石蒜鳞茎栽培中施用氮磷钾肥的效应

采用3因素二次通用旋转组合设计方法,建立了施氮、磷、钾肥与石蒜鳞茎质量增长量之间的效应模型,经检验二次回归模型拟合较好。通过对肥料主效应的分析得出氮、磷、钾3因素中促进石蒜磷茎质量增加作用依次为钾肥、氮肥、磷肥；对两因素交互效应的分析得出，在氮肥和钾肥、氮肥和磷肥、磷肥和钾肥处理之间都存在一定程度的正交互效应。模型经计算机模拟寻优,对于试验地块上种植的石蒜鳞茎,氮、磷、钾因素的最佳施肥组合方案为：氮肥422.4~702.2 kg/hm2、磷肥363.6~573.4 kg/hm2、钾肥299.9 kg/hm2。

The effects of N,P and K fertilizer applied in plantation of Lycoris radiata

Three factors design with universal quadratic rotation combination was used to established the effect models of the application rates of N,P and K fertilizer and the bulbous growth quantity of the plant of Lycoris radiata.The testing results showed that the quadratic regression model gave better simulation.According to the analysis of the main effect of fertilizer,it showed that N,P and K had different influences on the bulbous growth quantity,the influences on L.radiata were in such decrease order as K,N,P...