arborous

At the beginning of the late Early Pleistocene, pollen of arborous plants was rapidly reduced and even all disappeared, and pollen of herbaceous plants increased significantly.

进入早更新世晚期初，乔木植物花粉迅速减少乃至全部消失，草本植物花粉大幅度增加。

The result of factor analysis shows: the relatedness exists between structure factors of plant community, four factors contain 85% of information content: canopy, average high of arborous layer, density of arborous layer and underbrush character.

因子分析表明群落结构各因子间存在着相关性，其信息量的82.5%集中在四个主因子上，即：冠盖因子、乔木层高、灌木层性状及乔木层密度因子。

The diversity dynamics of arborous species of different layer during the 28 years restoration period have complexity.

林分不同层内乔木树种的多样性变化动态较复杂。

Species distributed evenly and Richness of species was great when the density closure of broadleaved stands was 0.6~( 0.7) and density closure of needle-leaved stands was 0.7~ 0.8, plants of arborous, shrub, and herbal layers grew well.

阔叶林在郁闭度0.6～0.7，针叶林在0.7～0.8时各物种分布均匀，物种丰富度较大，乔、灌、草各层生长状况良好。

Among them the arborous layer is 956.25g/ m~ 2 · a; the grass layer and naturally seedlings are 161.10g/ m~ 2 · a;

其中乔木层为956.26g/m~2·a，草本及天然幼苗为161.10g/m~2·a。

Russian nature conservation region consists of following protected units: national nature reserve, national and local hunting preserves, national park, nature park, nature remnant, arboretum, arborous park, sanatorium, medical treatment and health care sites.

俄罗斯特别自然保护区域包括国家级自然保护区、全国和地方性的国家自然禁猎区、国家公园、自然公园、自然遗迹地、植物园、树木公园、疗养院、医疗保健地等特别自然保护区域。

Intermediate cutting can not improve the biomass of arborous layer on unit area in a short period.

短期内，间伐不能够提高林分乔木层单位面积的生物量。

The community can be structurally divided into arborous layer, shrub layer and herbaceous layer.

群落可分为乔木层、灌木层、草本层和层间层。

Pteroceltis tatarinowii, one of dominant species of arborous layer had important value ( 66%).

青檀是乔木层优势树种之一，其重要值达66%。