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半荒漠

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Alectoris magna and Alectoris chukar are all the indicated birds of arid and semi-arid environment in northern China.

大石鸡和石鸡是我国北方干旱、半干旱荒漠环境的指示鸟类,前者是我国特有种,分布区狭窄,后者是广布种,亚种分化众多。

In experiment,we controlled soil moisture by methods of artificial rainfall and restoring water in soil post;soil treatments included non-cover,mealie haulm cover and gravel cover.

在干旱半干旱的黄土高原和广大的荒漠地区,林地的生态系统十分脆弱,土壤水分动态制约着这些地区生态恢复与植被重建工程的可持续性[1]。

Under the effect of both the natural and the social factors, Urumqi has a serious air pollution problem and poor environment quality. To make things much worse, it is located in a typical arid and semiarid hungriness, which add to the difficulty and requirement of the landscape greening. Since Urumqi is stepping up her way to National Garden City at present, the research of her urban greenbelt landscape is of great practical significance.

乌鲁木齐市处于典型的干旱、半干旱荒漠背景下,在自然因素和社会因素的综合作用下,大气污染严重,环境质量较差,园林绿化难度较大、要求较高,且乌鲁木齐市当前正在创建国家园林城市,对其城市绿地景观的研究具有积极重要的现实意义。

Loess Plateau is locate in areas transited from semi-arid and semi-humid areas to arid hungriness area, Because of the influence of war and long-term\'s unreasonable utilization, the ecological environment in this region is poor and serious soil and water loss is heavy. The water and soil conservation ecosystem project of emphasis tributary is implemented by Yellow River Committee from 2000, during several years centralized treatment,Project Construction have got remarkable effect.

黄土高原地处我国从半湿润半干旱带向干旱荒漠带过渡的地区,由于受历史上战乱和人为不合理开发利用的影响,生态环境比较脆弱,经济发展滞后,水土流失严重。2000年以来,黄委会启动实施了以黄河多沙粗沙区为治理重点的黄河水土保持坡面生态工程的重点支流治理项目,经过几年投资集中治理,项目建设成效显著。

Nostoc flagelliforme is a kind of terrestrial filamentous nitrogen-fixing cyanobacterium distributing in arid and semiarid region of north-western China.It has a great economic and ecological value.So its fundamental study and application study for protection and development have been studied in different ways.

发菜是一种固氮陆生蓝藻,我国主要分布于西北干旱半干旱荒漠草原地带,具有重要的经济和生态价值,围绕发菜资源基础研究和保护开发的应用研究已广泛开展。

Shrubs and undershrubs in desert-oasis ecotone can be divided into four groups based on the niche breadth. Based on the niche overlaps matrix, overlap between Reaumuria soongorica and Haloxylon ammodendron is large; overlaps among Kalidium foliatum、 Suaeda physophora、Kalidium caspicum、Tamarix ramosissima、T. elongata are large; the others'overlaps are small.

阜康荒漠绿洲过渡带灌木、半灌木按生态位宽度可分成4类;根据生态位重叠矩阵,红砂和梭梭之间、囊果碱蓬、里海盐爪爪、多枝柽柳和长穗柽柳之间重叠较大,其余种重叠值均较小。

Soil microbiotic crusts are widespread in arid and semiarid regions, they are one of the major components of desert ecosystems, and their importance has been demonstrated by numerous researches.

:生物土壤结皮广泛分布在干旱半干旱地区与寒区荒漠,是荒漠生态系统的主要组成和景观特征之一,其重要性已被大量的研究报道所证实。

Forty years of re-vegetation, mainly by xerophytic shrubs Artemisia ordosica Krasch and Caragana korshinskii Kom, in the Shapotou Desert Experimental Research Station has established a dwarf-shrub and herbaceous cover on stabilized sand dunes.

:在草原化荒漠带沙坡头地区,利用草方格沙障并栽植灌木柠条和半灌木油蒿对流动沙丘进行固定,经过40a的演变,逐渐形成由矮灌木与草本植物覆盖的固定沙丘景观。

Scaly slipping is a special gravitational erosion taking place in transitive zone from semiarid grass vegetation to desert in No.5 subregion of gullied and rolling loess region.

鳞片状滑移是发生在黄丘五副区半干旱草原植被向荒漠过渡地带的一种特殊的重力侵蚀现象。

Is within the flow region, rivers rare, soil essential for the desert soil, and thick bone soil and saline soil; vegetation is extremely sparse shrubs, semi-shrubs, mainly, there are large tracts of land barren; land type is mainly mountainous and desert, erosion stone Gobi, alluvial gravel Gobi and mobile sand.

属内流区,河流稀少,土壤基本为荒漠土、粗骨土和盐土;植被以极其稀疏的灌木、半灌木为主,还有大片土地寸草不生;土地类型则主要为山地荒漠、剥蚀石质戈壁、洪积砾石戈壁以及流动沙地。

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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。

When I was in school, the rabbi explained everythingin the Bible two different ways.

当我上学的时候,老师解释《圣经》用两种不同的方法。