查询词典 arid region

Flos lonicerae has typical morphological and physiological characteristics of xerophil so that it can be utilized in ecological management as well as soil and water conservation in arid region.

对不同岩溶地质环境下蜈蚣草和黄荆适生状况对比研究表明，蜈蚣草适合于石漠化的早期治理阶段，在中后期治理中，选用CA活性较高的黄荆等落叶灌木或小乔木可能更为有效。

It provides basic data and technical support for Cultivation and Management and seed propagation of Agropyron cristatum in arid region . The results showed as follows:(1)Agropyron cristatum is cross pollinated forage .There were great difference among plants within populations.

研究结果表明：(1)冰草是异花授粉牧草，群体内株间变异较大，根系的生态生活型、种子外稃被毛、叶片表皮被毛等方面存在着丰富的遗传多样性。

Wedelia trilobata is a species of Asteraceae arid primarily native to tropical Central and South America; it had been frequently introduced for gardening. Nowadays it has widely been distributed in the region of South China and other seaside.

南美蟛蜞菊Wedelia trilobata为菊科蟛蜞菊属植物，原产中、南美洲，由最初的绿化引进开始，现广泛分布于我国华南地区及沿海部分地区。

During ～2.68-2.45 Ma, the vegetation was dominated by arbores, mainly Pinus, Chenopodiaceae and Artemisia, indicating a cold warm climate in the mountain region. During ～2.45-2.11 Ma, herbs increased rapidly and the climate became dry-cold, indicating the characteristic of the bushveld climate. During 2.11-1.49 Ma, the quantity and species of the herbs reached the culmination and the bush increased accordingly, showing that the climate became more and more arid. During 1.49-1.36 Ma, herbs declined slightly but pteridophytes increased relatively greatly, revealing a dry-cold grassland climate.

约在2.68～2.45Ma期间，植被以乔木为主，主要为松、藜、蒿，属山地寒温气候；约在 2.45～2.11Ma期间，草本植物迅速上升，气候变得干旱寒冷，显示出灌木草原气候特征；在2.11～1.49Ma期间，草本植物数量和种类达到之最，灌木相对增加，也显示气候进一步趋于干旱；在1.49～1.36Ma期间，草本植物有小幅下降，但蕨类植物增加幅度较大，显示了干冷草原气候特征。

In Northwest Arid Region, along with the developing of social economy and the accelerating of citified process, scarce condition will be more stressed, has affected the development of social economy greatly.

本论文在借鉴国内外先进经验的基础上，结合张掖实例，探索研究了我国西北干旱区生态环境质量评价和水资源合理配置的途径和方法，以期使短缺的水资源能够得到最合理的配置和利用。

ABSTRACT This dissertation, based on the theories of geography, ecology, economics, sociology and environmental sciences, has analyzed the impact of transition between cultivation and pasture animal husbandry on the mechanism of desertification in Kerqin Sandy Region, of which behavior mechanism of local people was emphasized. The changing direction of integrated land desertification control strategy in semi-arid regions was discussed after having explored the primary reasons of estrepement, overgrazing and excessive firewood gathering. Followings are the main research works having been done.

本文选取科尔沁沙地作为研究区域，以两种最主要的土地利用方式、也是两种最主要的生产方式——农、牧业作为研究对象，依据地理学、生态学、经济学、社会学与环境科学的基本理论与方法，基于现有研究资料的系统整合，结合野外调查的结果，从更加综合的角度，来研究农、牧业选择变化对沙漠化过程的影响机理，从农、牧业选择变化的角度来揭示&滥垦、滥牧、滥樵&的本质，进而寻求中国北方半干旱地区生态环境综合整治的对策。

High salinity and temperature induce seeds of euhalophytes Halostachys caspica, Kalidium foliatum and Halocnemum strobilaceum to remain ungerminated, and seeds germination and seedling establishment of the three halophytic species can be ensured only when temperature and edaphic conditions are favorable. This is most likely an important adaptive strategy in these halophytic species to survive their saline environment in an arid region in Xinjiang;(2) morphological adaptations.

三种真盐生植物盐穗木、盐爪爪和盐节木种子在高盐和高温时不萌发，只有当温度和盐分适宦时种子才萌发，有利于幼苗的成活，是这三种植物适应新疆极端生境的策略。

The inland arid area of China is very broad,such as Hexi corridor of Gansu Province, Ta Limu Basin and Zhun Ge'er Basin of Xinjiang Uygur Autonomous Region, Chai Damu Basin of Qinhai Province that are all the type of Gobi and generated by the dry climate condition. There are broad plain area and abundance heat resources of sun in these basins.

我国内陆干旱区面积广阔，均为干旱气候条件下所形成的典型戈壁沙漠地区，主要包括甘肃河西走廊、新疆准噶尔盆地、塔里木盆地及青海柴达木盆地等内陆盆地。

The results showed: the microbiotic soil crust inhibited the growth of the plant after promoting it in Northern semi-arid region.

研究表明：北方半干旱区生物结皮对植物生长存在先促进、后抑制的过程。

These results are helpful for understanding of water consumption in oases of arid region and implementation of water resources deployment.

深化了绿洲耗水的认识并为绿洲水资源配置提供依据。

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。