杉木良种早期生长性状对比分析  

Comparison of early growth performance of improved varieties of Cunninghamia lanceolata

作　　者：刘传辉 Liu Chuanhui(National Forest Farm of Taining,Taining Fujian 354400,China)

机构地区：[1]福建省泰宁国有林场,福建泰宁354400

出　　处：《南方林业科学》2021年第5期6-10,共5页South China Forestry Science

基　　金：福建省林业科学研究项目“杉木第四代育种及良种高效繁育技术”(闽林科便函〔2016〕35号);福建省林木种苗科技攻关六期项目“杉木第4代育种研究与应用”。

摘　　要：2012年在福建省泰宁县营造杉木不同良种生长对比试验林,分析了良种8年生的树高、胸径和单株立木材积。结果表明:第3代良种8 a林龄时树高、胸径及单株立木材积比第2.5代良种分别高出3.6%、9.1%和23.8%,比人工林混合种(CK)分别高出22.2%、44.8%和148.1%;第3代良种树高及胸径年均生长量最大,分别为1.03 m及1.50 cm,比人工林混合种分别高出22.6%和44.2%;第2.5代良种树高和胸径年均生长量分别为1.00 m和1.38 cm,比人工林混合种分别高出19.0%和32.7%;而第3代良种和第2.5代良种树高和胸径年均生长差异不显著。第3代良种树高、胸径及单株立木材积的变异系数分别为18.74%、25.58%及57.05%,各性状变异系数均显著低于人工林混合种(CK),而第2.5代除树高变异系数显著低于人工林混合种(CK),其余性状变异系数与CK无显著明显差异。试验结果初步表明杉木第3代良种在泰宁地区有较好的生长表现和林分整齐性,为泰宁区域推广应用杉木第3代良种造林提供了依据。In 2012,experimental forest of main cultivars of Cunninghamia lanceolata was carried out in Taining.The DBH(diameter at breast height)and tree height were investigated year after year,and the growth characteristics of difference C.lanceolata cultivars were analyzed base on 8-year-old test plantation.The results showed that:after 8 years of afforestation,the average tree height,DBH and individual volume of 3^(rd) generation cultivar increased by 3.6%,9.1%and 23.8%,respectively,compared with that of 2.5th generation cultivar,and increased by 22.2%,44.8%and 148.1%,respectively,compared with that of the mixed plantation of C.lanceolata(CK).The highest average annual growth rate of tree height and DBH was 1.03 m and 1.50 cm respectively for 3^(rd) generation cultivar,which increased by 22.6%and 44.2%compared with CK,respectively;Followed by 1.00 m and 1.38 cm respectively for 2.5th generation cultivar,which increased by 19.0%and 32.7%compared with CK and no significant from 3^(rd) generation cultivar respectively;and the last was the CK,with an average annual growth of 0.80 m and 1.04 cm.The coefficients of variation of tree height,DBH and individual volume of the 3^(rd) generation cultivar were 18.74%,25.58%and 57.05%,respectively,and each trait were significantly lower than that of CK.Except the coefficients of variation of tree height of 2.5th generation cultivar were significantly lower than that of CK.The variation coefficients of other traits had no significant difference with CK.The experimental results showed that 3^(rd) generation cultivar had better growth benefit,more neat and consistent in Taining area.Further analysis of the growth rule of 3^(rd) generation cultivar provides reference for forestation of C.lanceolata in Taining.

关 键 词：杉木 第3代良种 早期生长表现 

分 类 号：S791.270.4[农业科学—林木遗传育种]