不同郁闭度下无刺构骨生长量比较研究

Comparision of Output of Llex cornuta‘Fortunei'under Different Canopy Density

[目的]对不同郁闭度下无刺构骨的地径和株高进行研究。[方法]用游标卡尺和直尺分别测量各样方内无刺构骨的地径和株高。[结果]中度郁闭的无剌构骨生长状况最优，比最高郁闭度和最低郁闭度植株地径生长量分别增产38．8％和289．8％，株高生长量分别增产48．1％和163．2％。通过曲线拟合确定最适宜无刺构骨生长的林分郁闲度为0．534—0．566。[结论]不同郁闭度条件下同一立地条件、同一年生的无刺构骨地径和株高生长量上存在显著的渐变差异。

[ Objective ] Output of Llex cornuta ‘ Fortunei＇ under different canopy density was studied. [ Method ] Plam height and diameter of Llex cornuta ‘ Fortunei＇ were measured by vernier caliper and ruler. [ Result] The output of Llex cornuta ‘ Fortunei＇ with the middle canopy density turned out better than Llex cornuta ‘ Fortunei＇ with the highest canopy density and the lowest canopy density. Llex cornuta ‘ Fortunei＇ with the middle canopy density was 38.8% and 289.8% higher than the highest and the lowest canopy density on the ground diameter, was 48.1% and 163.1% higher than the highest and the lowest canopy density on the height. The fit canopy density for Llex cornuta ‘ Fortunci＇ is between 0. 534 and 0. 566. [ Conclusion] The ground diameter and height of Llex cornuta ‘ Fortunei＇ changed gradually obvious]y under differ-ent canopy density,with the same condition and are.