油松生长性状早晚期相关性分析

Correlation Analysis of Growth Shape of Pinus tabulaeformis in Early and Late Stages

油松(Pinus tabulaeformis)生长快,适应性强,抗寒,材质好,是我国北方主要的针叶造林树种。为了缩短育种年限,提高选择效率,该文以河北省围场县31a生的油松为材料,调查不同林龄的树高、基径数据,进行油松的早晚期相关性分析。根据油松各林龄的树高、基径的变异系数,结合对树高、基径进行的相关系数分析,得出最佳选择指标,并进一步确定早期选择效率。结果表明:油松生长性状的早晚期相关性显著,同时确定早期选择年限为13a,根据相关信息量确定早期选择的最佳指标为树高,13a生时的选择效率为31a生的1.18倍。这为油松早期预测提供了理论依据。

Chinese pine is a main conifer species in northern China,which is fast growth,strong adaptability,cold resistance and good material.In order to shorten the breeding period and improve the selection efficiency,Pinus tabulaeformis,aged 4-31 in Weichang County of Hebei Province,were used as the experimental material to study.The tree height and basal diameter of different ages were investigated,and the correlation analysis of the early and late period of Pinus tabulaeformis was conducted in three cases.Variation coefficients were calculated according to tree height and basal diameter of different ages,and combined correlation between tree height and basal diameters,the optimum selection trait was selected.Then the early selection efficiency was confirmed.The results showed that the correlation of tree height and basal diameter between early and late period were significant,and the early selection age was 13 years old.With the correlation information,the optimal trait for early selection was tree height,and the early selection efficiency was 1.18 at the age of 13 compared with at the age of 31.This provided a theoretical basis for early prediction for Pinus tabulaeformis.