结果表明：乔木树种的水分利用效率远比草本和灌木树种低。
The results show that the water use efficiency of arbor is lower than one of herb and shrub.
毛竹群落内混交乔木树种的种类、数量和分布均匀程度对毛竹产量影响显著。
The variety, quantity and distribution of trees mixed in bamboo communities significantly impact the bamboo production.
在干旱瘠薄山地，灌木保持水土、涵养水源、改善生态环境等方面具有乔木树种不可代替的作用。
In the arid and poor mountain lands, shrubs are used to conserve soil, water and headwater and to improve ecological environment, which can not be replaced by any tree species.
该表推荐出适宜在本区推广应用的乔木树种22个、灌木种4个、林种4个，建议试验树种10个。
There are 22 arbor species, 4 scrub species, 4 forest-types and 10 suggested experimental species that are good for popularization and application in the region.
灌木层中乔木树种和阳性乔灌木种类比例、相对密度和重要值均随坡位梯度从下部到上部逐渐增大。
Percentage, relative density and importance values of tree species and intolerant tree and shrub species increased while slope gradient from lower to upper.
通过对废弃采石场以及裸岩山地自然植被的调查，结果表明，宁波市石宕及裸岩的主要有乔木树种有20种，灌木树种30种，草本11种，层外植物6种。
Investigation on natural vegetation at open pit and bare rock in Shitang, Ningbo demonstrated that there are 20 tree species, 30 shrub species, 11 herb species and 6 extrasturatum plants.
紫叶矮樱属蔷薇科李属落叶灌木或小乔木，为世界著名的紫叶树种。
Prunus cistena is a world famous purple tree species, which belongs to Prunus of Rosaceae .
栎类次生林乔木的密度随高度级、径级的增加而递减，但树种丰富度却不随树木的密度增加而增加。
Tree density in the forest decreased with the increases of height class and diameter class, whereas species abundance did not increase.
而树种实有植株径阶分布状况，则通过抽样调查、统计分析得到样本径阶分布规律，再将该规律扩展到北京城区乔木实有植株。
Distribution rule of the arbor in different diametric class was investigated by sampling survey and statistical analysis, then expanded to the whole area in Beijing.
青岛市树种资源的调查与选择结果：青岛市城市森林营建常用植物约400余种，其中乔木200余种、灌木139种、地被34种、竹类3种。
Tree species resources of Qingdao city consists of 400 plant species, including 200 species of arbor, 139 species of bush, 34 species of ground cover and 3 species of bamboo.
骨干树种中有常绿树种3种（乔木1种）、落叶乔木24种、落叶灌木14种，属于乡土树种的14种，外引树种占其3/4。
Among the 41 ones there are 3 evergreen species, 24 broad leave tree species, 14 shrubs; 14 of them from local species, 3/4 from outside areas.
骨干树种中有常绿树种3种（乔木1种）、落叶乔木24种、落叶灌木14种，属于乡土树种的14种，外引树种占其3/4。
Among the 41 ones there are 3 evergreen species, 24 broad leave tree species, 14 shrubs; 14 of them from local species, 3/4 from outside areas.
应用推荐