树种

Sorbus pohuashanensis is the rarely tree that it has important economical and ecologicalvalue in the north forest district of China. Through research on characteristic of physiologicalecology of and seedling, the theory groundwork were established for that to estimate itsadaptive and the quantity in the stage of seedling.

花楸是分布在我国北方林区的具有重要经济价值和生态价值的珍贵树种，本研究通过对不同种源花楸的种子和苗木生理生态特性的研究，为评价花楸在种苗阶段的适应性和优劣程度、进一步筛选出优良种源奠定理论基础。

Of profound respect. On the eastern hill slope, there is a 37-meter-high steel framed watchtower, on its top, you can have a birds'-eye view of the forest sea, and connected hills, the pleasant panoramic view and the soughing of the wind in the pines make you feel relaxed and joyful.

保护区森林复被率95%以上，区内林木类型繁多，种类丰富，尤以天然红松树种比重居多。

Forestry elements(tree species, standage,afforestation density etc), ecological elements (hillside direction, hillside seat, soil type etc) and meteorological elements (temperature,humidity, precipition etc) were the leading factors by the correlation analysis of qualitative and quantitative factors of epidemiology of spore dispersing and disease state observation.

通过对病菌孢子飞散规律和病情调查的定性因子和定量因子进行相关的分析结果，已明确了林分因子(树种、林龄、造林密度等)、生态因子和气象因子交互作用是樟子松枯梢病流行的主导因素。

Forestry elements(tree species, standage,afforestation density etc), ecological elements (hillside direction, hillside seat, soil type etc) and meteorological elements (temperature,humidity, precipition etc) were the leading factors...

通过对病菌孢子飞散规律和病情调查的定性因子和定量因子进行相关的分析结果，已明确了林分因子(树种、林龄、造林密度等)、生态因子和气象因子交互作用是樟子松枯梢病流行的主导因素。

Occurring in yellow, golden and brown colors, Baltic Amber is also known as Succinite after its parent tree pinus succinfera that was common in the tertiary period, some 50 million years ago.

波罗的海琥珀呈金黄和褐黄色，也就是通常人们说的琥珀色。她的母本树种是5千万年前第三纪常见的松科琥珀林。

Two and half years after planting, Swietenia mahagoni and Betula alnoides formed the mixed stand structure, Betula alnoides and Swietenia mahagoni occupied the upper and lower layer respectively.

在幼林前期，两树种已经初步形成西南桦居上层、桃花心木居二层的复层结构。

The highest spore density (7.32) was found in the soils of Swietenia macrophylla, while soils from the rhizosphere of Machilus namu were highest in species richness (5.37) and diversity index (1.6548) of AM fungi.

在所调查的10种热带常见树种中，Swietenia macrophylla根际AM真菌的孢子最丰富，密度高达7.32；Machilus namu根际的AM真菌种类则最为丰富，多样性指数达到1.6548。

The plants of the family Tamaricaceae, a family with long history, have occurred in ancient Mediterranean region since Tertiary. Most of them are drought-telerant plants, which are suitable to be used as wind-preventing, forest-making and soil-holding plants. Ecologically, they are plants of great importance in reforming of desert and improving of climate condition in arid zone.

柽柳科是一个古老的科，起源于第三纪，包括亚洲中部的内的&古地中海&沿岸地区，该科植物主要为旱生植物，其中大多数种是防风、固沙造林和水土保持的优良树种，对改造沙漠和改善气候条件具有重要的生态意义。

In this paper genetic diversity and differentiation of 3 natural populations of Tamarix chinensis, one of the main predominated tree species in Yellow River Delta, were studied using random amplified polymorphic DNA techniques.

采用随机扩增多态DNA分子标记技术，分析了黄河三角洲主要优势树种之一柽柳3个天然群体的遗传多样性及遗传分化。

The invention relates to a new strain producing taxol and a taxol preparation method. The taxol is a diterpenoid alkaloid drug which is extracted from taxaceae plants and has a plurality of anti-tumor effects. Taxus, also known as yew, is a prehistoric plant with a history of 0.2 billion years and is a rare plant species with low growing speed; the biological characteristics of the taxus have high demand on the ecological environment; the natural renewal ability is poor, so the amount of the species is very limited, belonging to an endangered protection plant with limited resource, thus, scientists at home and abroad actively research and develop new taxol sources. The new strain for producing the taxol of the invention is the strain which is first separated from the bark of T.cuspidate Sieb.

产紫杉醇的新菌种及其选育和制备紫杉醇的方法，紫杉醇是从红豆杉属植物中提取出来的具有多种抗肿瘤疗效的二萜生物碱类药物，由于红豆杉，又名紫杉，是两亿年前的史前植物，是珍稀树种，生长速度缓慢，并且其生物学特性对生态环境要求较高，天然更新能力差，所以种群数量极为有限，属濒危保护植物，资源十分有限，因此，国内外学者都在积极地研究开发紫杉醇的新药源，本发明产紫杉醇的新菌种，所述的新菌种为从东北红豆杉T.cuspidate Sieb。

It has been put forward that there exists single Ball point and double Ball points on the symmetrical connecting-rod curves of equilateral mechanisms.

从鲍尔点的形成原理出发，分析对称连杆曲线上鲍尔点的产生条件，提出等边机构的对称连杆曲线上有单鲍尔点和双鲍尔点。

The factory affiliated to the Group primarily manufactures multiple-purpose pincers, baking kits, knives, scissors, kitchenware, gardening tools and beauty care kits as well as other hardware tools, the annual production value of which reaches US$ 30 million dollars.

集团所属工厂主要生产多用钳、烤具、刀具、剪刀、厨具、花园工具、美容套等五金产品，年生产总值3000万美元，产品价廉物美、选料上乘、质量保证，深受国内外客户的青睐