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用测树器和年轮解析法 ,测定了广东黑石顶南亚热带常绿阔叶林的立木和幼树的径向生长和高生长。年轮解析法测得立木的年直径生长量在 0 .1～ 0 .5cm之间 ,一些立木的直径生长呈现出生长快的年份 ( 1～ 3a)和生长慢的年份 ( 1～ 3a)交替的节律。测树器测得立木 5a的年平均直径生长量为0 .0 74cm,5年期间测得有 1 7.6%的个体直径为零增长或负增长。立木的年高增长量为 1 0～ 50 cm,高生长高峰期通常在 1 0～ 30年龄。在树木生长的早期 ,高度的生长优于直径的生长 ,而在树木生长的中、后期 ,直径的生长逐渐优于高度的生长。用游标卡尺和卷尺测得幼树 (通常 1～ 3m高 )的直径和高度 5a的平均生长量分别为 0 .1 0 7cm和 4.76cm。 5a间没有幼树的直径生长为零增长或负增长 ,但约有 9%的个体的高度生长为零增长或负增长。
The tree growth and height growth of standing tree and young tree in the evergreen broad-leaved evergreen forest in Heishiding, Guangdong Province were measured by tree-truncation and annual growth analysis. The annual diameter growth of standing wood was measured in the range of 0. 1 ~ 0. 5cm measured by the annual ring analysis method. The diameter growth of some standing woods alternated between the fast growing (1 ~ 3a) and the slow growing (1 ~ 3a) Rhythm. The tree trunking measured a mean annual diameter growth of 0.58 cm for standing tree 5a, with 7.6% of individuals measuring zero or negative growth over a five-year period. The annual growth rate of standing trees is 10 ~ 50 cm, and the peak of high growth is usually between 10 and 30 years old. In the early stages of tree growth, height growth is superior to diameter growth, whereas in the middle and late stages of tree growth, diameter growth is progressively better than height growth. The average growth of saplings (usually 1 ~ 3m in height) measured by vernier caliper and tape measure was 5101cm and 4.76cm, respectively. No sapling diameter growth was zero or negative within 5 years, but about 9% of individuals grew to zero or negative growth.