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土壤次生
相关语句
  soil secondary
     REGIONAL WATER-SALT MOVEMENT AND PREDICTION OF SOIL SECONDARY SALINIZATION(SSS)
     “一线两湖”地区水盐状况与土壤次生盐渍化的预测
短句来源
     WATER-SALT TRANSFER RULE RESEARCH IN SOIL SECONDARY SALINIZATION
     土壤次生盐渍化之水盐运动规律研究
短句来源
     Soil secondary salinization can be considered as the main factors that influence the stability of new oasis in alluvial plain.
     土壤次生盐渍化是影响冲积平原新绿洲稳定性的主要因素。
短句来源
     Modeling and Forecasting of Soil Secondary Salinization in Songnen Plain
     松嫩平原土壤次生盐渍化过程模型研究
短句来源
     Water Resources Development and Control of Soil Secondary Salinization in Yanqi Basin
     焉耆盆地水资源开发与土壤次生盐碱化防控研究
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  “土壤次生”译为未确定词的双语例句
     (3)secondary salinization;
     (3)土壤次生盐渍化程度趋重;
短句来源
     (5) Despite mulched or not, after irrigated with saltish water, soil water and salt movement concluds three obvious stages: Evaporation and salt accumulation in spring, Precipitation and eluviation in summer and Evaporation and salt accumulation in autumn.
     (5)不同矿化度微咸水灌溉的土壤水盐运动具有明显的三个阶段,即春季蒸发—积盐阶段、夏季降水—淋洗脱盐阶段和秋季蒸发—积盐阶段,这便于根据不同阶段防止微咸水灌溉可能产生的土壤次生盐渍化采取相应措施。
短句来源
     The further research has demonstrated that soil alkalization in Tianjin result from soil desalting ,underground soda water and irrigation with lower mineralized alkali water.
     进一步研究证明盐土脱盐过程中的脱盐碱化、苏打型地下水引起的土壤碱化,以及碱性水灌溉造成的土壤次生碱化是天津地区土壤碱化的主要原因。
短句来源
     (5)salinity and alkalinity of the wastewater decrease at 1.07~1.19 g/L and 7.07~10.13 mmol/L, respectively.
     系统废水的盐分质量浓度降至1.0 g/L左右,碱浓度低于水源(7.0~10.0 mmol/L)。 该模式不会造成土壤次生盐碱化。
短句来源
     Nutrient migration and soil salinisation are the two major concerns in the research of soil solute transport.
     土壤养分运移和土壤次生盐碱化都是土壤溶质运移领域研究的主要内容,而且土壤养分运移研究起源于土壤水盐运动的研究理论。
短句来源
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  相似匹配句对
     A SURVEY OF THE SECONDARY SALINIZATION OF SOIL IN GREENHOUSE
     温室土壤次生盐渍化的研究
短句来源
     Analysis of Secondary Salinization of Soil in Jingtai lrrigation Area
     景泰灌区土壤次生盐渍化浅析
短句来源
     soil productivity;
     土壤生产力;
短句来源
     Machine Proccessing of Remotely Sensed Data and Soil Information Systems and Remote Sensing and Sail Survey
     土壤遥感
短句来源
     SECONDARY COLOUR OF JADEITE JADE
     翡翠的次生
短句来源
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防止土壤盐碱化的发生与扩展,是目前黄河下游灌区保证农业增产的重要措施.我们研究了灌区土壤盐分与地下水动态的关系,分析了灌区土壤次生盐碱化发生的地下水条件,提出了保证作物丰产和防止次生盐碱化的地下水控制标准、控制制度和以灌溉、排涝为中心环节的综合防止措施.本文基于“毛细管破裂点”的概念,建议以强烈毛细管上升高度来确定地下水临界深度,其数值比过去减少大约一半,而且改变了重质土的地下水临界深度大于轻质士的传统看法.本文系这项工作的研究报告的一个缩写.

Investigation and field experiment on the water and salt regime of paddy soils were carried out in the depression area along the Yellow River in Fengqiu county, Honan Province. The results obtained are as follows:

我们从1976年开始,在河南省封丘县进行了关于黄河背河洼地低矿化地下水条件下的稻区水盐状况方面的调查和定位试验,试验结果表明: 1.背河洼地地下水矿化度不高,土壤应该不容易盐渍化,但由于主要为轻壤土和砂壤土,毛管传导性强,盐分向地表累积,产生盐害。种稻之所以能改良盐渍土,是因为稻田淹灌水,有淋洗土壤盐分和淡化地下水的作用。2.稻田灌水引起周围地下水位抬高,是稻田周围土壤次生盐渍化的主要原因。次生盐渍化由稻田附近向外发展,一方面是由于稻田边缘的地下水位比远处为高,土壤返盐快。另一方面是因为稻田周围土壤水分存在着水势梯度、水盐由稻田附近总水势高的地方,向远处总水势低的地方移动和累积。3.背河洼地排水困难,地下水位浅,稻田回旱以后,轻质土容易返盐。引黄放淤,地表淤积粘土,粘土层有很好的抑制返盐作用。粘土愈厚,返盐愈慢。4.灌排渠系是调控稻区水盐运行的重要措施,背河洼地排水系统由临时毛排以及农排与支排组成。毛排和农排主要是配合灌渠调节水分,排盐作用不大,深度和间距可以适当放宽。支排有排盐和排地下水作用,对土壤改良影响很大,深度不宜过浅,间距亦不可过大。水旱交界处布置深而通畅的截渗沟,对防治稻田周围盐渍化有...

我们从1976年开始,在河南省封丘县进行了关于黄河背河洼地低矿化地下水条件下的稻区水盐状况方面的调查和定位试验,试验结果表明: 1.背河洼地地下水矿化度不高,土壤应该不容易盐渍化,但由于主要为轻壤土和砂壤土,毛管传导性强,盐分向地表累积,产生盐害。种稻之所以能改良盐渍土,是因为稻田淹灌水,有淋洗土壤盐分和淡化地下水的作用。2.稻田灌水引起周围地下水位抬高,是稻田周围土壤次生盐渍化的主要原因。次生盐渍化由稻田附近向外发展,一方面是由于稻田边缘的地下水位比远处为高,土壤返盐快。另一方面是因为稻田周围土壤水分存在着水势梯度、水盐由稻田附近总水势高的地方,向远处总水势低的地方移动和累积。3.背河洼地排水困难,地下水位浅,稻田回旱以后,轻质土容易返盐。引黄放淤,地表淤积粘土,粘土层有很好的抑制返盐作用。粘土愈厚,返盐愈慢。4.灌排渠系是调控稻区水盐运行的重要措施,背河洼地排水系统由临时毛排以及农排与支排组成。毛排和农排主要是配合灌渠调节水分,排盐作用不大,深度和间距可以适当放宽。支排有排盐和排地下水作用,对土壤改良影响很大,深度不宜过浅,间距亦不可过大。水旱交界处布置深而通畅的截渗沟,对防治稻田周围盐渍化有一定的效果。5.背河洼地种稻时还必须考虑:(1)根据灌排条件,确定种稻面积;(2)井渠结合,以井水补河水之不足,井灌并有排水作用;(3)稻改与引黄放淤结合,上游放淤,下游稻改;(4)稻田连片布置,减少对旱地的不良影响。

The South-to-north water transfer is a magnificent project in China, which brings excess water from the Yangtze River in the south to the arid areas of North and Northwest China. The proposed East Transfer Route would pass through and supply water to the Huang-Huai-Hai plain,The liuang-Huai-Hai plain is a weakly or easily salinized region . Owing to the influence of the pacific monsoon, this region has always been suffered from disasters of drought, flooding, salinization and alkalization throughout the history....

The South-to-north water transfer is a magnificent project in China, which brings excess water from the Yangtze River in the south to the arid areas of North and Northwest China. The proposed East Transfer Route would pass through and supply water to the Huang-Huai-Hai plain,The liuang-Huai-Hai plain is a weakly or easily salinized region . Owing to the influence of the pacific monsoon, this region has always been suffered from disasters of drought, flooding, salinization and alkalization throughout the history. Under this specific natural condition and human activity , sail salt-water movement is significantly characterized by seasonal changes. Soil is in the process of modern salinization,only varying in degrees of salt accumulation with location and times. Therefore, in the design and implement of the South-to-north Water Transfer, attention should be paid to the control of soil salinization .Alter the water is transferrer, the irrigation area in the Huang-Huai-Hai plain will be enlarged. There will be a beneficial effect on improving water condition of this region, leaching soil salt and promoting agricultural production. At the same time, the present salt-water balance of the region will be changed. The districts with poor natural drainage and without artifical drainge system might be confronted with secondary soil salinization.If the four lakes in the south of the Huang-He are used as regulation reservoirs in the South-to north Water Transfer project, then the elevation of the original storage level of the lakes will have a definite effect on the drainage of the main channels in the west of the four lakes and on soil salinization.From a long-term point of view, it is necesary to dig deep trough or to deepen the bottom of the lakes to meet the requirment of storage capacity and storage level of the lakes. In addition, the channel of drainage flooding and controlling seepage should be excavated along the west side of the four lakes, to reduce and control groundwater level of the region along the lakes, at the same time, pumping drainage station should be established at the outlet of the main drainage channel, to settle drainage outlet and increase capacity of drainage flooding.The conveyance of water for a long period of time in the main canals, especially in the stretches where the level of transported water is higher than the land surface, would lead to the formation of high-water-table zones on both sides of the canals, owing to a large amount of seepage of canals. The groundwater runoff in the left side of the main canals would impede in varying degrees and block the drainage of underground runoff and might lead to a general increase of the level of groundwater and aggravate soil salinization along the canal. Both an adequate engineering drainage system of controlling or intercepting seepage and an agricultural technique should be considered. At the same time, a scientific management system for the supply of transferred water should be worked out. So long as more attention is paid and appropriate and reasonable measures of water management, agricultural and engineering system are adopted, soil salinization could be prevented or controlled.

本文简要分析了南水北调东线输水工程实施后可能引起黄淮海平原土壤次生盐渍化的原因,并提出了相应的防止措施。

 
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