荒漠

The contribution of soil microbiotic crusts to the diversity of insect species may be attributed to the facts that it stabilizes soil surface, improves soil environmental and there by provides suitable habitats and some food sources for the insects.

生物土壤结皮对荒漠昆虫多样性的贡献可能是由于稳定了土表、改善了植被系统中的土壤环境，为昆虫，特别是幼虫阶段提供相对适宜的土壤生境或部分食物来源。

However,the soil moisture content at soil depths of 45 cm and 60 cm in the areas with microbiotic crusts is much lower than that in the areas without microbiotic crusts(LSD-test,p.05),which reveals that the microbiotic crusts have high capability of maintaining topsoil moisture.

在世界干旱区的大量研究表明，作为荒漠生态系统的重要成分，生物结皮的形成能够增强土壤抗风蚀及水蚀的能力〔3~8〕、增强其周围维管植物的养分循环〔9~11〕、通过生物固氮提供丰富的氮源〔12〕、促进种子库的建立和生物多样性等。

But if you were not,no matter the world how wonderful,it is only the moors in my eyes,and me,as lonely and miserable as devil...

但是如果你不在了，无论这个世界有多好，它在我眼里只是一片荒漠，而我就像是一个孤魂野鬼。。。

In addition to furthering our understanding of the ecological and evolutionary aspects of desert plants to their environment, research on mucilaginous seeds will be helpful in building a model system for exploring gene control mechanisms of carbohydrate synthesis and secretion, secondary cell wall biosynthesis and cell morphogenesis.

对粘液种子的研究不仅可全面揭示荒漠植物的生态适应机制及其进化生态意义，还可为研究基因控制的糖类生物合成和分泌、细胞次生壁的生物合成及形态分化建立理想的模式体系。

It is derived that the optimal temperature,optimal pH value,optimal carbon content in media and concentration of NaCl for the growth of oligotrophic bacteria are 37 ℃,8～9,15 mg/L and 1%～20% respectively,which can provide the new conception and theoretical foundation for researching the microorganisms,inhabiting under the peculiar environmental,especially the oligotrophic microorganisms.

通过对新疆荒漠地区分离得到的五株低营养细菌的理化特性研究，初步摸索到了分离培养的方法，并测得其生长温度范围和最适温度37℃；最适pH值8～9；最适含碳量15 mg/L培养基，生长需要1%～20%的NaCl浓度，以及一系列生理生化反应指标，为特殊环境微生物尤其是低营养微生物的研究提供了一些新的思路和理论依据。

The characters of regeneration niche for seed germination,seedling growth,soil seed bank and vegetative reproductionof Papilionaceae and Car agana spp.andits relationship withrestoration of desert vegetation were summarized,for the purpose of providing theoretical basis for regeneration niche in the study onreproductive biology and restoration ecology of C.spp..

对蝶形花科，锦鸡儿属落叶灌木柠条(Caragana spp。)的种子萌发、幼苗生长、土壤种子库和营养繁殖等更新生态位特征及其与荒漠植被恢复的关系进行了综述，旨在为柠条的繁殖生物学和恢复生态学研究提供更新生态位方面的理论依据。

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。

The licorice is an important psammophilous medicinal plant resource, and it's also the main natural component for the semi-desert lawn vegetation in Ningxia.

甘草是重要的沙生药用植物资源，也是宁夏半荒漠草地自然植被的主要组成部分。

Potaninia mongolica Maxim, is recorded in the Chinese plant red book in 1992, as one of rare and endangered plant. More and more attention has been paid to its important ecological effect, ancient floristic geographic element, specific morphology of cardinal number three in Rosaceae and also to its obvious economic value.

绵刺是国家二级重点保护的珍稀濒危植物，1992年被收录于中国植物红皮书，它以独特的三基数形态特征而区别于蔷薇科其它植物，同时绵刺在阿拉善荒漠中具有不可替代的生态作用、古老的区系地理成分、重要的经济价值等诸多特点越来越引起人们的重视。

Based on these, this study was to determine the relationship between standing vegetation and soil seed bank. The main results are as follows: 1 Effects of grazing on plant communities The grazing successions were Stipa klemenzii → Salsola collina + Stipa klemenzii → Salsola collina community in the desert steppe; Stipa grandis or Leymus chinensis → Cleistogenes squarrosa + Stipa krylovii or Stipa grandis → Potentilla acaulis + Cleistogenes squarrosa community in the typical steppes and Leymus chinensis + forbs →Leymus chinensis + Stipa baicalensis community in the meadow steppe.

主要结论如下： 1放牧对植物群落的影响荒漠草原的放牧演替规律为小针茅群落→猪毛菜+小针茅群落→猪毛菜群落；典型草原为羊草或大针茅群落→糙隐子草+大针茅群落或克氏针茅群落→星毛委陵菜+糙隐子草群落；草甸草原为羊草杂类草群落→羊草+贝加尔针茅群落，这是不同物种对牧压的不同适应结果造成的。

According to the clear water experiment, aeration performance of the new equipment is good with high total oxygen transfer coefficient and oxygen utilization ratio.

曝气设备的动力效率在叶轮转速为120rpm～150rpm时取得最大值，此时氧利用率和充氧能力也具有较高值。

The environmental stability of that world - including its crushing pressures and icy darkness - means that some of its most famous inhabitants have survived for eons as evolutionary throwbacks, their bodies undergoing little change.

稳定的海底环境─包括能把人压扁的压力和冰冷的黑暗─意谓海底某些最知名的栖居生物已以演化返祖的样态活了万世，形体几无变化。