胡杨

For such a reason, we select the first stay of our trip in Yinchuan city,Ningxia province, where we can learn ancient culture of China and enjoy the trip of desert and diversifolious poplars with DEUTER.

由于多特始创于1898年，历史悠久的原因，我们这次行程的第一站就选择了宁夏的银川，从了解中国古代的历史文化开始，与多特一起走沙漠、胡杨之旅。

The immense Badain Jaran Desert is the 2nd largest desert in China and the 4th largest worldwide. The diversifolious poplars and the ancient Black City Site in Ejin Banner represent the perfect combination of nature and ancient Chinese culture.

巴丹吉林沙漠浩瀚神气，是我国第二大沙漠，世界第四大沙漠；额济纳旗的胡杨和黑城遗址，代表着自然和古代文化结合的标志。

Our country's deserts mainly lie in arid and semiarid areas, mostly with scarce precipitation and lack of water resource, neither natural vegetation with relatively strong drought-resistance capability nor plantation, like diversifolious poplar, dryland willow, shrubby sand willow, saxoul and Hedysarum mongolicum Turcz,etc., can be protected effectively, this leads to desertification area expansion and frequent sand storm, which seriously affect people's work and life.

我国沙漠多处于干旱和半干旱地区，绝大部分地区降水稀少，水资源缺乏，无论是具有较强抗旱能力的天然植被，还是人造林如胡杨、旱柳，灌木类沙柳、梭梭、杨柴等都得不到有效保护，导致沙化面积扩大，沙尘暴发生频繁，给人民群众的生产生活带来严重影响。

Sympegma regelii community, a rangeland desert vegetation, has the highest Shannon-Winner species diversity indices (1.706); the communities of Haloxylon ammodendron and Ephedra przewalskii, which have obvious feature of desert vegetation, are in the middle in species diversity indices (0.875-0.890); the communities of Calligonum mongolicum, Populus euphratica, Tamarix ramosissima and Glycyrrhiza inflata, characterized by desert forest of which saline desert bushes and saline meadows are scattered in the communities, have lowest value of the species diversity indices (0.079-0.495). 3 The structure of desert plant community is dominated by the bush layer. The species diversity indices of bush layer (0.769-1.451) is much higher than that of herb layer (0.193-0.254), and the diversity in herb layer is strongly influenced by bush layer. 4 The species diversity of desert plant communities shows a gradient of change with respect to longitude, latitude and elevation. For example, rangeland plant Sympegma regelii, with a high level of diversity indices (1.706), is in transition to desert plants Haloxylon ammodendronn community (with a low level of diversity indices of 1.379) in a longitude gradient and to saline Tamarix ramosessima community (with a low level of diversity indices of 0.376) in a latitude gradient. Calligonum mongolicum community, with a low level of species diversity (0.819), is in transition to Ephedra przewalskii (with a low level of diversity indices of 0.890) and Haloxylon ammondendron community (with the diversity indices of 0.645) in an elevational gradient.

群落Shannon-Wiener物种多样性水平表现为合头草群落最高(1.706)，具有草原化荒漠植被类型的成分；梭梭群落、膜果麻黄群落居中(0.875~0.890)，荒漠植被类型特征明显；沙拐枣群落、胡杨群落、多枝柽柳群落、胀果甘草群落较低(0.079~0.495)，荒漠林、盐地沙生灌丛及盐化草甸植被均有零星分布。3荒漠植物群落结构层次中，灌木层占居主导地位，群落灌木层物种多样性水平(0.769~1.451)远远大于草本层(0.193~0.254)，且草本层物种多样性受灌木层影响较大。4荒漠植物群落物种多样性分布格局表现为经向、纬向和海拔梯度的变化，经向、纬向变化为物种多样性水平较高的草原化植物合头草群落(1.076)向物种多样性水平较低的荒漠植物梭梭群落(1.379)和盐化植物多枝柽柳群落(0.376)的过渡，海拔梯度则呈现低水平的沙拐枣群落(0.819)到高水平的膜果麻黄群落(0.890)向低水平的梭梭群落(0.645)变化。

The lack of a safe germinant environment is the primary cause for the failure of P. euphratica sexual reproduction.

缺水所导致的种子安全萌发生境的缺失是额济纳胡杨的有性繁殖失败的首要原因。

I like Populus euphratica, which is a symbol of the perseverance of the Chinese nation.

我非常喜欢胡杨，它是中华民族坚韧不拔精神的象征。

This is the three thousand years of Populus euphratica.

这就是胡杨的三千年。

In that vast expanse of desert, the growth of a rare tree species, Populus euphratica called.

在那浩瀚的沙漠中，生长着一种稀有的树种，叫胡杨。

Is an important plant resources. And, the study and conservation of Populus euphratica Oliv.

是干旱荒漠地区非常重要的植物资源，塔里木河流域胡杨的研究和保护是令人关注的问题。

To me, maybe you are that far of a Populus forest, in you, but I only ray of the wind.

于我，你也许是那遥远林间的一棵胡杨，于你，我却只不过一缕轻风。

This one mode pays close attention to network credence foundation of the businessman very much.

这一模式非常关注商人的网络信用基础。

Cell morphology of bacterial ghost of Pasteurella multocida was observed by scanning electron microscopy and inactivation ratio was estimated by CFU analysi.

扫描电镜观察多杀性巴氏杆菌细菌幽灵和菌落形成单位评价遗传灭活率。