灰木莲不同造林密度的幼林生长及形质性状效应研究

Effects of Different planting Density young Forest Growth and Form Quality Traits of Manglietia conifera

摘要:

为探寻闽南山地灰木莲的合理种植密度,以促进林分高效生长,在闽南山地开展灰木莲 6种不同初植密度试验, 分析比较不同初植密度对 5 a生幼林生长及形质性状的影响效应,结果表明:种植密度对灰木莲的幼林生长和形质性状存 在显著性影响,种植密度越大,树高、胸径、枝下高、主干分叉性、侧枝密度、侧枝角度等性状表现越好,而种植密度对冠幅、 主干通直度、侧枝粗细等性状无显著性影响。 综合各项生长指标效应,灰木莲适宜的初植密度为 1667~3333株 ● hm- 2 (株行距 1. 5 m × 2. 0 m和 2. 0 m × 3. 0 m),能有效促进灰木莲快速生长以及形成较好的形质性状。

Abstract:

In order to explore the reasonable planting density which is beneficial to the early growth of Manglietiaconif- era and achieve better growth benefit of plantation, this paper selected six afforestation densities to carry out density ex- periments on M. conifera . According to the observation data of pure M. conifera forest for five years, variance analysis was carried out. The results showed that planting density had significant influence on the growth of M. conifera in the five years before afforestation . The higher the density, the better the performance of tree height,DBH,height under branches , trunk bifurcation, lateral branch density and lateral branch angle, while the planting density had no significant effect on the performance of crown width, trunk straightness and lateral branch diameter . Therefore, dense planting methods (1. 5 m ×1. 5 m,1. 5 m ×2. 0 m and 2. 0 m × 3. 0 m) should be adopted for the early growth of M. conifera ( within 5 years) , so that M. conifera can grow rapidly and form better morphological characters .