特呈岛3种生境条件下白骨壤天然林的生长与树冠特征

文章以广东省湛江特呈岛高潮带、中潮带、低潮带白骨壤纯林为研究对象,调查了其树高、地径、冠长、冠幅以及分枝角度等,揭示了其生长及树冠特征.结果表明:不同潮带间白骨壤冠幅及树冠面积差异不显著(P＞0.05),而树高、地径、冠长及树冠体积均存在显著差异(P＜0.05),中潮带、高潮带与低潮带的树冠体积分别达31.522,15...

Growth Performance and Crown Characteristics of Avicennia marina Natural Forest at Three Sites in Techeng Island

Height, stem diameter, crown length and diameter, and branch angle of Aviccenia Marina were surveyed at three sites such as high-tide belt, mid-tide belt, low-tide belt in Techeng Island Zhanjiang, and their growth performance and crown characteristics were compared. The results showed that there was no significant difference of crown diameter and crown area while significant difference of height, stem diameter, crown length and crown volume among the three sites; the crown volumes of mid-tide belt, high-tide belt, low-tide belt were 31.522m3, 15.794 m3, 14.446 m3, respectively; the crown volume were remarkably correlated with tree height, crown length and crown diameter at all three sites, while significant positive correlation between crown volume and stem diameter was only revealed at mid-tide belt; the frequencies of branch angle accorded with normal distribution, their peak value occurred between 61 and 80 degree for level 1 branches, and between 41 and 60 degree for level 2 branches.