干旱地区

Through comprehensive analysis of various physiological indexes, theinitial conclusion was drawn out: Atriplex canescens cannot survive in the areawithout irrigation and or with scarce rainfall; the limitation scope of rainfall forAtriplex canescenss survival is under research; this species can only be extended inthe area with certain favorable rainfall.

通过对各项生理生态指标的综合分析初步得出如下结论：在没有灌溉和降雨量不大的干旱地区难易生存，至于四翅滨藜在降雨量多少毫米的范围内能够生存，还需要进一步的研究；在干旱沙区进行推广，必须有一定的灌溉条件。

Bryophyte ; ecology ; arid and semi-arid areas ; research review

苔藓植物；生态学研究；干旱和半干旱地区；综述

Zinc deficiency occurs worldwide in soils and plants, particularly in calcareous soils of arid and semi-arid regions.

土壤和植物中的锌缺乏是一个全球性的问题，特别是在干旱半干旱地区的石灰性土壤上。

Also called calcrete, a hardened layer in or on a soil formed on calcareous substrata, formed in arid and semiarid regions as a result of fluctuating climatic conditions by calcite that precipitates out of solution as water evaporates at the surface.

也称为钙质结砾岩，是一种在土壤中或土壤上形成的石灰质基底的硬化层。在干旱和半干旱地区由于气候条件的变化，随着水分的蒸发，土壤溶液中的方解石在表面沉淀下来逐渐形成了这种地层。

The common habitat of bryophytes is restricted to dankness, but some bryophytes, such as the species of Pottiaceae, Grimmiaceae, Bryaceae and so on, are able to survive in arid and semi-arid areas with strong ability of drought tolerance.

苔藓植物一般生活在阴湿的地方，但也有不少种类具有极强的耐旱性，在干旱和半干旱地区也有分布。

Combining optimization design with CAD and automatizing completely the process of design have become a important development trend in design method field.A new-style ditcher for sluice and keeping soil humidity is a rotary, discontinuous ditcher. It mainly used in arid and semiarid area, dig pits to sluice in sloping field, meadow, fallow and wasteland.

新型蓄水保墒机具是一种旋转式间断开沟机，主要用在干旱半干旱地区，通过在坡地(＜15°)、草地、休闲地及不能及时耕种的撂荒地上开挖一些小坑来蓄积雨水，使雨水渗到地下，被作物自由吸收利用或补充地下水。

Soil CaCO3 eluviation and deposition process is the most important development and evolution process of soil, from parent material to mature soil in the Loess Plateau, arid and semiarid area.

土壤碳酸钙(CaCO_3)的淋溶淀积过程是黄土高原以及干旱和半干旱地区土壤形成发育的主要过程之一，也是地球化学过程的主要内容。

Due to the inclemency of climate and soil conditions and the intense disturbance of human beings,the soil resources heterogeneity in arid and semi arid grassland ecosystems worldwide was gradually increased during the last century.

世界许多干旱、半干旱地区草地生态系统逐渐被灌木生态系统取代，这种取代过程的发展是由灌木冠幅下土壤中"肥岛"的形成和灌木的扩散相互作用直接造成的。

Doubtlesly, grassland degradation will influence herdman's production activity and the development of pasturing area economy.

草地资源是我国干旱半干旱地区生态安全的重要屏障，也是草地畜牧业发展的重要物质基础。

By studying effects of different drip irrigation patterns of root zone and watering treatments on young apple tree growth and root hydraulic conductivity, it shows that there is a positive correlation between root hydraulic conductivity and root dry mass and water potential.

在果树分布较多的干旱半干旱地区，农田水分和养分与盐分胁迫并存，对果树的生长产生很大的影响，研究控制性分根交替灌溉和环境因素对苹果幼树水分传输的影响对于丰富果树水分传输理论以及节水调控机制具有重要的理论和实际意义。

Since historical times,England ,where the early inhabitants were Celts, has been conquered three times .

从有历史以来，英国，在此地早期居住的是凯尔特人，已经被征服了三次。

Bluetooth OBEX File Transfer Enables the sending and receiving of files on your phone via Bluetooth.

蓝牙OBEX文件移动允许经过蓝牙传送和接受文件。。。。