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Position: Home > Articles > Study on Wind-resistance of Young Eucalypt Plantation at Different Stand Density Eucalypt Science & Technology 2009,26 (2) 21-26

不同林分密度桉树幼林抗风性比较研究

作  者:
张华林;谢耀坚;李天会;吴志华
单  位:
国家林业局桉树研究开发中心
关键词:
桉树无性系;林分密度;生长量;根系;抗风性
摘  要:
通过对两种1年生桉树无性系(巨细桉DH201-2与尾巨桉DH32-29)6种林分密度(1250株.hm-2、1667株.hm-2、2500株.hm-2、5000株.hm-2、6667株.hm-2、10000株.hm-2)进行生长量、根系和风害的调查,并分析林分密度、生长量和根系与抗风性相关性,结果表明:DH201-2以林分密度1667株.hm-2的生长量最大,而DH32-29胸径和冠幅以1667株.hm-2最大、树高以5000株.hm-2的最高;两个无性系间各个密度生长量差异显著;DH201-2以密度2500株.hm-2的抗风性最好,DH32-296个密度的抗风性均较差;相同林分密度下DH201-2根总数与根直径在0~2cm的根数显著比DH32-29多,DH32-29冠幅显著比DH201-2大,因此DH201-2易断干,而DH32-29易倒伏;相同林分密度下DH201-2比DH32-29抗风性强。
译  名:
Study on Wind-resistance of Young Eucalypt Plantation at Different Stand Density
作  者:
ZHANG Hua-lin,XIE Yao-jian,LI Tian-hui,WU Zhi-hua(China Eucalypt Research Centre,Zhanjiang 524022,Guangdong,China)
关键词:
eucalyptus clone;stand density;growth;root;wind-resistance
摘  要:
Growth,root and wind damage of two one-year-old eucalyptus clones(Eucalyptus grandis×E.tereticornis clone DH201-2 and E.urophylla×E.grandis clone DH32-29) were studied in six stand densities(1250,1667,2500,5000,6667 and 10000 trees·hm-2),and correlation analysis stand density,growth,root and wind resistance was carried out.The results showed that DH201-2 had the maximum growth at density of 1667 trees·hm-2,diameter at breast height and crown of DH32-29 were the best at density of 1667 trees·hm-2 while the tree height was the highest at density of 5000 trees·hm-2.Growth of two clones at various densities were significantly different;2500 trees·hm-2 was the best density on wind-resistance for DH201-2,whilst DH32-29 of six densities all were not ideal;In the same density,the total root number and the root number from 0 to 2 cm of DH201-2 were more than that of DH32-29,but the crown of DH32-29 was larger than that of DH201-2,so DH201-2 was broken and DH3229 was lodged easily;DH201-2 was better than DH32-29 on wind-resistance in the same density.

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