查询词典 semiarid

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 deals with precipitation fluctuations in the transitional zone between the arid and semiarid regions of northwest China from the 1950s to the 1990s,discusses spatial variation of 250 mm isohyet during the dry years and wet years; and systematically studies rainfall harvesting system relative to runoff inducing catchments, water storage and highly efficient utilization and evaluates the influence of rainwater harvesting on regional development and environment conservation.

分析了干旱半干旱区过渡带降水的时空变异性，确定了250 mm降水量线在丰枯年份的空间摆动幅度。

A 6 years lysimeter experiment shows that an obvious nitrate leaching even occurred in semiarid area agroecosystem.

在不同深度的渗漏池，连续 6年( 11季作物)研究了半干旱地区农田生态系统中硝态氮的淋失。

The effect of nitrogenous fertilizer on root system of naked oat in semiarid region was studied with root bags in field.

通过田间根袋实验研究了氮肥对旱地莜麦根系生长的影响。

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。

The polymeric soil amendmentswere applied in increasing soil value,and reclamation of saliane sodic soil,and greeningdesert,and controlling water and soil erosion,and amending arid and semiarid soil,andincreasing fertilizer utilization rate and crop yield,etc.

本文研究了淀粉接枝共聚物、羧甲基纤维素接枝共聚物、壳聚糖接枝共聚物、聚丙烯酰胺及其衍生物等对赤红壤的改良作用，揭示了赤红壤在这些聚合物作用下理化参数的变化规律。

Arid and semiarid areas are main areas of food production in our country.

干旱和半干旱地区是我国重要的农业生产区，水分不足和养分缺乏是制约其生产发展的两个关键因素。

Many countries in arid and semiarid areas have attached much importance to it since it started in the 1930's.

从20世纪30年代兴起后，受到世界上干旱和半干旱地区各国家的重视。

Soil erosion by wind is a major cause of farmland degradation in arid and semiarid area of north China.

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。

This technique proves suitable to semiarid areas for the purpose of increasing rainwater use efficiency.

该技术是适合于半干旱地区的一种能较好提高降水利用率的种植方式。

Neither the killing of Mr Zarqawi nor any breakthrough on the political front will stop the insurgency and the fratricidal murders in their tracks.

在对危险的南部地区访问时，他斥责什叶派民兵领导人对中央集权的挑衅行为。

In fact,I've got him on the satellite mobile right now.

实际上 我们已接通卫星可视电话了