CAJ | 학술논문

为了解杉木林分不同发育阶段冠幅因子的变化规律，以及胸径和树高对冠幅因子的影响程度，运用通径分析方法分析了福建将乐林场5种杉木纯林中胸径和树高与冠幅因子之间的关系。结果表明：1）冠幅的增长主要是在中龄到接近成熟这个阶段，冠幅范围主要在0．3～1．8 m；2）杉木林发育不同阶段的冠高率分布在区间0．3～0．9，总平均冠高率为0．50；3）胸径对冠幅具有显著的正向作用，且随着林分的发育，正向作用逐渐增强，树高只在幼龄和过熟阶段对冠幅起正面作用；4）胸径与树高对冠形率均具有显著的负作用，其中，对冠形率起显著作用的主要是树高，这种负作用在近熟林时最小，成熟林时最大。
위료해삼목림분불동발육계단관폭인자적변화규률，이급흉경화수고대관폭인자적영향정도，운용통경분석방법분석료복건장악림장5충삼목순림중흉경화수고여관폭인자지간적관계。결과표명：1）관폭적증장주요시재중령도접근성숙저개계단，관폭범위주요재0．3～1．8 m；2）삼목림발육불동계단적관고솔분포재구간0．3～0．9，총평균관고솔위0．50；3）흉경대관폭구유현저적정향작용，차수착림분적발육，정향작용축점증강，수고지재유령화과숙계단대관폭기정면작용；4）흉경여수고대관형솔균구유현저적부작용，기중，대관형솔기현저작용적주요시수고，저충부작용재근숙림시최소，성숙림시최대。
We studied growth law of crown in different ages, and impact degree between diameter at breast height ( DBH) , tree height and crown by path analysis.Crown width grew mainly from immature to near-mature, and the figure was in 0.3-1.8 m.Crown ratio distributed in 0.3-0.9, and average crown ratio was 0.5.DBH had a significant positive effect to crown with the development of forest stand, and the positive effect was gradually enhanced.Tree height played a positive influence at young forest and over-matures forest.There was a remarkable negative effect between DBH, tree height and crown shape ratio, and the main factor is tree height.The negative effect was minimum in near-mature forest and maximum in mature forest.