文献类型：期刊文献

中文题名：望天树苗木分级技术研究

英文题名：Seedling Grading Technique of Parashorea chinensis

作者：马跃[1] 谌红辉[1] 李武志[1] 刘志龙[1] 王小宁[1] 蒙彩兰[1]

第一作者：马跃

机构：[1]中国林业科学研究院热带林业实验中心

年份：2012

卷号：27

期号：4

起止页码：153-156

中文期刊名：西北林学院学报

外文期刊名：Journal of Northwest Forestry University

收录：CSTPCD;;北大核心:【北大核心2011】；CSCD:【CSCD_E2011_2012】；

基金：中国林科院基本科研业务费专项项目:珍贵热带树种种质资源收集与保存(CAFYBB2011005-8);广西科学研究与技术开发计划项目(桂科攻10100012)

语种：中文

中文关键词：望天树;苗木质量;苗木分级

外文关键词：Parashorea chinensis ; seedling quality; seedling grading

分类号：S723.13

摘要：通过对望天树容器苗质量评价研究,提出了以苗高和地径作为该树种苗木分级的质量指标,采用聚类分析方法分类,结果表明:望天树半年生苗木可分为3级。Ⅰ级苗:苗高>27.5cm,地径>0.4cm;Ⅱ级苗:20.5cm<苗高≤27.5cm,0.3cm<地径≤0.4cm;Ⅲ级苗:苗高≤20.5cm,地径≤0.3cm。
The quality of the container seedling Parashorea chinensis was evaluated by using the method of gradual cluster analysis. Seedling height and basal diameter were proposed as the main indices of quality grading. Seedlings with the height of 27.5 cm or above, basal diameter of 0.4 cm or above were classified as the first grade, those with the height lower than 27.5 cm but higher than or equal to 20.5cm, basal di- ameter lower than 0.4 cm but higher than 0.3 cm were classified as the second grade, those with height lower than 20.5 cm and basal diameter lower than 0.3 cm were classified as the third grade.