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次生盐渍
相关语句
  secondary salinization
     Only if we can understand the rules of water and salt movement in the soil, can we control the secondary salinization, and achieve the sustainable development of this area.
     最后指出人为经济活动影响的重要性,针对土壤水盐运移的规律,提出控制以及改良次生盐渍土的几条措施。
  “次生盐渍”译为未确定词的双语例句
     The secondary saline soils are mainly distributed in the piedmont slope zone,high terrace and high valley flat in Xining area.
     西宁地区次生盐渍土主要分布于山麓斜坡带高阶地和河谷高漫滩,前者属中~弱硫酸、亚硫酸盐渍土,且多具中等~强烈湿陷性,盐份主要来自斜坡后缘含盐碎屑岩风化物及易溶盐;
短句来源
     DISTRIBUTION OF SECONDARY SALINE SOILS AND METHODS OF GROUND CONSOLIDATION IN XINING AREA
     西宁地区次生盐渍土的分布特征及地基处理方法
短句来源
     Salinized soil is a serious problem of desert area, which harms seriously agriculture, livestock husbandry and traffic construction.
     盐渍土是荒漠地区的重要问题,它在绿洲农业、畜牧业、交通建设等方面都造成极大的危害. 荒漠地区不仅有原生盐渍土,而且有随着荒漠的垦植、不当的灌溉造成的大片的次生盐渍土,仅甘肃而言就有二百多万亩.
短句来源
     Therefore, the secondary saline-alkaline soil in grassland had its special profile and physical and chemical characterstics.
     草地次生盐渍土具有其独特的剖面形态和理化性质。
短句来源
     The cause, characteristics and some control methods of the secondary saline soil in greenhouse are reviewed in this article.
     本文对保护地次生盐渍土的特性、成因及防治措施进行了综合评述。
短句来源
更多       
  相似匹配句对
     A NEW APPLICATION OF AIRBORNE ELECTROMAGNETIC METHODSTO SOIL SALINITY MAPPING
     航空电磁法应用的新领域——盐渍土及次生盐渍化调查
短句来源
     DISTRIBUTION OF SECONDARY SALINE SOILS AND METHODS OF GROUND CONSOLIDATION IN XINING AREA
     西宁地区次生盐渍土的分布特征及地基处理方法
短句来源
     SECONDARY COLOUR OF JADEITE JADE
     翡翠的次生
短句来源
     The Secondary Metabolism of Plant
     植物次生代谢
短句来源
     STUDY ON THE SALINE SOIL FOUNDATION TREATMENTS
     盐渍土地基的处理方法
短句来源
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  secondary salinization
On irrigated ground with poor natural drainage, artificial drainage is used to prevent secondary salinization and swamping.
      
Two hundred forty-three isolates of alfalfa root-nodule bacteria (Sinorhizobium meliloti) were obtained from nodules and soils sampled in the northern Aral region, experiencing secondary salinization.
      
Soil salinity is the most important factor affecting vegetation distribution, and the secondary salinization has affected the development of oasis agriculture.
      
When undisturbed by human, the groundwater table rises from mountain to belt of ground water spillage, the groundwater table rises mightily in plain because of the artificial irrigation, and the secondary salinization of soil is very serious.
      
The new oasis has been the areas of salt accumulation because of the artificial irrigation, the salt content in soil is higher than that in old oasis, so some cultivated fields here had to be thrown out because of the serious secondary salinization.
      
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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...

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。

Salinized soil is a serious problem of desert area, which harms seriously agriculture, livestock husbandry and traffic construction. In desert area there is not only primary salinized soil but also secondary one produced by planting or irrigating unreasonably .Only in Gansu Province, the area of salinized soil is more than 1.334×106 hectares and 80 percent of it distributed in the Gansu Corridor.

盐渍土是荒漠地区的重要问题,它在绿洲农业、畜牧业、交通建设等方面都造成极大的危害.荒漠地区不仅有原生盐渍土,而且有随着荒漠的垦植、不当的灌溉造成的大片的次生盐渍土,仅甘肃而言就有二百多万亩.其中百分之八十分布在河西走廊地区,严重地危害着该地区农业生产的发展和人民生活水平的提高.由于荒漠地区干旱缺水,自然条件恶劣、生态平衡脆弱,在这类地区以水灌冲洗法为主开展治理工作将是不适宜的,而从农田生态学的角度探讨土壤盐分危害作物的机理,因地制宜的选择种植抗盐、耐盐作物,将是荒漠地区开发利用盐渍土的主要途径。本文尝试以张掖、民勤、酒泉等地实验统计的土壤盐分与小麦产量的数据为例,就土壤盐类危害作物的主要因素、单盐因素对作物产量的影响,盐类集合对作物的制约作用等问题进行数量分析,提出了优化利用策略 期望有益于耐盐作物的选择和荒漠地区盐渍土的整治利用.

 
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