另一方面，在干旱和半干旱地区，湖泊数量少，湖泊之间距离远，减少了相互关联的可能性。
In arid and semiarid regions, on the other hand, the small number of lakes and the great distances between them reduce the possibilities for correlation.
在半干旱地区，草地通常是最主要的天然植被，而该地区主要的经济活动是家畜饲养。
The raising of livestock is a major economic activity in semiarid lands, where grasses are generally the dominant type of natural vegetation.
美国西南部半干旱地区的湖泊水位在上一个冰河时代似乎比现在更高，这一事实曾一度归因于降水增加。
The fact that lake levels in the semiarid southwestern United States appear to have been higher during the last ice age than they are now was at one time attributed to increased precipitation.
华北地区位于干旱和半干旱地区。
摘要华北地区位于干旱和半干旱地区。
尤其在半干旱地区，对水的依赖性更强。
旱地管理：指对干旱和半干旱地区的管理。
Dryland (s) management: The management of arid and semi-arid areas.
半干旱地区具有降水不匀和多变低水的特点。
The semi-arid area which grows the crops have the characteristics of uneven and little rainfall.
水资源紧缺限制了干旱半干旱地区农业生产。
Shortage of water resources restricted agricultural production in arid and semiarid region.
中国西部干旱半干旱地区约占全国土地面积的37。
The arid and semi-arid areas in the west part of China comprise about 37.
沙漠化使干旱或半干旱地区维持生命的能力逐渐枯竭。
Desertification drains an arid or semiarid land of its life - supporting capabilities.
沙漠化使干旱或半干旱地区维持生命的能力逐渐枯竭。
Desertification drains an arid or semiarid land of its life-supporting capabilities.
固体水为干旱、半干旱地区的抗旱造林提供了一种新的途径。
Solid water affords a new approach to drought resistant planting in arid and semi arid area.
它的范围遍及中美洲，从萨尔瓦多到北部墨西哥的半干旱地区。
Its territory covers Mesoamerica, from El Salvador to the semi-arid regions of Northen Mexico.
土壤风蚀是中国北方干旱半干旱地区农田土地退化的重要原因。
Soil erosion by wind is a major cause of farmland degradation in arid and semiarid area of north China.
中国北方干旱半干旱地区的气象条件有利于土壤凝结水的形成。
The micro-meteorological conditions are advantageous for forming soil condensate in arid and semiarid regions in north China.
在黄土高原半干旱地区，对旱地春小麦进行短期地膜覆盖试验。
The field trial of plastic film mulching on dryland spring wheat was conducted in the semiarid region of Loess Plateau.
在干旱半干旱地区，封闭湖泊的湖水盐度对气候变化反应敏感。
The salinity of lake water is a sensitive monitor of climate in arid and semiarid region.
这为干旱、半干旱地区制定合理的土地利用规划提供了科学依据。
This provides scientific basis for rational land use planning in arid and semi-arid areas.
北方干旱、半干旱地区地下水超采严重，水资源供需矛盾突出。
Groundwater overexploitation is very serious in arid or semiarid areas of North China.
结果表明，两种产流预报模型均可用于北方半湿润半干旱地区。
The result indicates that two runoff producing forecast models are all suitable in north semi-moisture semi-aridity region.
风蚀是全球性的自然灾害之一，此现象广泛分布于干旱半干旱地区。
Wind erosion is one of nature disaster around globe. This phenomenon is widely distributed in arid and semiarid area.
在东北半干旱地区，研究有限供水对干物质积累及产量性状的影响。
In semiarid area northeast, researching the effect of the dry matter cumulation and the yield character on limited water supply.
因此，旱地春小麦秋覆膜穴播栽培技术在半干旱地区有较高的推广价值。
So that hole seeding of dryland spring wheat with autumn mulching has a high extension value in semiarid areas.
在辽宁省西部干旱和半干旱地区建议采用以留茬覆盖为主的保护性耕作方式。
Remaining of stubble and straw covering was suggested to be adopted in western arid and semi-arid areas of Liaoning province.
侯赛因及其同事长期的研究表明，大坝尤其使干旱或半干旱地区的极端降水模式发生改变。
The long-term studies by Hossain and his colleagues suggest that dams have particularly altered extreme precipitation patterns in arid or semiarid areas.
田间试验研究了西北干旱半干旱地区地膜覆盖对土壤中n 2o排放通量变化的影响。
Field experiments was used to study the change of soil N2O discharge flux in the northwestern arid and semi-arid areas.
通过在黄土高原半干旱地区种植柳枝稷，构建生物量与土壤水分的动力学关系模型。
The dynamic relationship between the biomass of switchgrass and the soil water content in arid and semiarid area was investigated in this paper.
沙土是存在于干旱、半干旱地区的一种特殊性土，其岩土工程性质与风沙环境紧密相关。
As a kind of special soil, aeolian sandy soil mainly lies in arid and semiarid areas where sand drift activity is very strong.
沙土是存在于干旱、半干旱地区的一种特殊性土，其岩土工程性质与风沙环境紧密相关。
As a kind of special soil, aeolian sandy soil mainly lies in arid and semiarid areas where sand drift activity is very strong.
应用推荐