摘要
采用逐步聚类分析方法,对火力楠1年生实生苗的分级标准进行探讨。提出以苗高和地径作为该树种苗木分级的质量指标,并得出火力楠苗木的3级分级标准,即:Ⅰ级苗:苗高≥64 cm,地径≥0.90 cm、Ⅱ级苗:63 cm≥苗高≥61 cm,0.89 cm≥地径≥0.72 cm、Ⅲ级苗:苗高<61 cm,地径<0.72 cm。
With the method of cluster analysis, classification standard of 1-year-old seedlings Michelia macclurei was discussed. The seedling height and ground diameter were made as the index of seedling quality classification, and the seedling classification standard with three grade, that is, grade Ⅰ ： seedling height ≥64 cm, ground diameter ≥ 0.90 cm;grade Ⅱ： seedling height 61 cm^63 cm, ground diameter 0.72 cm^0.89 cm, and grade Ⅲ： seedling height 61 cm, ground diameter 0.72 cm.
出处
《南方林业科学》
2016年第1期27-30,48,共5页
South China Forestry Science
基金
江西省赣州市科技项目"赣南退耕还林树种苗木质量地方标准制定"(项目编号200304)
关键词
火力楠
苗木分级
聚类分析
Michelia macclurei
seedling quality classification
cluster analysis
