摘要
以鄄城县国有第一林场7个8年生美洲黑杨无性系(丹红、桑迪、NL351、中菏1号、239、W07、T26)试验林为研究对象,以欧美杨I-107为对照,通过每木检尺、树干解析,研究其生长动态及树高、胸径、材积、形数、冠幅、分枝角度、冠长率、根冠比等生长指标的差异性,并对8个无性系进行聚类分析。结果表明:8个无性系间树高、胸径、材积、分枝角度、根冠比差异显著;形数、冠幅、冠长率差异不显著。从生长动态看,丹红、桑迪生长量大,生长高峰出现早,且持续时间长,生长优于其余无性系;NL351、239生长变化规律与丹红、桑迪相似,但生长量小于前者;中菏1号、I-107、W07、T26整体生长量较低,生长高峰出现较晚。从聚类分析看,第8年树高、胸径、材积生长量相近的无性系归为一类,共分3类,生长量低(I-107、中菏1号、W07、T26)、生长量中等(NL351、239)和生长量高(桑迪、丹红)。
The growth indexes such as growth dynamics, tree height, DBH, volume, stem form-factor, crown di-ameter, branching angle, crown-length ratio and root-shoot ratio of 7 clones of 8-year-old Populus deltoids （ Dan Hong, Sang Di, NL351, Zhong He 1, 239, W07, T26） in State-owned forest farm of Juancheng County, with P. ＆#215; euramericana I-107 as control, were investigated by way of the wood seized feet and the stem analysis. The cluster analysis were per-formed in the 8 clones The result showed that height, DBH, volume, root-shoot ratio, branching angle had significant difference among different clones, height, DBH, volume growth of the difference of stem form-factor, crown diameter, crown-length ratio was not significant. The growth of Dan Hong and Sang Di was larger than the others, and the growth peak appeared early and lasted for a long time. The growth and change rule of NL351 and 239 were similar to Dan Hong and Sang Di, but the growth was smaller than that of the former. The overall growth of Zhong He 1, I-107, W07 and T26 was relatively low, and the growth peak appeared late. The eighth year clones with similar tree height, DBH and volume growth should be classified as a class from the results of cluster analysis. It was divided into 3 categories, low growth （ I-107, Zhong He 1, W07, T26） , medium growth （ NL351, 239） , high growth （ Sang Di, Dan Hong） .
出处
《西南林业大学学报（自然科学）》
CAS
北大核心
2016年第6期34-40,共7页
Journal of Southwest Forestry University：Natural Sciences
基金
国家林业公益性行业科研专项(201404107)资助
山东省重点研发计划(2015GNC111026)项目资助
山东省良种工程重大项目资助
关键词
黑杨派
无性系
试验林
生长性状
聚类分析
Section Aigeiros
clone
test plantation
growth character
cluster analysis
