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The requirement of moisture for carpogenic germination and growth of the pathogen are reasons why rainy periods or irrigation are associated with outbreaks of disease on certain crops. Disease development is favored by moderate temperatures of 15 - 25 C.

子实体萌发和病菌生长对湿度的需要可以解释为什么在多雨期或灌溉时易爆发菌核病,15~25℃的温度对菌核病的发展十分有利。

The research aimed to provide references for the breeding and water saving irrigation of Cerasus humilis Bunge.

[目的]为欧李人工栽培及节水灌溉提供理论依据。

The weed seeds of 21 species belonging to 14 families (mainly Gramineae, Primulaceae, Polygonaceae, and Chenopodiaceae) could be dispersed into the paddy field by irrigation water.

有14科21种杂草种子随灌溉水流输入稻田,这些杂草种子主要隶属禾本科、报春花科、藜科、蓼科等。

Thus a power plant may withdraw substantial amounts of water for cooling from a river but use that permits it to be returned directly to the river, perhaps a bit warmer, for use by the next downstream user, A farmer may withdraw the same amount of water for irrigation, but the vast majority of it may be used consumptively by plants and become unavailable for any other activity.

例如,电厂可以从江河里提取大量的水用于冷却,而不是使用,这样就允许水直接返回到江河里,也许水温稍稍有点热,但可供下游的用户使用。农民可能提取相同的水量用于灌溉,但是大部分水被电厂消耗掉,无法用于其它活动。

Soil salinity is a severe global problem, nearly 10% of the total land surface is coved with different types of salt affected soils.

土壤盐渍化对农林业的影响是一个全球性的问题,全球20%的耕地和近半数的灌溉土地都受到不同程度的盐害威胁,所以植物抗盐育种一直是研究热点。

An experiment was conducted in solar greenhouse to study the effects of graft and different nitrogen supply levels 0, 110, and 331 kghm^(-2 on the water consumption and water use efficiency of cucumber Cucumis sativus L.

在日光温室内研究了常规灌溉条件下,嫁接和3种施氮水平(0、110和331 kghm^(-2))对日光温室黄瓜耗水量和水分利用效率的影响。

On agricultural front 50 per cent of our cultivable land is still unirrigated.

在农业上,百分之50的可耕地仍然没有开垦灌溉

The study was carried out on the volume reduction and main pollutants removal of recirculated landfill leachate with different diluted concentrations by irrigation on the soil planted with and without Cynodon dactyton.

在模拟的填埋场封场覆盖层上灌溉处理不同强度的渗滤液稀释液,研究其水量减量和主要污染物COD和NH3-N的去除效果。

From now on, sewage has been important water source for irrigated district near outskirts of cities, especially droughty territory of north china, where the scarcity of water has been the main factor influencing human lives and economic development there.

然而盲目使用污水进行灌溉会引起各种形式的污染问题,虽然其中某些形式的污染是可以通过污水预处理避免的,如可以通过对污水的二级处理消除污水中的重金属元素等,但是对于如何消除污水中非金属类污染物则比较困难。

It has become the restrictive factor of economic development. The implement of water saving rebuild programming in northern droughty areas is an important measure for sustainable use of water.This study is based on the investigation of the type, step and method of SEA, and focuses on the water saving rebuild programming in Mongolia Hetao regions as a case. The SEA technique is applied to agricultural sustaining using of water. The contents and impact factors are summarized along with the objective and standards defined clearly. This paper also offers assessment indexs on water saving rebuild programming, which evaluates the subsequent environmental impacts and public benefits. Some measures avoiding the negative impact are also presented to ensure that this programming is in accordance with the principle of sustainable development.

本论文在对战略环评的类型、步骤和方法进行充分调研的基础上,针对内蒙河套灌区水资源可持续利用的节水改造规划,将战略环评的相关方法应用到灌区农业水资源的可持续利用战略中,概括其环境评价所涵盖的内容,分析总结相关的影响因子,明确评价目标和标准,尤其突出战略环评在节水改造规划应用中的评价指标,重点评价灌溉节水改造规划实施后,对环境产生的影响及其环境经济效益,并提出减缓负面影响的保护措施,使这一规划在实施过程中更加符合可持续发展的原则。

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The split between the two groups can hardly be papered over.

这两个团体间的分歧难以掩饰。

This approach not only encourages a greater number of responses, but minimizes the likelihood of stale groupthink.

这种做法不仅鼓励了更多的反应,而且减少跟风的可能性。

The new PS20 solar power tower collected sunlight through mirrors known as "heliostats" to produce steam that is converted into electricity by a turbine in Sanlucar la Mayor, Spain, Wednesday.

聚光:照片上是建在西班牙桑路卡拉马尤城的一座新型PS20塔式太阳能电站。被称为&日光反射装置&的镜子将太阳光反射到主塔,然后用聚集的热量产生蒸汽进而通过涡轮机转化为电力