摘要
运用随机区组设计试验方法,连续观察育苗期和造林初期林木的生长情况,探讨了两个桉树无性系(巨尾桉无性系广林9号、尾巨桉无性系DH32-29以下简称无性系广9、无性系29)接种固氮菌的效应,结果表明:两种桉树无性系接种固氮菌增长效果显著。苗期试验,无性系广9及29接种后,地径分别比对照增长7.72%、20.18%,苗高增长量分别达5.02%、16.40%;造林7月龄时,接种固氮菌的的广9无性系及29无性系的地径生长量相对于对照组增长分别达35.93%、56.20%,树高增长量分别达35.74%、72.22%。统计分析结果表明:广9及29无性系接种固氮菌增长量均达显著水平,增长效果明显;其中以29无性系接种固氮菌效果较优。此外,接种固氮菌的林木还表现出一定的环境抗逆性,在遭受桉树枝瘿姬小蜂严重危害后能较快恢复生长。
To probe into the effect of inoculating nitrogen fixation bacteria for two Eucalyptus clones（Eucalyptus grandis×E.urophylla GL9、E.urophylla×E.grandis 3229）,was carried out by using the continuous observation on the seedling stage and early stage of the two dones.The results show that compared with the control,there＇s a remarkable effect of growth on the two Eucalyptus clones inoculated with nitrogen fixation bacteria.During the seedling experiment,compared with the control,the basal diameters of Eucalyptus grandis×E.urophylla GL9 increased by 7.72%,the height growth increased by 5.02%;and the basal diameter of E.urophylla×E.grandis 3229 inoculated with nitrogen fixation bacteria increased by 20.18%,the height growth increased by 16.40%.After seven months of the afforestation experiment,compared to the control,the basal diameters of increased Eucalyptus grandis×E.urophylla GL9 by 35.93%,the height growth by 35.74%;and the basal diameter of E.urophylla×E.grandis 3229 inoculated with nitrogen fixation bacteria increased by 56.20%,the height growth increased by 72.22%.The statistical analysis indicates that the two Eucalyptus clones inoculated with nitrogen fixation bacteria not only reached a significant level of growth in the basal diameters but also obviourly grew in the height,the effect of growth-promoting.Of which E.urophylla×E.grandis 3229 displayed a better growth-promoting effect of inoculating with nitrogen fixation.In addition,the two Eucalyptus clones inoculated with nitrogen-fixing bacteria also showed high resistance in the environment,the trees can resume rapid growth after suffering from the serious damage of Leptocybe invasa Fisher et La Salle.
出处
《中南林业科技大学学报》
CAS
CSCD
北大核心
2010年第12期50-55,87,共7页
Journal of Central South University of Forestry & Technology
基金
广西科学基金项目(桂科自0832046)
关键词
桉树
无性系
固氮菌
试验效果
接种
造林
Eucalyptus
clone
nitrogen-fixing bacteria
test effect
inoculation
afforestation
