查询词典 quercus

He taxonomy and distribution of several poisonous plants of Quercus Linn.

itle 栎属有毒植物的分类分布及其对家畜的危害。

The wind velocity and the average water capacity of soil are unremarkable. In the all growing season, the transpiration of Quercus variabilis is 380.46mm, and that of Liquidambar Formosana is 48.42mm.

结果表明影响蒸腾强度的主要生态因子是温度和净辐射；其次是空气相对湿度和土壤热流通量；风速和土壤含水率的影响很小。

The result showed that the biomass of root, stem and leaves of Quercus virginiana were reduced with the increase of salinity and the decline of dry weight of stem and leaves was greater than that of root, which indicated that the aboveground of live oak was more sensitive to salt than the underground which lead to the increase of root-shoot ratio.

结果发现，在经过不同质量质量浓度NaCl处理21d后，随着NaCl质量质量浓度的增加，弗栎植株生长受到抑制，其中茎叶生物量减少的幅度较根系大，表明弗栎地上部生长比地下部对盐胁迫更加敏感，从而导致根冠比增加。

On the basis of pollen analysis of surface sample in North China, polynomial function analysis method was applied to establish pollen climate response surface of Pinus, Betula, Quercus, Artemisia, Chenopodiaceae, Compositae, Picea, Ephedra, Gramineae in North China, therefore an easy and applicable method for reconstructing palaeoclimate and palaeoenvironment with data of fossil pollen was founded; Multi-analysis method was applied to analyse the principal elements of surface sample pollen in central Inner Mongolia Steppe, the assemblages of surface sample pollen in steppe area and its relationship with vegetation type were discussed with helps from spore-pollen analysis of a peat section in Chasuqi, Inner Mongolia and 〓C chronometer, fossil pollen data were obtained with high resolution on the peat section in Chasuqi. Vegetation succession and environmental changes since Holocene at resolution of 70 years were primarily reconstructed in south Mount Daqingshan and Plain Tumete. The changes in the area were copmared with those in the neighbouring areas during the same period. It was found that Holocene environmental change had undergone the following stages: cold-arid, temperate-wet, warm-wet, temperate-arid and cold-arid, and the climatical optimum period occurred in 5000-4100 aB.

本文在对中国北方表土花粉研究的基础上，采用多项式函数回归方法建造了中国北方松属、桦属、栎属、蒿属、藜科、菊科、云杉属、麻黄属、禾本科等的花粉——气候趋势面，从而为利用化石花粉资料直接恢复古气候、古环境提供了一种方便易行的方法；采用多元分析方法对内蒙古中部草原区表土花粉进行了主成分分析，探讨了草原区表土花粉组合的规律及与植被类型的关系；本文还应用孢粉分析方法，结合〓C测年技术，通过内蒙古中部察素齐泥炭剖面高分辨率的化石花粉数据，初步恢复了大青山山地南部及土默特平原地区分辨率为70年的全新世以来植被演替和环境变迁的状况，并与邻近地区的全新世古气候、古环境进行了对比研究，研究发现，本区域全新世古环境的变迁序列基本上可以与周围地区及华北地区进行对比，其环境变迁经历了凉干～温湿～暖湿～温干～凉干的变化，且气候最适宜期出现在5000～4100aB.P。

Non-significant difference was detected in the maximum net photosynthetic rate of leaf in seedlings of Quercus liaotungensis, Fraxinus rhynchophylla and Spiraea pubescens.

5辽东栎和大叶白蜡的最大净光合速率和柔毛绣线菊没有显著差别。

Have to Masson pine, fir, cedar mainly subtropical coniferous forests, and chestnut in silk, camphora, nanmu, eucalyptus, tangelo mainly evergreen broad-leaved forest, there are birch, poplar, Quercus acutissima, serrata tree mainly deciduous broad-leaved forest, there are a camellia, rhododendron, Eurya, mainly cubeba mountain shrub, and to Imperata, mainly of Pakistani mountain fescue grass.

有以马尾松、杉木、柏木为主的亚热带针叶林，有以丝栗、香樟、楠木、桉树、桔柚为主的常绿阔叶林，有以桦木、杨树、麻栎、枹树为主的落叶阔叶林，有以山茶、杜鹃花、柃木、山苍子为主的山地灌丛，有以白茅、巴茅为主的山地草丛。

Some arborous tree species have the highest water utilization efficiency, such as Chinese Pine, Quercus variabilis, Sawtooth oak and Chinese Arborvitae.

在水分充足条件下，供试22个试验树种苗木蒸腾速率、光合速率与水分利用率日变化曲线呈相似的变化趋势。

The comprehensive value of the planted seedlings under forest in the designed scheme in Beijing were assessed by applying VE and VA methods. It was indicated that the value of the seedlings under ecological forests followed the order of Quercus variabilis, Broussonetia kazinoki, Cotinus coggygria, Acer truncatum etc. It was concluded that in the forestry management, comprehensive values should be considered to select seedling species with high values for regeneration under forests.

评价结果认为，在以生态公益林定位的森林经营中，人工林下更新幼苗的综合价值依次是栓皮栎、构树、黄栌、华北五角枫等，所以在林下层苗木的经营选择中应该按照这些树种的综合价值来进行苗木的选择和操作。

The comprehensive value of the planted seedlings under forest in the designed scheme in Beijing were assessed by applying VE and VA methods. It was indicated that the value of the seedlings under ecological forests followed the order of Quercus variabilis, Broussonetia kazinoki, Cotinus coggygria, Acer truncaturn etc. It was concluded that in the forestry management, comprehensive values should be considered to select seedling species with high values for regeneration under forests.

评价结果认为，在以生态公益林定位的森林经营中，人工林下更新幼苗的综合价值依次是栓皮栎、构树、黄栌、华北五角枫等，所以在林下层苗木的经营选择中应该按照这些树种的综合价值来进行苗木的选择和操作。

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。

I can not make it blossom and suits me

我不能让树为我开花

When temperatures are above approximately 80 °C discolouration of the raceways or rolling elements is a frequent feature.

当温度高于 80 °C 左右时，滚道或滚动元件褪色是很常见的特征。