【摘要】 采用三元二次旋转回归组合设计,建立氮磷钾不同施肥量对香椿苗高、地径和茎干生物量的回归模型,分析氮磷钾施肥量对苗木生长的效应。结果表明,不同肥料对香椿苗高、地径和茎干生物量的效应大小表现为施氮量>施磷量>施钾量,钾肥对香椿苗木生长的影响不显著。采用10 kg黄心土盆栽培育香椿苗,施N量为4.277 g/盆、施P₂O₅量为2.450 g/盆,苗高生长量最大可达141.96 cm;施N量为4.845 g/盆、施P₂O₅量为2.896 g/盆,地径生长量最大可达16.895 mm;施氮量为4.101 g/盆、施P₂O₅量为2.000 g/盆,茎干生物量最大可达52.529 g。更多还原

【Abstract】 The quadratic regression rotation composite design was used to study the effects of nitrogen,phosphorus and potassium fertilization on the growth of Toona sinensis seedlings. The regression model among NPK fertilizer amount and the height ground diameter and stem biomass of T. sinensis seedling was established and their effects on seedling growth were analyzed. The effects of different fertilizers on seedling height,ground diameter and stem biomass showed N>P>K,and the effect of potassium fertilizer on growth of T. sinensis seedlings was not significant. When T. sinensis seedling was planted in the pot with 10 kg yellow soil,the seedling height was the highest with 141.96 cm in the pot with 4.277 g nitrogen and 2.450 g P₂O₅,the seedling diameter was the widest with 16.895 mm in the pot with 4.845 g nitrogen and 2.896 g P₂O₅,and the seedling stem biomass was the higest with 52.529 g in the pot with 4.845 g nitrogen and 4.101 g P₂O₅.更多还原