大花序桉无性系引种试验

Introduction Experiment on Eucalyptus cloeziana Clones

无性系林业是人工用材林发展趋势,开展大花序桉无性系引种试验,旨在为今后优良无性系示范推广提供技术支撑。通过引种4个大花序桉无性系组培苗和1个实生苗(CK)进行对比栽培试验,结果表明:2年生试验林无性系之间的保存率、胸径差异极显著,树高差异显著,冠幅差异不显著。采用隶属函数法对各无性系进行综合评价,初步选出的D4号无性系综合评价得分最高(0.96),比群体得分平均值(0.49)提高了95.9%,幼林生长表现良好,可以引进苗木在生产上造林推广。D3号和D2号无性系综合得分均大于CK,要通过较长时间继续观测,以观后效。

Clonal forestry is the development trend of artificial timber forest,and the clonal introduction experiment on Eucalyptus cloeziana aims to provide technical support for the demonstration and promotion of excellent clones in the future.By introducing four clonal seedlings of Eucalyptus cloeziana and one real seedling(CK),the comparative cultivation experiment was carried out.The results showed that the preservation rate,diameter at breast height and tree height varied significantly among the 2-year-old forest clones,while the difference in crown width was not significant.The affiliate function method was used to comprehensively evaluate each clone,and the preliminarily selected D4 clone had the highest score(0.96),which was 95.9%higher than the average group score(0.49).The growth performance of young forests was good,and the seedlings could be introduced for afforestation in production.The comprehensive scores of D3 and D2 clones are greater than CK,and they should be observed for a long time to test the effect.