The DRIS Nutrient Diagnosis Analysis of N, P, K in Cinnamomum camphora var.iinaloolifera Under Different Fertilization Proportions

Made oneyearold Cinnamomum camphora var. iinaloolifera as research object and used the quadratic orthogonal rotational combination design with three factors, N, P and K content of different organic was measured to calculated the coefficient of variance, and then analyzed the demands of N, P and K by applying DRIS, graphical index method. The optimal pair wise ratios of N, P and K were determined as P/N=01414-00948, K/N=01744-01530, P/K=08367-05979 from the DRIS diagrams. It indicated that the equilibrium was achieved for methods 19 and 20. The DRIS index was in accordance with the DRIS diagram by showing the fact that all nutrient indexes of methods 15-20 were close to zero which indicated the nutrition were relatively balanced for these 6 methods. Therefore, it was concluded the demands in order from greatest to least was N, P, and K proved by both DRIS diagrams and DRIS index analyses.