杉木第3代种子园优良家系实生裸根苗早期生长对比分析

Comparative analysis on the early growth of bare root seedlings of excellent families in the third generation seed orchard of Cunninghamia lanceolata

为对比杉木第3代种子园不同家系实生裸根苗造林2年生长状况,2022年3月开展5个不同家系和种子园混合种对照(CK)试验林生长量测定。结果表明:5个家系2年生幼林,JX5和JX2树高生长相对CK分别高出10.5%和3.5%,JX2、JX5和JX1地径生长相对CK分别高出14.6%、9.9%和6.8%。通过聚类分析,可将5个家系和对照(CK)分成3个类群,JX2为A类群,幼林生长较好;JX1和JX5为B类群,幼林生长中等;JX3、JX4和CK为C类群,幼林生长较慢。

In order to compare the growth of bare root seedlings of different families in the third generation seed orchard of Cunninghamia lanceolata for two years,in March 2022,the growth of mixed seed control (CK) experimental forests in five different families and seed orchards was measured.The results showed that:5 families of 2-year-old young forest,JX5and JX2were 10.5%and 3.5%higher than CK.The ground diameter growth of JX2,JX5and JX1was 14.6%,9.9%and 6.8%higher than CK,respectively.Through cluster analysis,the 5 families and CK could be divided into 3 groups,JX2was a group with good growth.JX1and JX5belonged to group B,and the young forest growed moderately.JX3,JX4and CK belonged to group C,and the young forests growed slowly.