尾巨桉不同无性系造林对比试验

Contrast Experiments of Afforestation of Different Clones of Eucalyptus urophylla

为丰富尾巨桉优良无性系造林,提高桉树速生丰产林的稳定性和安全性,开展了7个尾巨桉无性系造林对比试验,4年生时对其生长和抗性性进行了状调查分析。结果表明:无性系群体保存率达93.3%,各无性系间差异不显著;各无性系胸径、树高、单株立木材积的差异达极显著或显著水平;抗风能力和耐寒能力比对照强的无性系为D3、D5、D2、D4号,高于群体平均值的无性系为D3、D5、D2号。通过隶属函数法综合评价,选出无性系D3、D5为优良无性系,他们具有生长快,保存率高,抗逆性强等特点,可以适度推广应用。

In order to enrich the afforestation of excellent clones of Eucalyptus grandis and improve the stability and safety of fast-blooming Eucalyptus forests,a comparative test of afforestation of seven clones of Eucalyptus spp.was conducted,and the growth and resistance traits of four years old were investigated.Result shows that the population preservation rate of clones reach 93.3%,and the differences among the clones are not significant;the differences in DBH,tree height&wood volume per plant reach extremely or significant levels;wind resistance&cold tolerance are higher than CK Strong clones is D3,D5,D2,D4,respectively and clones stronger than the population average is D3,D5,D2,respectively.Using the membership function method to evaluate comprehensively,two clones(D3&D5)are selected as excellent clones.They have the characteristics of fast growth,high preservation rate,and strong stress resistance,and can be moderately promoted in production.