基质高产栽培番茄氮磷钾优化施肥方案研究

采用二次回归饱和D-最优试验设计方法，研究了固态N、P和K肥施用量对日光温室有机生态型无土栽培长季节番茄产量的影响，建立了N、P和K肥施用量与番茄产量形成之间的方程模型。结果表明：N、P及K对长季节栽培番茄的早期、中期和后期产量都有明显的影响，番茄前期的最佳施肥量（单位：g／株·次。以下同）为N=0.72，P2O5=0．32，K2O=1．04；番茄生长中期N、K肥的需求量增加，番茄中期的最佳施肥量为N=0．85．P2O5=0．22，K2O=1．40;番茄生长后期，N和K肥需求量都稍有所下降，最佳施肥量为N=0．78，P2O3=0．25，K2O=1．27。

Study on Optimization of N, P and K Fertilizer on High Yield Tomato Cultivation in Growing Media

Application of saturated D-optimal design,total of 10 treatments,experiment on effect of nutrient N,P and K on yield of long term tomato cultivation was conducted by directly supplying solid N,P and K fertilizer(mixture of organic and inorganic fertilizers) in eco-organic type soilless culture system,related models between fertilization amount and yield at different growth stage were established.The results indicated that N,P and K nutrient had significant effects on tomato early,middle and late yield.The optimum fertilization amount of N,P_2O_5 and K_2O were 0.72(g/plant/time,the same as the following),0.32 and 1.04 respectively during early growing stage of tomato.The demand for N and K increased during middle growth period,the optimum fertilization amount of N,P_2O_5 and K_2O were(0.85),0.22 and 1.40 respectively.And then demand for N and K slightly decreased during late growth period,the optimum fertilization amount of N,P_2O_5 and K_2O were 0.78,0.25 and 1.27 respectively.