Coastal Protection Forest Species Litsea Glutinosa And Casuarina Seedlings Effect Of Fertilization

This paper is issued by potted Litsea glutinosea and Casuarina trickle test,applied quadratic general rotation design, the ratio of different fertilization on the growth status of the two species. Through the establishment of mathematical model equations for significance testing and optimal solution for optimum N,P,K,fertilization ratio. Application of DRIS graphic and index, respectively, diagnosis of plant nutrition, fertilizer obtained the needs of each processing order. The result aims to fertilizer, improved growth status of the two species.1. Potted Litsea glutinosa seedlings height,diameter,biomass of the mathematical model, the significance test, the results have reached a significant level, indicating that the N,P,K fertilizers in the different treatments on the Litsea glutinosa seedling growth significantly. Mathematical model of height regression equation y=19.602-21.385X₁-8.849X₂+11.720X₃+1.845X₁²+0.843X₂²-11.570X₃²+10.612X₁X₂+11.747X₁X₃-2.643X₂X₃, the maximum height obtained by the optimal solution can be achieved 11.78cm, corresponding to the N,P,K fertilizer application rates were:0.955g/pot,0.67g/pot,0.915g/pot; diameter model regression equation y=15.242-38.600X₁-6.257X₂+2.125X₃+13.9637X₁²-4.684X₂²-2.282X₃²+23.866X₁X₂+3.255X₁X₃-1.929X₂X₃,the optimal solution was the maximum amount for the diameter1.25mm, corresponding to N,P,K fertilizer application rates were:0.625g/ pot,0.808g/pot,0.57g/pot; biomass model fitted regression equation y=17.277+12.857X₁-14.259X₂+2.88X₃-10.928X₁²+7.564X₂²-12.571X₃²-9.347X₁X₂+18.772X₁X₃-1.217X₂X₃,the optimal solution have a maximum biomass 11.57g, corresponding to the N, P, K fertilizer application rates were:0.358g/pot, 1.19g/pot, 0.324g/pot.Litsea glutinosausing DRIS nutritional diagnosis on the N,P,K nutrient diagnosis, through the important parameters of the variance calculated N/P,N/K,K/P. Graphical method derived from the DRIS N,P,K ratio of the three elements of the best range of N/P = 2.2287 5.4641, N/K = 1.6444 1.707, K/P = 1.7496 2.7992, the most balanced nutrient processing 17,18 , 15,16,19,20,8 nutrient balance in the 5 treatment is also good. By DRIS index, obtained for 15 to 20 from the value close to 0, indicating the 6 more balanced nutrient treatments, the results are consistent with the graphical method, when N, P, K fertilizer application rate was: 0.90 g/pot, 1.00g / pot, 0.70g / pot.2. Potted Casuarina height,diameter,biomass of the mathematical model, the significance test, the results have reached a significant level, indicating that the N,P,K fertilizer seedlings of different treatments on growth of Casuarina significant. Mathematical model of height regression equation y=40.525+12.562X₁+9.151X₂-79.245X₃-25.803X₁²-2X₂²-25.521X₃²-2.83X₁X₂+98.2643X₁X₃+12.08X2X₃, the maximum height obtained by the optimal solution can be achieved 45.78cm, corresponding to the N,P,K fertilizer application rates were: 0.62g/pot,2.679g/pot,0.275g/pot; diameter model regression equation y=3.422-3.12X₁-0.089X₂-1.359X₃+0.502X₁²-0.047X₂²-6.253X₃²+0.669X₁X₂+7.113X₁X₃+0.886X₂X₃,the optimal solution was the maximum amount for the diameter2.82mm, corresponding to N,P,K fertilizer application rates were: 0.219g/ pot,2.375g/pot,0.184g/pot; biomass model fitted regression equation y=46.833-72.895X₁-9.212X2-57.517X₃+9.357X₁²+0.198X₂²-51.701X₃²+19.678X₁X₂+139.95X₁X₃+11.906X₂X₃,the optimal solution have a maximum biomass19.84 g, corresponding to the N,P,K fertilizer application rates were: 0.329g/pot,2.298g/pot,0.154g/pot.Casuarina using DRIS nutritional diagnosis of the N,P,K nutrient diagnosis, through the important parameters of the variance calculated P/N,K/N,K/P. Graphical method derived from the DRIS N,P,K ratio of the three elements of the best range of P/N = 0.2919 0.3429,K/N = 0.7469 1.4851,K/P = 3.1701 3.9427, the nutrient treatment 15,17,18 The most balanced, 16,19,20,8,9,11 the nutrient balance of 6 treatments are better. By DRIS index, obtained for 15 to 20 from the value close to 0, indicating the 6 more balanced nutrient treatments, the results are consistent with the graphical method, when N,P,K fertilizer application rate was: 0.46g/pot,2.00g/pot,0.26g/pot.