Effect of N Fertilizer and P Fertilizer Amount on Fertilizer Use Efficiency in Sugarcane Yield

In order to understand the influence of fertilization amount on the fertilizer use efficiency in sugarcane cultivation, this paper studied the N fertilizer and P fertilizer use efficiency at different applied rates with the result showing that the amount of fertilizer considerably affected the fertilizer use efficiency.In three years of various fertilization treatments,the average use efficiency of N fertilizer was 19.1 %-26.3 %,and the average use efficiency of P fertilizer was 12.0 %-15.3 %.N fertilizer and P fertilizer use efficiency in the optimized fertilization was proved to be the highest,however an extra 50 % of N fertilizer or P fertilizer in the optimized fertilization model dramatically brought down the use efficiency of N fertilizer and P fertilizer.Under the circumstances of local experiments,the application of 300 kg N fertilizer per hectare on one hand boosted sugarcane production;on the other hand it raised the use efficiency of N fertilizer to 45.6 %.