Techniques in applying water tofarmland and de veloping counterproposals for increasing water use efficiency 提高水分利用效率的田间施水技术与发展对策
( 2 ) in case of specified volume of applied water , the shape of wetted soil volume is influenced by discharge rate ( 2 )在灌水量一定的情况下,滴头流量对湿润体的形状有明显的影响。
Deep pipe irrigation can be especially useful on slopes and in crusty soils where surface applied water will run off 描述:深度管道灌溉在斜坡和硬质土壤环境中非常适用,因为在那些地方地表灌溉浪费水资源。
Three kinds of method is applied water spray with pump , water curtain without pump , and dry adsorption to tackle waste gas 并对有泵水雾、无泵水幕、干式吸附三种治理工艺方法、吸收装置结构及运行特点进行分析对比。
Many of the researches carried out have concentrated on how to apply water and nutrients effectively to achieve the goal of high yield , good quality and high efficiency 如何有效地对二者进行调控,达到高产、优质和高效的生产目的,国内外已进行了大量的研究。
By accomplishing environment effect evaluation and economy assessment analysis , the writer shows the economic reasonableness of applying water - saving reform engineering to the irrigation area 完成了环境影响评价及经济评价分析,说明灌区实施节水改造工程在经济上是合理的。
The engine applies water - cooling system , so the working circumstance is improved the combustion ratio , power and torque . the fuel consumption and the exhausting gas are reduced at the same time 采用水冷技术,改善了热机部分的工作环境,提高燃烧效率,增大了功率和扭矩,同时油耗和排放降低。
Considers that applying water source heat pump can reduce initial investment , operating cost and atmospheric pollution effects when recycling cooling - water from power plant is used 认为在具备利用电厂循环冷却水条件的场所,采用水源热泵为建筑供暖可以减少初投资、运行费用以及对城市的污染影响。
To touch pencil sketches and drawings up , either the western watercolour or the special " ju - school technique " is used . coloured pencil drawings made in the latter way have the applied chinese pigments " washed " by water , or in the other way round , by applying water before pigments 其中铅笔淡彩是在铅笔速写、素描之上,或以西方的水彩画法施以淡薄的颜色,或以"居派"独特的"撞水撞粉法"赋彩。
This research was conducted to : ( 1 ) understand the characteristic and pattern of trickle source infiltration , ( 2 ) study mulched crop evapotraspiration for cotton and corn in a arid climate sandy loam soils . according to the researches of the dissertation , the main results are as follows : ( 1 ) the shape of wetted soil volume is influenced by soil texture , discharge rate and the total volume of applied water in case of trickle source infiltration 本文以粘壤土为研究对象,对微源入渗特性规律进行了系统的室内试验研究,并且对膜下滴灌大田作物棉花和玉米的需水规律进行了野外试验,得到了以下几点结论: ( 1 )地表微源入渗土壤湿润体的形状受到土壤质地、供水强度和灌水时间的影响,一般为半个椭球体。