摘要
为评价云南龙竹实生苗质量,以其半年生实生苗为研究对象,以地径、苗高、每丛株数为苗木质量分级指标,采用K均值聚类法及标准差法确定苗木质量等级。结果表明:云南龙竹实生苗苗高、地径与其他生长指标之间均呈极显著正相关(P<0.01),以苗高、地径和每丛株数作为苗木质量等级划分的依据是可行的。经综合评定,确定云南龙竹半年生实生苗质量分级标准为:Ⅰ级苗高度≥37 cm、地径≥3 mm、每丛株数≥4;Ⅱ级苗27≤苗高<37 cm、2≤地径<3 mm、3≤每丛株数<4株;Ⅲ级苗16≤苗高<27 cm、1≤地径<2 mm、2≤每丛株数<3株。研究结果可为云南龙竹苗木等级进一步划分和良种选育提供科学依据。
In order to evaluate the quality of Dendrocalamus yunnanicus seedling,the 0.5-year-old seedlings were selected for determining the quality grade by using the K-means clustering method and standard deviation method,and the ground diameter(D),seedling height(H)and number of seedlings per cluster(N)are used as the seedling quality grading indexes.The results show that there is a significant positive correlation between seedling height,ground diameter and other growth indexes(P<0.01).It is feasible to use seedling height,ground diameter and number of seedlings per cluster as the basis for seedling quality grading.Through comprehensive evaluation,the quality grading standard of 0.5-year-old seedlings of D.yunnanicus is determined as follows:H≥37 cm,D≥3 mm and N≥4 for GradeⅠ;27≤H<37 cm,2≤D<3 mm and 3≤N<4 for GradeⅡ;16≤H<27cm,1≤D<2 mm and 2≤N<3 for GradeⅢ.The results provide science basis for the further classification of seedling grades and the selection of improved varieties of D.yunnanicus.
作者
程琳
李立杰
陈仕昌
黄大勇
Cheng Lin;Li Lijie;Chen Shichang;Huang Dayong(Guangxi Forestry Research Institute,National Forestry and Grassland Administration Key Laboratory on Cultivation of Fast-Growing Timber in Central South China/Guangxi Key Laboratory of Superior Timber Trees Resource Cultivation,Nanning 530002,China)
出处
《世界竹藤通讯》
2023年第1期24-27,共4页
World Bamboo and Rattan
基金
广西林业局林业科技项目“广西第一次林草种质资源普查与收集”(桂林科字[2021]第34号)
广西林业局林业推广项目“大型丛生竹笋用林优质高产技术示范”([2020]GT21号)。
关键词
云南龙竹
种苗质量
分级标准
广西
Dendrocalamus yunnanicus
seedling quality
grading standard
Guangxi Zhuang Autonomous Region
