伴生树种

Main associated tree species are listed for Loblolly pine plantation in hillock areas of Southern Anhui Province.

为皖南丘岗地区火炬松人工林提出可供选择的主要伴生树种。

In this thesis, research on alleviation of autotoxicity by planting mixture of Chinese fir and Broadleaf trees and developing undergrowth vegetation were also done. The results showed that Michelia macclurei and Cinnamomum camphora had positive allelopathic effect on the growth of Chinese fir saplings and developing undergrowth vegetation improved soil decline of Chinese fir plantation.

另外，论文还从植物化感作用的角度，对克服杉木人工林连栽障碍的其它生产措施，如营造混交林及人促林下植被的发育生长，进行了研究：提出了与杉木化学生态关系良好的两种伴生树种，并从化感作用角度证明人促林下植被发育有利于克服杉木人工林的连栽障碍。

Basing on the investigation on 5 plots of Broussonetia papyrifera population and main associated species naturally revegetabled in mine spoil Nanjing Mufu Mountains, the niche breath and niche overlap of the main species were studied.

中文摘要：以南京幕府山矿区废弃地自然恢复的植被优势种群为对象，对构树及其伴生树种的生态位宽度和生态位重叠进行了研究。

According to the life form of species and their roles in communities, 6 species groups are used to do ordination analysis and environmental interpretation. The result suggests that:①Despite the strong man-made disturbance at lower altitude sites, the number and character of evergreen species show an change along the altitude gradient.②The rare and endangered species concentrated at two sectors along altitude gradient, corresponding to the upper and lower borders of the mountain mixed forest belt of evergreen and deciduous broad-leaved species.③The pioneer tree species concentrated on the middle and upper positions at lower elevation.④The deciduous accompany tree species show a great diversity on middle and lower position at middle and higher elevation.⑤Coniferous species differentiate along elevation and local topographical gradient.⑥Deciduous species in Quercus, Castanea, Fagus, Carpinus genus as well as coniferous species play primary community-constructing roles at different topographical position at Dalaoling region.

根据物种生活型及其在植物群落中的地位，分6个种组进行排序和环境解释，表明：①尽管低海拔地段受到强烈人为干扰，常绿种类仍显示了数量和性质沿海拔梯度的变化；②珍稀物种在海拔梯度上形成两个相对集中的区段，大致对应于山地常绿落叶阔叶混交林带的上下边缘；③先锋树种在中低海拔的中上坡位富集；④在中、高海拔的中低坡位，落叶的乔木伴生种显示了极大的多样性；⑤为数不多的针叶树种在海拔和局部地形梯度上也有明确分异；⑥它们和落叶的栎、栗、水青冈、鹅耳枥属物种在大老岭地区不同地形部位的植被中起着主要的建群作用。

UV spectroscopy was used for determining the amount of total flavonoid,and HPLC was used for determining the amount of juglone.

为胡桃科胡桃属落叶乔木，是东北阔叶红松林的重要伴生树种，也是我国重要的药源植物。

In this study, 22 ground field plots were set up in the leucocephala invasion areas. Important value index and Two-way indicator species analysis were used. According to the levels of invasion of leucocephala that can be divided into three forest types: Vitex negundo-Leucaena leuococephala type, Acacia confuse-Leucaena leuococephala type and Murraya paniculata-Leucaena leuococephala type. The companion plants are Acacia confuse, Vitex negundo, Bridelia monoica, and Melanolepis multiglandulosa.

本研究於银合欢入侵区域，设置22个地面调查样区，利用重要值指数及双向指标种分析，得知银合欢入侵，依入侵程度不同可分为埔姜－银合欢型(vitex negundo-Leucaena leuococephala type)、相思树－银合欢型(Acacia confuse-Leucaena leuococephala type)及七里香－银合欢型(Murraya paoiculata-Leucaena leuococephala type)三型，而主要伴生树种为相思树、埔姜、土密树、虫屎等。

The results showed that the dominant tree species Picea jezoensis and Abies nephrolepis were distributed nearly over the whole transect,and the companion trees and most of shrubs were found in certain fragments respectively.The total number of species of the plot varied slightly,but species composition among the plots varied greatly along with the elevation variation.This trend reflected the high habitat diversity of this forest zone.

研究结果表明主要树种云杉和冷杉在整个暗针叶林带均有分布，而伴生树种和多数灌木出现于一定海拔范围内；沿海拔梯度物种数变化小而物种组成变化大则表明长白山暗针叶林丰富的生境多样性。

Tilia amurensis,one of the mainly associated tree species in natural broad-leavedKorean pine mixtures and broad-leaved species mixtures of Changbai and small Xinganmountain area,is one of the important broad-leaved species for timber production.

紫椴是长白山和小兴安岭山脉阔叶—红松混交林及阔叶混交林的主要伴生树种之一，也是东北林区重要的阔叶用材树种之一。

Researching the plants that were associated with savanna, Packard soon came up with a list of other associated species -- such as thistles, cream gentians, and yellow pimpernels -- that he quickly realized peppered the fringes of his restoration sites.

研究了那些与热带稀树大草原有关的植物之后，帕卡德很快列出其它伴生树种——如，蓟、黄龙胆和紫繁篓——他迅速认识了自己重建地块那些活力十足的点缀植物。

The split between the two groups can hardly be papered over.

这两个团体间的分歧难以掩饰。

This approach not only encourages a greater number of responses, but minimizes the likelihood of stale groupthink.

这种做法不仅鼓励了更多的反应，而且减少跟风的可能性。