摘要
采用逐步聚类分析方法，对云南红豆Ormosla yunnanensls容器苗苗木分级标准进行了初步探讨。以苗高和地径作为分级的品质指标，提出了以下分级标准：Ⅰ级苗为苗高〉15，4cm，地径〉0．29cm，Ⅱ级苗苗高为11．4～15．4cm，地径0．24-O．29cm，Ⅲ级苗为苗高〈11．4cm，地径〈0．24cm。
The standard of container seedling of Ormosia yunnanensis is studied by using the methods of gradual clustering analysis. Seedling height and basal diameter are proposed as the main indexes of quality for seedling classification of the species. The container seedlings are classified into three grades. First grade container seedlings are with the height greater than 15.4 cm, the basal diameter greater than 0.29 cm. Those, the height between 11.4 cm and 15.4 cm, the basal diameter between 0.24 cm and 0.29 cm are classified as second grade. Those, with height lower than 11.4 cm and basal diameter lower than 0.24 cm are sorted into third grade. [ Ch, 5 tab. 5 ref. ]
出处
《浙江林学院学报》
CSCD
北大核心
2006年第6期651-655,共5页
Journal of Zhejiang Forestry College
基金
"十五"云南省科学技术攻关项目(2002NG10)
关键词
森林培育学
云南红豆
容器苗
苗木分级
逐步聚类
silviculture
Ormosia yunnanensis
container seedling
seedling classification
gradual clustering analysis
