查询词典 arid region

In Shanxi Province in aridity and semi-arid region, the groundwater is the important resource of water supply.

在处于干旱与半干旱地区的陕西省，地下水是重要的供水水源。

Our study regarded Pear and Aids Apricot tree which be used to develop afforestation by water-harvesting in Semi-arid Region on Loess Plateaus as experience forest. In the case of water-retaining agent, we study the physical effect of water-retaining agent on soil water shifting balance and water use efficiency through soil-water-atmosphere conium system.

本研究以黄土半干旱区集水造林的杏树和梨树为试验林分，采取以保水剂为中心的综合保水技术，运用土壤—植物—大气连续体理论和土壤物理学理论，系统地研究了保水剂对土壤水分动态及其利用效率的影响，得到如下主要结论： 1。

Phase 1 started with field pea followed by spring wheat whereas phase 2 started with spring wheat followed by field pea.The objectives of this thesis are:1 to quantitatively analyze effects of soil chemical,physical and biological properties on soil quality and productivity under different tillage systems and the driving factors for the changes of soil quality under tillage in a long-term,2 to select the best soil quality assessment indicators,and 3 to establish soil quality assessment models that are suitable for the erodible environment of semi-arid region on the Loess Plateau.

通过分析3个轮作周期不同耕作方式下土壤理化性质、生物性质和生产力对土壤质量的影响，阐明长期耕作过程中土壤质量的演变特征及其驱动因子，筛选出适宜于黄土高原半干旱区侵蚀环境下土壤质量评价的代表性指标；并综合前人的研究，结合区域特点，建立适宜于黄土高原半干旱区侵蚀环境的土壤质量评价模型。

This forbiddingly arid region covers 56,000 square miles (145,000 square kilometers) of central Australia and boasts some of the largest sand dunes in the world.

这个可怕的不毛之地涵盖56000平方英里（145000平方公里）在澳大利亚中部并称是世界上最大的沙丘。

North-West China is an arid region where the saline soil is widely distributed, and therefore is rich in halophyte plants.

中国西北地区是我国干旱、盐碱化土壤分布面积较广、土壤积盐较重的地区，这里发育着丰富的盐生植物。

The 250 mm isohyet is used as the climatic boundary line between arid and semiarid region and it shifts at a maximum distance of 110-130 km during the extreme dry and wet year.

干旱半干旱过渡带是生态环境变化的敏感和脆弱地带，气候的波动性和人口压力是生态脆弱的根本原因，干旱和半干旱区交界线在丰枯年份的空间摆动幅度最大达110-130km。

This study attempted to extract lithlogical and mineralogical information in the arid region using the ASTER multispectral data.

本研究尝试利用ASTER 可见光近红外和短波红外的多光谱遥感数据提取干旱地区的岩石与矿物信息。

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。

By field investigations arid textual research, there are 23 genera 41 species of wild orchidaceous plants in the Chaozhou-Shantou Region.

对潮汕地区兰科植物种类、分类、生境等进行了整理报道。

At leaf scale, TJ photosynthesis model was selected and Gao stomatal conductance model was proved suitable for semi-arid region after comparing with BBL model through the parameter regression and analysis of model sensitivity. Plant physio-ecological characteristics were analyzed based on the parameters gained from the nonlinear regression using TJ model and Gao model with field experimental data. As C4 photosynthesis types Zea mays and Panicum miliaceum 's carboxylation coefficient are bigger than the others.

在叶片尺度上，选择TJ模型作为叶片尺度所使用的光合模型，并对景观模拟中经常用到的Ball-Berry模型和Gao模型进行比较，通过参数拟合和模型的敏感性分析，选择Gao模型作为叶片尺度的气孔导度模型，应用模型模拟的结果，分析了研究区主要植物种的生理生态学特性。C4光合型的玉米和糜子，羧化速率系数大，光合能力强。

A carrier gas such as nitrogen is directed through line 20 and valve 22 to connect with line 26 and mix with the gas sample.

如氮气之类的载体通过管线20和阀22引入，与管线26相通，与气体样品混合。

But for the most part, knaves and parasites had the command of his fortune

然而支配他的家产的大多是恶棍和寄生虫。