查询词典 Ulmus

The Ulmus pumila had strong adaptive ability to the environment, which could grow well under the poor soil.

白榆适应性较强，在瘠薄环境下也能生长，光照不足或过于潮湿的环境不利于白榆的天然下种更新。

It is positive to improving and increasing beautify Harbin landscape. It supply directive advices to manufacture of the Ulmus pwnila to avoid the blindness of manufacture and application.

正确对待和重视乡土树种在园林中的作用，对于提高哈尔滨市的绿化质量和绿化效益有着非常积极的意义；同时也可为榆树的生产提出指导性意见，避免生产和应用的盲目性。

Temperate Ulmus pumila sparse forest grassland ecosystem in Inner Mongolia Plateau is a special ecosystem in China, and even in the world. Its study is of significance in deeply understanding the vegetation distribution patterns in the earth, and favoring the protection of this ecosystem.

内蒙古高原分布的温带榆树稀树草原生态系统在中国乃至世界上都是一种特殊的生态系统，对于它的研究可加深对植被分布规律的理解，且有利于该系统的保护。

A new variety of Ulmus pumila L.

白榆一新变种。

Ulmus pumila open forest s have extensive distribution in the Otindag Sandy Land, which are important for lightening sandstorm.

榆树是浑善达克沙地的优势种，榆树疏林在浑善达克沙地成缀块状分布，对于该区域生态系统的整体性和多样性维持以及防风固沙等方面具有重要意义。

Ulmus davidiana hybrid highlighted a number of advantages.

杂交大果榛子有多种突出优点。

The callus of Ulmus thomasii was induced to form by using the tip bud, young stem and young leaf as explants.

以顶芽、嫩茎、叶片为外植体，对美国岩榆进行组织培养的初步研究。

Third, Garden District: Park contains more than 150 kinds of species from around the Wu rare tree species, mainly in lacquer, split trees, Ulmus macrocarpa, 6 wood, Liu ghost of Festival.

三、植物园区：园内载种了150多种来自武安各地的稀有树种，主要有漆树、捌树、大果榆、六道木，鬼柳、对节等。

The effect of humic acid with the concentration of 850mg/L on improving the drought-resistance of Populus alba x Populus breolinensis seedlings was very obvious, and favorable regulative effects of humic acid with the concentrations of 850 and 650 mg/L on Ulmus pumila seedlings were also observed, but the effect of humic acid on Betula platyphylla seedlings was not distinct.

浓度为850 mg／L的黄腐酸对提高银中杨苗木抗旱性效果明显，浓度为850 mg／L和650mg／L的黄腐酸对白榆苗木抗旱性均有良好的调节作用，黄腐酸对白桦苗木抗旱性的调节作用不明显。

In order to investigate the adaptability mechanism of Ulmus pumila in saline environment distribution characteristics of potassium, sodium, and calcium ions in new leaves, old leaves, new branches and root regetative, of U. pumila under high, low and non-salinity soil were studied.

为了探明白榆适应盐碱环境的机理，以高盐、中低盐、非盐碱3个土壤盐分立地条件下生长的白榆为试验材料，研究不同盐分浓度下新叶、老叶、新枝、老枝和根5个营养器官中4种金属盐离子分布特征。

On the other hand, the more important thing is because the urban housing is a kind of heterogeneity products.

另一方面，更重要的是由于城市住房是一种异质性产品。

Climate histogram is the fall that collects place measure calm value, cent serves as cross axle for a few equal interval, the area that the frequency that the value appears according to place is accumulated and becomes will be determined inside each interval, discharge the graph that rise with post, also be called histogram.

气候直方图是将所收集的降水量测定值，分为几个相等的区间作为横轴，并将各区间内所测定值依所出现的次数累积而成的面积，用柱子排起来的图形，也叫做柱状图。