杉木人工林树冠特征与生长形质的动态关系
Dynamic Relationship Between Canopy Characteristics and Growth Form Quality of Cunninghamia lanceolata Plantation
李梦仙 1晏媛 1黄飞 1曾曙才 1华炜文 2贾小容1
作者信息
- 1. 华南农业大学林学与风景园林学院,广东 广州 510642
- 2. 广东省岭南院勘察设计有限公司,广东 广州 510599
- 折叠
摘要
为探究树冠形态因子对生长形质因子的影响,以明确大径级杉木Cunninghamia lanceolata人工林培育过程的树冠调控的重点与方向,文章选取粤北地区 4 个年龄序列(8、20、37、50 a)的杉木林样地,结合相关性分析和通径分析方法,研究杉木在不同生长阶段中树冠形态因子对生长形质的影响规律.结果表明,杉木树冠形态因子与生长形质因子间大体表现为极显著相关(P<0.01).总体而言,冠幅对生长形质的正向作用随林龄增加而减弱;冠形率对生长形质的正向作用随林龄增加而减弱;冠长率对生长形质的负向作用较小.研究结果反映出,为获得良好生长形质,可使杉木保持冠幅宽大、冠形率大、冠长率小的树冠形态;但在不同林龄阶段冠形调控的效果不同,幼林的树冠调控效果相对更好.
Abstract
To investigate the influence of canopy morphology factors on growth shape and quality factors,the focus and direction of canopy regulation in the cultivation process of large-diameter Cunninghamia lanceolata plantation were clarified.In this paper,C.lanceolata forest plots with four age sequences of 8,20,37,and 50 years old in northern Guangdong were selected.Combined with correlation analysis and path analysis,the effects of canopy morphology factors on growth form quality of C.lanceolata at different growth stages were studied.The results showed that there was a significant correlation between canopy morphology factors and growth shape and quality factors of C.lanceolata(P<0.01).Overall,canopy width had a positive effect on growth shape and quality,but the positive effect was weakened with the increase in forest age.The canopy shape rate had a positive effect on growth shape and quality,but the positive effect was weakened by the in-crease in forest age.The negative effect of the canopy length rate on growth shape and quality was small.This indicates that in order to achieve the purpose of obtaining good growth shape and quality,C.lanceolata can be maintained in a canopy form with a wide canopy width,large canopy shape rate and small canopy length rate.However,the effectiveness of canopy shape control varies at different age stages,and relatively speaking,can-opy shape control was more effective in young forests.
关键词
杉木/冠形/林冠因子/通径分析Key words
Cunninghamia lanceolata/canopy shape/canopy factors/path analysis引用本文复制引用
出版年
2024
NETL
NSTL
万方数据