摘要
为探明贵州金花茶苗木分级标准,以及为贵州金花茶培育提供理论基础,通过调查贵州省罗甸县国有林场三年生贵州金花茶苗木的苗高(H)和地径(D),采用K-均值聚类分析法及标准差法对苗木质量分级进行对比分析。结果表明,采用标准差法对苗木等级评定的结果为:Ⅰ级苗H≥60.9 cm,D≥8.78 mm;Ⅱ级苗45.7 cm≤H<60.9 cm, 6.40 mm≤D<8.78 mm;Ⅲ级苗H<45.7 cm,D<6.40 mm;Ⅰ、Ⅱ级苗的株数占比为85%。K-均值聚类分析法中苗木分级的结果为:Ⅰ级苗H_Ⅰ≥54.9 cm,D_Ⅰ≥7.26 mm;Ⅱ级苗46.2 cm≤H_Ⅱ<54.9 cm, 6.93 mm≤D_Ⅱ<7.26 mm;Ⅲ级苗H_Ⅲ<46.2 cm,D_Ⅲ<6.93 mm,Ⅰ、Ⅱ级苗的株数占比为76%。
In order to establish the classification standards of Camellia huana seedlings and put forward the theoretical basis for the cultivation of Camellia huana,we investigated seedling height and ground diameter of 3-year-old Camellia huana seedlings in state-owned forest farm in Luodian County,in Guizhou Province.The quality classification of seedlings was analyzed by using the K-mean cluster analysis and standard deviation method.The results showed that the standard deviation analysis was as follows:grade I,H≥60.9 cm and D≥8.78 mm;grade II,45.7 cm≤H<60.9 cm,6.40 mm≤D<8.78 mm;grade III,H<45.7 cm and D<6.40 mm.The proportion of grade I and II seedlings was about 85%.The results of K-mean clustering were as follows:grade I,H,≥54.9 cm,D,≥7.26 mm;grade I,46.2 cm≤Hr<54.9 cm,6.93 mm≤Dμ<7.26 mm;grade II,Hm<46.2 cm,Dm<6.93 mm.Grade I and II seedlings accounted for 6.93%seedlings.
作者
陈永丽
王华
CHEN Yongli;WANG Hua(Forestry Bureau of Luodian County,Qiannan 550100,Guizhou,China;Guizhou Institute of Forest Inventory and Planning,Guiyang 550003,Guizhou,China)
出处
《中南林业调查规划》
2024年第3期59-62,共4页
Central South Forest Inventory and Planning
关键词
苗木分级
贵州金花茶
苗高
地径
K-均值聚类分析法
标准差法
seedling grading
Camellia huana
seedling height
ground diameter
K-mean cluster
standard deviation method
