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采用旋转设计,建立了壤土类型上泡桐高干壮苗函数模型;剖析了各项栽培措施对苗高和地径的贡献及互作效应;优化出1×1.2m 株行距、3月底前后埋根,种根粗度1.5～2.5cm、追施尿素50～55kg/亩和基施钙镁磷肥75～85kg/亩的高干壮苗(H>4.5m,D>6.0cm)培育措施组合,为泡桐高干壮苗培育提供了较多定量信息。
The rotation model was used to establish a function model of Paulownia tomentosa seedlings on loam soil. The contributions and interaction effects of various cultivation measures on seedling height and soil diameter were analyzed. The row spacing of 1 × 1.2 m was optimized, (H> 4.5m, D> 6.0cm) with basal root thickness 1.5-2.5cm, topdressing urea 50-55kg / mu and 75-85kg / mu K Paulownia tall dry seedling culture provides more quantitative information.