福建林业科技2025，Vol.52Issue(4)：112-119,8.DOI:10.13428/j.cnki.fjlk.2025.04.016
4个杉木第3代良种早期生长动态分析
Analysis of Early Growth Dynamics of the Third Generation Improved Varieties of Chinese Fir(Cunninghamia lanceolata)
摘要
Abstract
This study compared the growth performance(tree height,breast height diameter,and individual standing timber volume)of four 3rd generation Chinese fir varieties at 5 and 8 years after afforestation.Results showed that the survival rate of all tested varieties exceeded 84% during the 5th～8th year period,maintaining a high and stable level overall.Among them,Weimin 3rd generation a-chieved the highest survival rate(98.92% ),while Youxi 3rd generation had the lowest(84.26% ).Significant differences were ob-served in the three growth traits across varieties:at 8 years,Weimin 3rd generation and Jiangle 3rd generationoutperformed Xipi 3rd generation and Youxi 3rd generation significantly.Their individual standing timber volumes were 30.36% and 59.17% higher than Xipi 3rd generation,and 22.46% and 49.53% higher than Youxi 3rd generation respectively.In terms of phenotypic coefficient of var-iation(CV),Weimin 3rd generation exhibited the lowest CV for all traits(volume CV=56.32% ),whereas Jiangle,Xipi and Youxi 3rd generation had higher CV(74.04%,82.78% and 80.59% for volume,respectively).For growth dynamics,the average annual growth rates of tree height and DBH in the early stage(1st～5th year,V1)were higher than those in the middle stage(5th～8th year,V2),while the volume growth rate in V2 was significantly higher.Overall,Weimin and Jiangle 3rd generation maintained higher annual growth rates than the other two varieties,though the growth disparities in tree height and DBH among these varieties narrowed asthe stand age increased.All varieties remained in a steady growth stage.By comparison,the Weimin 3rd generation superior variety and Jiangle 3rd generation superior variety are more suitable for afforestation and promotion in the Youxi area.The relevant research re-sults have analyzed the growth pattern of the 3rd generation of Chinese fir,providing scientific reference for guiding the application of different 3rd generation Chinese fir varieties in different regions.关键词
杉木/第3代良种/早期生长评价/表型变异系数/年均增长率Key words
Cunninghamia lanceolata/3rd generation cultivar/early growth assessment/coefficient of genetic variation/annual growth rate分类
农业科技引用本文复制引用
王孔桓..4个杉木第3代良种早期生长动态分析[J].福建林业科技,2025,52(4):112-119,8.基金项目
福建省自然科学基金项目(2023J05058) （2023J05058）
福建省林业科学研究项目(闽林科便函[2016]35号) （闽林科便函[2016]35号）
