Abstract: Using quadratic orthogonal rotating design, an optimum fertilization experiment of sugarcane was conducted on lateritic soil and paddy soil, and the optimized fertilization model for each soil was primarily decided by means of the process of establishing mathematical model, simulating and optimizing.Based on the regression coefficients of mathematical models and the fertilization schemes of single and comprehensive character indicators, the effects of the three elements of fertilizer and their fertilization levels on the yield and sucrose content of cane and the net income were compared and analyzed.

Key words: Sugarcane, Fertilization, Optimized model, completely autotrophic nitrogen removal over nitrite (CANON), denitrification, tidal flow constructed wetland (TFCW), COD/TN (C/N), anammox