查询词典 semiarid

Soil erosion by wind, as a natural disaster haunts on dry lands, not only degrades soil productivity but also often results in dust blizzard weather. It may cause pollutions of air and water, damages of highway and railway, wear and tear of buildings and machinery and harmfulness in health of people and animals. Therefore, to combat wind erosion means improving the environment for people to live and work, means heightening the living standard of the local people, and means promoting productive forces. But China has a vast land where probably occur wind erosion disasters, the arid, semiarid and subhumid areas of the temperate zone all are potentially hit by wind erosion. To control wind erosion in China is a very arduous task. More difficult is to achieve recognizable effectiveness with lowest cost.

中文题名宁夏土壤风蚀研究副题名外文题名 Estimation of wind erosion in Ningxia 论文作者李玉宝导师王礼先孙保平教授学科专业水土保持与荒漠化防治研究领域\研究方向荒漠化防治学位级别博士学位授予单位北京林业大学学位授予日期2001 论文页码总数100页关键词风蚀土壤风蚀土壤侵蚀馆藏号BSLW /2003 /S157 /14 中国发生土壤风蚀的潜在区域包括温带干旱、亚干旱和亚湿润气候下的广大地区，如何有效地预防和治理土壤风蚀，如何以最小的代价达到满意的防治效果，这是很值得研究的问题。

The eco-physiological characteristics of drought endurance of Pinus sylvestris var.mongolica were studied under different climatic regions, soil water and leaf water condition.Furthemore,the response and adaptability of trees to water stress was done.The below showed the results. 1 The parameters of drought endurance of P. sylvestris var. mongolica was measure and studied by PV technology in the subhumid, semiarid and arid regions The results indicated the osmotic potentials at water saturation condition and at the initial loss turgor decreased as the climatic drought degree increased,and related linearly with the climatic moisture index.It was proved that the drought endurance of P. sylvetris var. mongolica was varible and the elevation of the osmotic adjust capability was a main way to the adaptation of trees to the drought climatic environment.

本文研究了樟子松(Pinus sylvestris var.mongolica)的主要耐旱生理生态特征在不同地区、不同土壤水分状况和叶水分状况下的变化，进而研究了樟子松对水分胁迫的反应和适应，结果如下： 1 应用 PV 技术对半湿润区、半干旱区和干旱区樟子松耐旱性指标测定研究指出，水饱和总体渗透势和初始失膨点总体渗透势随着气候干旱程度增加而增加，与气候湿度指标呈直线相关，证明了樟子松属于耐旱性可变的树种，渗透调节能力增加是其对干旱气候适应的主要途径。

Whether rainy year or dry year,semiarid or subhumid region,the site evaporation account for a largeproportion in the total water consumption,transpiration next,crown interception and surface runoff smallest,butthe importance of artificial regulation is:evaporation＞runoff＞anspiration＞crown interception.

黄土高原人工林系统耗水量，无论丰水年或枯水年，均以林地蒸发耗水最大，其次为林木蒸腾、林冠截留，地表径流最小。其人工调控的重要性以林地土壤蒸发位居第一，地表径流远在林冠截留甚至林木蒸腾之上。

In order to deeply understand biomass formation for Panicum virgatum in the semiarid loess hilly-gully regions, we investigated the biomass production, ramet generation, and resource supply and demand at the plot and tussock scales during the yearly life cycles of two switchgrass species, i.e. early-maturing and late-maturing ones, respectively.

为深入认识半干旱黄土丘陵沟壑区引种能源植物柳枝稷生物质生产的开发潜力及其约束机制，调查了农田、植丛尺度上早熟和晚熟柳枝稷年度生命周期内生物量累积、分株建成动态，以及土壤水分供求平衡过程。

The Sahara divides the continent into North and Sub-Saharan Africa . These two regions are culturally and climatically distinct. The southern border of the Sahara is marked by a band of semiarid savanna called the Sahel ; south of the Sahel lies the lusher Sudan .

撒哈拉沙漠将非洲大陆分割成两部分，北非和南部黑非洲，这两部分的气候和文化截然不同，撒哈拉沙漠南部边界是半干旱的热带稀树草原，阿拉伯语称为&萨赫勒&，再往南就是雨水充沛，植物繁茂的南部非洲，阿拉伯语称为&苏丹&，意思是黑非洲。

The infection is not transmitted person to person and is caused by the fungus Coccidioides immitis, which is found in soil in certain semiarid areas of North and South America.

这种病的感染不通过人际传播，而是由粗球霉菌造成，这种真菌存在于美国北部和南部一些半干旱区域的土壤中。

Decadal variations of arid and semiarid boundary in China during last 100 years have been analyzed by using Thornthwaite's method.

利用Thornthwaite的干湿分类函数，对近100年中国干旱和半干旱区界限的10年际变动特征进行了分析。

Our country's deserts mainly lie in arid and semiarid areas, mostly with scarce precipitation and lack of water resource, neither natural vegetation with relatively strong drought-resistance capability nor plantation, like diversifolious poplar, dryland willow, shrubby sand willow, saxoul and Hedysarum mongolicum Turcz,etc., can be protected effectively, this leads to desertification area expansion and frequent sand storm, which seriously affect people's work and life.

我国沙漠多处于干旱和半干旱地区，绝大部分地区降水稀少，水资源缺乏，无论是具有较强抗旱能力的天然植被，还是人造林如胡杨、旱柳，灌木类沙柳、梭梭、杨柴等都得不到有效保护，导致沙化面积扩大，沙尘暴发生频繁，给人民群众的生产生活带来严重影响。

Plastic film is a modernization planting technique in droughty and semiarid area, it is adapted to wheat, cootten, corn, peanut and so on. Plastic film can save water, protract crops vegetal time, increase production.

地膜覆膜是在干旱、半干旱地区推广使用的一种现代化种植工艺，适用于小麦、棉花、玉米和花生等农作物，能够达到节水、延长作物的生长期、增产等目的。

Plastic film is a modernization planting technique in droughty and semiarid area, it is adapted to wheat, cootten, corn, peanut and so on. Plastic film can save water, protract crop's vegetal time, increase production.

地膜覆膜是在干旱、半干旱地区推广使用的一种现代化种植工艺，适用于小麦、棉花、玉米和花生等农作物，能够达到节水、延长作物的生长期、增产等目的。

This one mode pays close attention to network credence foundation of the businessman very much.

这一模式非常关注商人的网络信用基础。

Cell morphology of bacterial ghost of Pasteurella multocida was observed by scanning electron microscopy and inactivation ratio was estimated by CFU analysi.

扫描电镜观察多杀性巴氏杆菌细菌幽灵和菌落形成单位评价遗传灭活率。