乔木层

乔木层、木层的物种丰富度、种多样性指数均大于草本层，且差异极显著，群落均匀度差异显著。

The species richness and diversity index of the tree layer and the shrub layer was obviously higher than that of the herb layer , and their evenness had evident difference .

在落叶阔叶林中，典型的栎类林，其丰富度指数的趋势为灌木层>草本层和乔木层，而在草本层与乔木层间是波动的；

In the deciduous broadleaf forest , especially the typical Quercus forest , the trend is shrub > herb and tree , but in the herb layer and the tree layer , the trend fluctuates .

乔木层、灌木层和草本层植物的β多样性（Cody指数）均随着海拔的升高而下降。

β diversity , indicated by the Cody index , declined with increasing altitude for all three layers .

乔木层、灌木层和草本层的物种多样性较低。

All the three layers had low species diversity .

这表明尽管造林时间已经有30年左右，但是人工林下的刺槐幼苗还没有生长成乔木层。

The forest age is about30y , but the Robinia pseudoacacia seedlings have not grown to arbor layer .

碳储量在林分中分配的大小顺序为土壤层乔木层枯落物层灌草层，土壤层和乔木层是林分碳库的主体，乔木层是林分碳汇的主体。

The order of carbon storage distribution in the stand was soil layer tree layer litter layer understory vegetation layer .

乔木层的总生物量随着林龄的增大而增加，乔木层的生物量更多的积累在树干中。

In the arbor layer , the total biomass increased with increasing stand age , and the biomass was more accumulation in the trunk .

群落结构上可分为乔木层、下木层和草本层三个基本层次，以及层间植物，乔木层一般还可分为二个亚层。

The vegetation stratification were divided into : tree layer , undergrowth layer , herbaceous layer and lianas , the tree layer could be divided into two sub-layer .

在常绿落叶阔叶林中，灌木层的丰富度指数与多样性指数相对高于乔木层，乔木层相对高于草本层。

In the evergreen and deciduous mixed forest . the species richness and diversity index in shrub was more than in arbor and those in arbor were more than in herb .

群落垂直结构明显，可分为乔木层、灌木层、草本层，也有部分层间植物，乔木层郁闭度为0.3~0.5，巨柏为乔木层的单一优势种，而群落植物的水平分布不均匀。

The arbor layer had a crown density of 0.3 ~ 0.5 and was dominated by individuals of Cupressus gigantea in the community , and the horizontal structure was not symmetrical .

本文采用标准木回归分析法（乔木层、木质藤本）和样方收获法（灌木层、草本层）研究了西双版纳湿性季节雨林生物量及其分配规律。

The biomass and its allocation of a tropical wet seasonal rain forest in Xishuangbanna were studied based on the standard tree regression analysis ( for trees and lianas ) and clear cut method ( for shrub and herb ) .

自然恢复样地和对照样地的群落α多样性指数大都表现为乔木层灌木层草本层，人工恢复样地群落a多样性指数大都表现为灌木层乔木层草本层或者草本层灌木层乔木层。

Spontaneous recovery plots and control plots of a diversity index most of the tree layer shrub layer herb layer , and Manual restoration of the kind a diversity index most of the performance of the shrub layer tree layer herb layer or herb layer shrub layer tree layer .