助手标题  
全文文献 工具书 数字 学术定义 翻译助手 学术趋势 更多
查询帮助
意见反馈
   irrigation 在 农业基础科学 分类中 的翻译结果: 查询用时:0.011秒
图标索引 在分类学科中查询
所有学科
农业基础科学
农业工程
农作物
农艺学
水利水电工程
园艺
环境科学与资源利用
农业经济
林业
更多类别查询

图标索引 历史查询
 

irrigation
相关语句
  灌溉
    Research on Shandong Irrigation Water Use and Management
    山东省灌溉水资源利用管理研究
短句来源
    The Effects of Sewage Water Irrigation on Winter Wheat and the Environmental Economy Analysis.
    污水灌溉对冬小麦的影响及环境经济效益分析
短句来源
    A Prediction Model of Irrigation of Fruit Trees
    果树的灌溉预报模型
短句来源
    Soil Moisture Regulation in Optimized Irrigation System for Rice
    水稻优化灌溉制度的土壤水分调节
短句来源
    Survey of Thirst Signals in Water Saving Irrigation Control
    节水灌溉控制中需水信号的述评
短句来源
更多       
  灌水
    The data showed that water content of the surface layer of two observation point in ridge section was 65% and 66% of field capacity before irrigation,respectively,while increase to 73% and 80% after 144 hours(6 d) and to 78% and 79% after 408 hours(17 d) because of the furrow water's lateral infiltration after irrigation.
    试验数据显示,在本试验条件下,垄背剖面的两个观测点表层,灌水前其含水量仅为田间持水量的65%和66%,灌水后垄沟水分的侧向入渗,144 h(6 d)分别达到田间持水量的73%和80%,408 h(17 d)达到田间持水量的78%和79%。
短句来源
    The experimental results indicate that irrigation quota has the less influence on the yield.
    研究表明不同灌水定额 (375 ,5 2 5 m3 / hm2 )对产量的影响较小 ,这主要与该地的土壤结构有关 ;
    Dynamic Numerical Simulation of Soil Moisture and Establishment of Irrigation index in Cotton Yield
    棉田土壤水分动态数值模拟及灌水指标的确立
短句来源
    Study on Soil Water Movement in Cotton field under CN Irrigation
    CN灌水条件下田间棉花土壤水分运动数值分析
短句来源
    Conformation of Optimal Irrigation During Course of Gypsum Improving Basified Soil ——Select 20 cm as Planning Improvement Layer
    石膏改良碱化土壤过程中最佳灌水量的确定——选定20cm为计划改良层
短句来源
更多       
  
    Irrigation—warping soils in China
    中国的淤土
短句来源
    In 2002, the negative external effect value caused by the improper utilization was 0.157 billion Yuan, occupying about 3.2% of the agricultural increased value of the year, the environmental total cost of farmland area in overage was about 631.77Yuan/hm2. The environmental cost from sewage irrigation was for about 888.5Yuan/hm2 occupying about 45.1% of the total environmental pollution cost.
    结果表明,2002年因不合理利用所导致的负外部效应价值为1.57亿元,约占当年农业增加值的3.2%,环境总成本平均到耕地面积上约为631.77元/hm2.在已定量化的负外部影响中,污造成的环境代价大约为888.5元/hm2,约占环境污染总成本的45.1%;
短句来源
    There is more 127.5kg/666.7m2 product of cotton in the drop irrigation under plastic film than in the soft pipe irrigation under plastic film.
    棉花膜下滴平均单产(籽棉)比棉花膜下软管平均单产(籽棉)多127.5kg/666.7m2。
短句来源
    A Rotation Irrigation design of Programmable and Automatic Control System for Tobacco Field
    烟园轮可编程自动控制系统设计
短句来源
    A preliminary study of soil permeability characteristics under sewage irrigation
    污条件下土壤水渗透特征初探
短句来源
更多       
  “irrigation”译为未确定词的双语例句
    On the problems of preservation, development and utilization of water resources for irrigation of arid land
    谈干旱地区灌木资源的保护培育和开发利用问题
短句来源
    Study and Application of the Limits of Soil Moistened in the Drip Irrigation
    滴灌土壤湿润范围的研究及应用
短句来源
    Study on water movement under trickle Irrigation
    滴灌条件下土壤水分运动规律的研究
短句来源
    ON WELL IRRIGATION CONSTRUCTION OF CHINA
    中国井灌建设刍议
短句来源
    The Distribution and Movement of Soil Nitrogenous Formsin Soil Profile under Irrigation Water
    水分淋洗下土壤各形态氮在剖面中的分布与移动
短句来源
更多       
查询“irrigation”译词为用户自定义的双语例句

    我想查看译文中含有:的双语例句
例句
为了更好的帮助您理解掌握查询词或其译词在地道英语中的实际用法,我们为您准备了出自英文原文的大量英语例句,供您参考。
  irrigation
Characteristics of root growth in a fast-growing and high-yield poplar plantation under subsurface drip-irrigation
      
'I-214') were studied under two contrasting conditions, subsurface drip-irrigation (SDI) and normal irrigation (CK), on the sandy soil of Chaobai River, Beijing.
      
The Dabieshan District is a main ecological area with a function of soil and water conservation where seven large reservoirs and irrigation systems of the Pishihang are distributed.
      
Spraying wheat seedlings with these extracts, in contrast to the irrigation of soil, markedly diminished infection in plants with powdery mildew.
      
Since infiltration arises as a result of irrigation or input from atmospheric water, it actually acts in certain seasons of the year and not all year long.
      
更多          


On the basis of a series of soil survey made in the Hwaiho Valley(淮河流域),a plan on land classification for this area has been proposed asreferences for making arrangement in establishing irrigation systems,inland utilization,as well as in soil improvement.Three fundamental principles are considered to be important on landclassification,i.e.(1)the practices in soil improvement must be consideredin connection with those in land utilization,(2)the land classificationshould be considered on land utilization...

On the basis of a series of soil survey made in the Hwaiho Valley(淮河流域),a plan on land classification for this area has been proposed asreferences for making arrangement in establishing irrigation systems,inland utilization,as well as in soil improvement.Three fundamental principles are considered to be important on landclassification,i.e.(1)the practices in soil improvement must be consideredin connection with those in land utilization,(2)the land classificationshould be considered on land utilization both of the present day and of thefuture time,and(3)the main factors and criteria adopted for landclassification must be appropriate to the particular regional conditions.The main factors used in land classification of the Hwaiho Valley aresuggested as follows:(1)soil types together with their physical andchemical properties,(2)geomorphological characteristics,(3)depth andchemical composition of ground water,(4)present status and furtherimprovement in drainage and irrigation,(5)present status in land utiliza-tion and estimate on soil productivity,and(6)fundamental problems inthe promotion of soil fertility.According to the factors just mentioned,a system of land classificationhas been proposed for the Hwaiho Valley where the land may be classifiedinto seven main types.

淮河流域土壤改良利用分区的目的是供水利方面选择灌区和初步计划灌溉设施及农业方面确定农业区划和改进农业技术措施的参考。分区的基本原则有三:第一,土壤改良必须与利用规划结合,其次分区应注意综合性、长远性和现实性,第三划区的主要因素和标准必须符合地区的特点。淮河流域土壤改良利用分区的主要参考因素为(1)土壤发生分类和主要理化性质,(2)地貌,(3)地下水的深度、矿化度及化学组成,(4)灌溉排水现状及需要改进的情况,(5)土地利用现状及对生产的评价,(6)提高土壤生产力的关键性问题。

After soil survey of the whole region,it is found that the soils of the North China Great Plain consist of four great soil groups including drab soil,light meadow soil,glei swamp soil and saline soil.The term“calcareous alluvial soils” formerly used hardly interprets any mean of soil formation and productive cha- racteristics. The drab soils formerly named as“Shangtung brown soils”are generally located on the alluvial fan and the foot of mountains.Owing to the higher relief,excess drainage and deeper ground...

After soil survey of the whole region,it is found that the soils of the North China Great Plain consist of four great soil groups including drab soil,light meadow soil,glei swamp soil and saline soil.The term“calcareous alluvial soils” formerly used hardly interprets any mean of soil formation and productive cha- racteristics. The drab soils formerly named as“Shangtung brown soils”are generally located on the alluvial fan and the foot of mountains.Owing to the higher relief,excess drainage and deeper ground water(below 4—6 meters),saliniza- tion is not found.The drab soil is neutral to slightly alkaline in reaction. The chemical data show no evidence of chemical decomposition of clay,but the disintegration of soil particles-clay formation is quite obvious.Along the foot of Taihang range,the drab soils are covered with new calcareous material and bring out the process of recalcification shown by the presence of pseudo- mycelins in the Soil profiles. Light meadow soils are generally distributed in the alluvial plain with higher ground water table laying at 2—3 meters.Owing to the frequency of the fluc- tuation of the ground water in the soil profile,oxidation and reduction are alternately carried out and lots of rusts and mottlings are found in the soil profile of these soils.Under intensive cultivation,the surface soil of light meadow soil is usually loose and mellow and contains lower content of organic matter. The glei swamp soils are formed by the lakeside and in the depressed lowlands where ground water table is quite shallow and sometimes close up to the sur- face.In the depressed lands contacted with mountain foot,longer duration of water-lodging produces strongly gleyed swamp soil with higher content of humus. In the depressed portion of alluvial plain,the temporary water-lodging gives weakly gleyed swamp soil with low content of humus,whilst the strongly gleyed soils are found in the depressed land along seacoast. Salinization of soils is influenced by the ground water and relief.Saline soils are usually distributed in the lowland with higher ground water table and higher mineral content of the water.Irrigation without drainage system will rise ground water table and causes the process of secondary salinization. Saline soils of North China plain may be divided into two subtypes:(1) Saline soil of alluvial plain and(2)Saline soils along the seacoast.The former belongs to the chloride-sulfate saline soils in which the ground water table is about 1.5—2.0 meters and the mineral content of the ground water is about 1—3 grams/liter.In the coastal region,the chloride saline soils are usually found with high ground water table at 1.0—1.5 meter and also high mineral content more than 10 grams/liter.The transitional belt between these two soils above-mentioned is sulfate-chloride saline soils where the ground water table is around 1.5 meter and the mineral content of ground water is 5—10 grams/liter. These four genetic soil types are closely related each other and also alternate between themselves.It is very interesting to study the transitional types among these four soil groups. Between drab soils and light meadow soils,the transitional soil types as meadow drab soils and drab meadow soils are formed under different transitional circumstances.The meadow drab soil is distributed at the bottom of alluvial fan with higher ground water table(1.5—3 meters),while the drab meadow soil is formed on the old riverbed in the alluvial plain with comparatively uplifting relief where the ground water table becomes deeper(3—3.5 meters). Many transitional soil types are also developed between the light meadow soils and glei swamp soils.The worse water lodging condition enforces the meadow soil transfering to glei swamp soil,whilst promotion of water condi- tion by diking drainage cannel or local silting up of lowlands causes the trans- formation of glei swamp soil in to light meadow soil or even to the drab soil. Salinization of soil is always accompanied with the formation of light meadow soil.Rising the ground water table and increasing the mineral content of ground water will induce or enforce the process of sainization of soils.On the other side,desalinization of soils can be carried out when the ground water table becomes lower.When the seatide is shut by dikes and the drainage condition is improved,the saline soil in the coastal region will be transfered to the light meadow soils.

经过一年多的大规模调查,证实了华北平原的土壤都具有不同的类型和不等程度的发育,其中包括很多土类、亚类和变种,过去简称华北平原土壤为“石灰性冲积土”,是很难反映情况和说明问题的。华北平原的主要成土过程有褐土过程、浅色草甸土过程、沼泽过程和盐土过程。褐土多发育于山麓及冲积扇形地上,地势较高,排水良好,地下水埋藏较深,约在4—6米以下。在降水淋洗之下,可溶盐类皆被淋失,不发生盐演化现象,土壤只及于粘化作用,pH 值多属中性至微碱性。太行山麓的褐土因受石灰性沉积物的覆盖,发生次生碳酸盐化作用,土壤剖面中有假菌丝体存在。浅色草甸土多分布于冲积平原,其形成过程受地下水的影响极显著。地下水埋藏深度约2—3米,也可达4—5米。由于地下水升降频繁,氧化还原作用交替进行,土壤中呈现显明的锈纹斑,但无假菌丝体。土壤疏松多孔而有结构性,因土壤中有机质较少、土色浅淡而多受人为耕作的影响,故称耕种浅色草甸土。洼地及湖淀附近,地下水埋藏较浅或地表积水,土壤发生沼泽化过程。山麓交接洼地,积水时期长久,潜育作用及腐殖质积累均较显著。平原中洼地比较平坦,积水时间亦较短,腐殖质积累和潜育作用都较轻微。海滨洼地中,潜育作用较为剧烈,但有机质的积累则...

经过一年多的大规模调查,证实了华北平原的土壤都具有不同的类型和不等程度的发育,其中包括很多土类、亚类和变种,过去简称华北平原土壤为“石灰性冲积土”,是很难反映情况和说明问题的。华北平原的主要成土过程有褐土过程、浅色草甸土过程、沼泽过程和盐土过程。褐土多发育于山麓及冲积扇形地上,地势较高,排水良好,地下水埋藏较深,约在4—6米以下。在降水淋洗之下,可溶盐类皆被淋失,不发生盐演化现象,土壤只及于粘化作用,pH 值多属中性至微碱性。太行山麓的褐土因受石灰性沉积物的覆盖,发生次生碳酸盐化作用,土壤剖面中有假菌丝体存在。浅色草甸土多分布于冲积平原,其形成过程受地下水的影响极显著。地下水埋藏深度约2—3米,也可达4—5米。由于地下水升降频繁,氧化还原作用交替进行,土壤中呈现显明的锈纹斑,但无假菌丝体。土壤疏松多孔而有结构性,因土壤中有机质较少、土色浅淡而多受人为耕作的影响,故称耕种浅色草甸土。洼地及湖淀附近,地下水埋藏较浅或地表积水,土壤发生沼泽化过程。山麓交接洼地,积水时期长久,潜育作用及腐殖质积累均较显著。平原中洼地比较平坦,积水时间亦较短,腐殖质积累和潜育作用都较轻微。海滨洼地中,潜育作用较为剧烈,但有机质的积累则不一致,水浅处的有机质积累较多。因地形及地下水的情况不同,土壤盐渍程度各地不一。盐渍土多发生于山前交接洼地、碟形洼地边缘,以及槽状洼地和地上河流的两侧。有些灌区由于缺乏合理的灌排系统和灌溉制度,土壤发生了次生盐演化现象。华北平原盐渍土可分为内陆及海滨两种:内陆盐渍土多属氯化物硫酸盐土,地下水埋藏深度约1.5—2.0米,地下水矿化度约1—3克/升;海滨盐土区多属氧化物盐土,地下水埋藏深度约1.0—1.5米,地下水矿化度大于10克/升;过渡地带(即海滨盐土与内陆盐土的过渡地带)的盐渍土多属硫酸盐氯化物盐土,地下水埋藏深度约1.5米左右,地下水矿化度5—10克/升。华北平原中的四个主要成土过程是互相联系,而且有过渡阶段的。褐土和浅色草甸土的形成条件,主要在于排水情况和地下水位的不同。所以这两种土壤分布毗鄰而有互相过渡的发展情况。扇形地中下部,地面排水尚好而地下水埋藏较浅(1.5—3米),褐土区中可发育浅色草甸褐土。在泛盐平原中地势相对高起的黄河故道或靠近冲积扇地区,地下水埋藏较深(3.5—5米),可发育褐土化浅色草甸土。泛溘平原中的洼地积水愈久,沼浑化过程愈强,可由沼泽化浅色草甸土过渡至浅色草甸沼泽土或沼泽土。但经人工挖沟排水或洼地淤平以后,土壤可由沼泽土转向浅色草甸过程或褐土过程发展。浅色草甸土中如地下水埋藏浅而矿化度高,则土壤可向盐土方向发展。海滨盐土如不再受海潮影响和改善排水情况,则土壤也可由盐土向浅色草甸土发展。

Present paper deal with the results of lysimeter studies on soil conditions under varying rates of water percolation.Effect of soil permeability,as governed by rate of percolation, on redox potential of soils,composition and properties of drained water in relation to rice growth has been investigated.Obtained results reveals following facts. 1.Translocation of nutrients in soil profile is accompanied by the movement of per- colating water under irrigation and drainage system.The content of oxygen in irrigation...

Present paper deal with the results of lysimeter studies on soil conditions under varying rates of water percolation.Effect of soil permeability,as governed by rate of percolation, on redox potential of soils,composition and properties of drained water in relation to rice growth has been investigated.Obtained results reveals following facts. 1.Translocation of nutrients in soil profile is accompanied by the movement of per- colating water under irrigation and drainage system.The content of oxygen in irrigation water results an elevation of soil redox potential,and gives benifical effect to rice growth. 2.Accumulation of toxic substances under reduced condition of paddy soils definidy restricts root development of rice plant.The constant percolation system of paddy field, however,has hastening the renoval of these toxic substances. 3.Excessive drainage of irrigation water induces loss of soil nutrients.It is surely also a poor practice in regard to the economical use of irrigation water. Present investigation gives the evidence that a poorly drained condition induces the accumulation of toxic substances in paddy soils,while excessive drainage,on the other hand, depriyes soil nutrients through leaching,both of which result decreases of the yield of rice plant.An adquate system of percolation,with average rate of 13 mm.of water per 24 hrs. or 893 mm.throughout the growing period of rice plant,has been proved enable to give high yield of rice under present experimental condition.

1.试验结果表明,水稻的土壤环境宜常予更新,否则由于耕层土壤中氧气的缺少和有害物质的积累,对水稻产生不良的影响。在实践中除了一些人为措施以更新土壤环境外,工壤所具有的渗漏性能,在土壤环境更新中也起一定的作用。2.由于土壤具有渗漏性能,这样就引起了灌溉水向土层中的渗漏,从而带入了氧气和养分,促进了土层中养分的分配和移动,也稀释和排出了耕层土壤中的养分和有害物质,对土壤环境起着更新的作用。在这些作用中可分有利的和不利的两个方面,这两个方面的相对大小和转化,受到渗漏速度的制约。3.渗漏速度过慢和过快都对水稻生长产生不利的影响。渗漏速度过快虽有利于毒害物质的排除、氧气的输入等,但用水不经济,养分流失过多,反而易于引起水稻生长后期的脱肥。反之,渗漏速度过慢虽可减少水分和养分的流失,但由于毒害物质不能得到排除,也抑制了根系的活动,削弱了地上部分的生长。

 
<< 更多相关文摘    
图标索引 相关查询

 


 
CNKI小工具
在英文学术搜索中查有关irrigation的内容
在知识搜索中查有关irrigation的内容
在数字搜索中查有关irrigation的内容
在概念知识元中查有关irrigation的内容
在学术趋势中查有关irrigation的内容
 
 

CNKI主页设CNKI翻译助手为主页 | 收藏CNKI翻译助手 | 广告服务 | 英文学术搜索
版权图标  2008 CNKI-中国知网
京ICP证040431号 互联网出版许可证 新出网证(京)字008号
北京市公安局海淀分局 备案号:110 1081725
版权图标 2008中国知网(cnki) 中国学术期刊(光盘版)电子杂志社