摘要
通过相关分析进行质量指标提取,采用逐步聚类分析方法,对柚木1年生苗木分级标准进行了初步探讨。提出以地径(D)和苗高(H)作为柚木苗木分级的质量指标,得出以下分级标准:Ⅰ级苗:D>2 5cm,H>150cm;Ⅱ级苗:D=2 5～1 5cm,H=150～100cm;Ⅲ级苗:D<1 5cm,H<100cm。
Preliminary discussion on the standards for classification of 1-year nursery stuck of Tectona grandis L. is conducted with the method of gradual cluster analysis and relevant quality index collection. It draws a conclusion using ground diameter (D) and nursery height (H) as quality indexes that standards for classification can be detailed as: Grade I : D > 2.5 cm, H > 150 cm; Grade II: D = 2.5 - 1.5 cm, H = 150 - 100 cm; Grade III: D < 1.5 cm, H < 100 cm.
出处
《林业调查规划》
2004年第4期4-7,共4页
Forest Inventory and Planning
