杉木品种‘洋020’无性系生长对比分析  

Productivity anlysis of Cunninghamia lanceolata ‘Yang 020’ clone

作　　者：杨全西 Yang Quanxi(State-owned Forest Farm in Gu County,Shaowu Fujian 354000,China)

机构地区：[1]故县国有林场,福建邵武354000

出　　处：《南方林业科学》2022年第6期23-26,44,共5页South China Forestry Science

基　　金：福建省公益类科研院所专项“杉木速生和特异性状材料初步筛选及扦插繁育关键技术”(项目编号:2020R1009003);福建省种业创新与产业化工程林业项目“杉木高世代良种创新与产业化开发”(ZYCX-LY-202101)。

摘　　要：基于福建省邵武故县水北管护站13年生‘洋020’无性系和杉木2代实生苗人工试验林,通过对树高、胸径以及单株材积、红心比率、木材基本密度的调查,对不同杉木良种在试验区内的各坡位上的生长状况进行分析和评价,结果表明:两个品种在中坡位及下坡位的生长量均优于上坡位,但2代实生苗大部分性状在坡间的差异并不显著,而‘洋020’无性系在中坡位生长表现显著优于上坡位。在中坡位,‘洋020’无性系的平均树高可达18.4 m,平均胸径达15.1 cm,单株立木材积为0.2157 m^(3);2代实生苗平均树高为17.1 m,平均胸径为16.5 cm,单株立木材积为0.2158 m^(3)。总体上‘洋020’无性系平均树高较2代实生苗高,2代实生苗平均胸径高于‘洋020’无性系,两者在单株材积、木材基本密度上并无差异。‘洋020’无性系红心比率分布较为集中,主要在20%~30%之间。2代实生苗红心比率分布较为分散,在15%~45%之间均有分布。除了木材基本密度,‘洋020’无性系各主要生长性状变异系数均大幅度低于2代实生苗,表现出更优的林分齐性。Based on the 13-year-old artificial experimental forests of Cunninghamia lanceolata‘Yang 020’clone and the secondary generation cultivar of C. lanceolata seedlings in Shui Bei Management Station of Guxian County, there was investigated the tree height, DBH, individual volume, red heart wood ratio and wood basic density, the growth status of different improved C. lanceolata varieties on each slope position in the experimental area and analyzed and evaluated. The results showed that the growth of the two varieties at the middle slope position and the lower slope position were better than that at the upper slope position. However, there was no significant difference of most characters between slopes of the secandary generation seedlings, and ‘Yang 020’clones showed significantly better growth performance in the middle slope position than in the upper slope position. In the middle slope, the average tree height of ‘Yang 020’clones was 18.4 m, the average DBH was 15.1 cm, and the volume of each tree was 0.2157 m^(3). The average height of the seedlings in the second generation was 17.1 m, the average DBH was 16.5 cm, and the tree volume per plant was 0.2158 m^(3). The average tree height of ‘Yang 020’clones was higher than that of the secondary generation, and the average DBH of the secondary generation clones was larger than that of ‘Yang 020’clones. There was no difference in volume per plant and basic wood density between the two clones. The distribution of red heart ratio of ‘Yang 020’clones was concentrated, mainly between 20% and30%. The red heart ratio of the secondary generation seedlings was distributed in the range of 15% ~45%. Except for the basic wood density, the variation coefficient of the main growth traits of ‘Yang 020’clones was significantly lower than that of the secondary generation seedlings, showing better stand homogeneity.

关 键 词：杉木‘洋020’无性系 不同坡位 生长量分析 材质性状 

分 类 号：S791.270.5[农业科学—林木遗传育种]