查询词典 quercus

There is a certain correlation among growth characters and geographical climatic factors of Quercus mongolica provenances.

不同蒙古栎种源生长性状、地理、气象因子之间具有一定的相关性。

The natural regeneration of Quercus liaotungensis Koidz.was studied in Dongling Mountain.

在北京东灵山地区对辽东栎的天然更新进行研究。

Fire and human activities increased the domination of oak forests because of their biological features of oak trees. Cutting repeatedly was the main reason for the domination of Quercus mongolica forest in recent 100 years in north and east China. During the succession of ...

火是原生性质蒙古栎林在地质历史时期存在和扩散的根本原因，过度的人类活动是促成现在蒙古栎次生林占优势地位的主要原因，这是由蒙古栎这个树种的生物学特性决定的，在没有外界因素的干扰和火减少的情况下，蒙古栎在演替过程中逐渐被耐荫的树种所取代，但是在中国北方，由于人类活动的加剧，蒙古栎林的优势度有增加的趋势。

The results showed that annual average temperature was the most important factor determining the occurrence of all species except for Quercus mongolica and Populus davidiana.

结果表明，除了山杨和蒙古栎之外，年均温是决定其它树种存在与否的重要因子。

Three nitrogen levels had increased dark respiration of Quercus mongalica seedlings under interaction of double CO2 concentration and elevated temperature.

氮素水平对最大光合速率影响也十分明显，不同处理条件下，高氮水平的最大光合速率明显高于低氮和不施氮水平。

Signi?cantly greater numbers of oviposition sites were found on sugar maple, Acer saccharum Marshall,than on red maple, Acer rubrum L.,green ash, Fraxinus pennsylvanica Marshall,or red oak, Quercus rubra L.,with no significant differences among the other three tree species. Similarly,signi?

在温室条件下，我们在糖枫树上发现的产卵点要明显多于红糖槭、白蜡树、红橡树，而在红糖槭、白蜡树、红橡树这3种树种间则没有显著的差别，同样，在糖槭树上，我们发现的活的幼虫的数量也显著大于其它3个树种上的。

As a very special vegetation type in China, Quercus aquifolioides are widely distributed in the Hengduanshan Mountain area, belonging to a type of the sub-alpine sclerophyllous oak forest.

川滇高山栎广泛分布于横断山地区，属于亚高山硬叶栎林，是中国植被非常特殊的类型。

As a very special vegetation type in China, Quercus aquifolioides, a type of sub-alpine sclerophyllous oak forest, distributes widely in Hengduanshan Mountain in Wolong Natural Reserve.

川滇高山栎广泛分布于横断山地区，属于亚高山硬叶栎林，是中国植被非常特殊的类型。

The cork oak,Quercus suber, of Southern Europe,forms a very thick layer and is the main source of commercial corks.

欧洲南部的欧洲栓皮栎的形成非常厚的一层木栓，并且是主要的商用木栓来源。

Quercus suber ; structure ; physical property

欧洲栓皮栎；构造；物理性质

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。