modified Morgan model. The two models have higher correlation coefficients, can correctly reflect interaction relationship between rice growth and water-fertilizer (N, P, K), accurately simulate continuous dynamic traits of rice growth and can forecast rice yield according to the amount of N, P, K applied. In addition, Modified Morgan model has a much higher correlation coefficient than Jensen model.