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soil secondary
相关语句
  土壤次生
     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
短句来源
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  “soil secondary”译为未确定词的双语例句
     When the SAR of inigahon water was more than 14, and the salt content was more than 3.0g / L or 4.0g / L, the growth and yield of soybean and wheat were influenced, a medium or strong soil secondary alkalization occurred.
     当灌溉水钠吸附比大于14,矿化度大于3g/L和4g/L时,大豆和小麦生长和产量受到影响,土壤出现中度或强度次生碱化。
短句来源
     Effect of Soil Secondary Salinization on the Growth and Development of Several Crops
     油田次生盐渍化土对几种作物的影响
短句来源
     Improving the production capacity of land, utilizing the land of salinization, and preventing the soil secondary salinization, have already become one important respect of the sustainable utilization of land resources and agricultural development.
     提高现有土地生产能力,改良与开发利用盐碱化土地以及防治土壤的次生盐碱化,已成为实现土地资源可持续利用和农业可持续发展的一个重要方面。
短句来源
     Soil Secondary Salinization is one of the major factors which are seriously affecting plant growth and development in greenhouse.
     次生盐渍化是造成保护地土壤障碍的主要因素之一。
短句来源
     The results show that the soil secondary salinization is a main process of the land desertification in this region during the past 34 years,which followed the sandy desertification and water erosion.
     结果表明:34a来,三工河地区土地荒漠化以盐渍化为主、沙漠化及水土流失次之;
短句来源
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  相似匹配句对
     Control of Secondary Salinization of Greenhouse Soil
     大棚蔬菜土壤次生盐渍化无害化综防技术研究
短句来源
     THE PROBLEM OF SECONDARY GLEIZATION OF PADDY SOIL
     关于水稻土的次生潜育化问题
短句来源
     ⑥soil.
     ⑥土壤因素。
短句来源
     The secondary disaster
     二次灾难
短句来源
     soil fertility;
     土壤肥力;
短句来源
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Summary According to the chemical and x-ray diffraction analysis a remarkab- le difference was noticed ia the clay mineral formation of the four kinds of soil in Yanbian area,Though the main clay minerals forming the strata in the profile of the same soil secondary and accumpanying minerals showed certain difference,Dark brown earth,upland soil have illite and vermi- culite as their main clay minerals,meadow soil has montmorillonite,Ver- miculite fluvitype rice soil has montmorillonite...

Summary According to the chemical and x-ray diffraction analysis a remarkab- le difference was noticed ia the clay mineral formation of the four kinds of soil in Yanbian area,Though the main clay minerals forming the strata in the profile of the same soil secondary and accumpanying minerals showed certain difference,Dark brown earth,upland soil have illite and vermi- culite as their main clay minerals,meadow soil has montmorillonite,Ver- miculite fluvitype rice soil has montmorillonite as their main clay minerals The content of free on,amorphous iron,the freedom and activity of iron in upland soil are greater than those in dark brown earth,and those in dark brown earth are greater than those in meadow soil which reve- als some influence of environmental factors on Soil formation:the indexes of iron cxide crystals in the full profiles of the three kinds of soil are basically similar.Under the similar biological and climate conditions the difference of clay minerals is mainly caused by terrain and parent material.

化学分析和 X-射线衍射分析结果表明:吉林省延边地区四种主要土壤的粘土矿物组成差异很大,同一土壤剖面发生层次的主要粘土矿物虽然基本相似,但是次要及伴随矿物则有所差异.暗棕壤、白浆土的主要粘土矿物为伊利石、蛭石;草甸土为蒙脱石、蛭石;冲积型水稻土为蒙脱石。游离铁、无定形铁的含量及铁的游离度、活化度为白浆土>暗棕壤>草甸土,反映了某些成土环境对土壤发生的影响;三种土壤的氧化铁结晶指数在全剖面中基本相似.在生物气候条件大体相同的情况下,引起粘土矿物差异主要与地形、母质有关。

Afforestation of poplar in arid zones by irrigation can protect farmland and prevent windburn as well as drain off ground water by transpiration of trees which can avoid the soil secondary saline-alkalizing, provide timber and benefit the terms of ecology. Arid zones are perpetually short of water, so developing poplar forest must increase income and decrease expenditure of water, utilize it resaonably, accomplish balance between water and land. Planting poplar belted along the sides of irrigation ditch...

Afforestation of poplar in arid zones by irrigation can protect farmland and prevent windburn as well as drain off ground water by transpiration of trees which can avoid the soil secondary saline-alkalizing, provide timber and benefit the terms of ecology. Arid zones are perpetually short of water, so developing poplar forest must increase income and decrease expenditure of water, utilize it resaonably, accomplish balance between water and land. Planting poplar belted along the sides of irrigation ditch where if there is non-protection against seepage. This side, especilly the inside slope of irrigation ditch has enough soil water for trees to grow without special irrigation, using manpower, earth and water sparingly. Therefore, this sites are the major places for poplar's afforestation in arid-irrigated farmlands which have great potentialities. Afforestation of poplar by irrigation at some stretched lands which abounded with water and earth resources are also an important way in arid zones. Euphrates poplar(populus euphratica ) is a major species at saline and alkaline soil in arid zones where it occupies a major place. At summer draw the rich flood to the natural forest to promote it regeneration and growth by natural seeding, sprouting and rejuvenation. At present,owing to the afforested site unsuitable, planted too close, managed extensively, harmed by diseases and insect or stocks, especially irrigated insufficiently, the forest of poplar is relatively poor in many arid zones. In future, these problems must be surmounted so that can be developed more well and quickly.

干旱地区杨树灌溉造林可以防风护田、生物排水、提供木材和其他林副产品、改善人类的生态环境,具有重要的意义。干旱地区水分不足,通过灌溉可以发展杨树,但必须开源节流,合理用水,做到水土平衡。沿渠带状造林省水省地省工,林木生长好,效益高,应作为主攻方向,水土条件好的地方可以发展杨树片林,此外,胡杨的引洪灌溉造林和盐碱地造林也很有发展前途。当前干旱地区杨树灌溉造林的水平不高,生长量低,还有相当大的潜力,除管好现有林木,促进生长,提高质量外,今后发展中必须注意克服以往造林中选地和造林技术不当、树种单纯、造林过密、管理粗放、灌水不足、牲畜及病虫危害等问题。本文在调查研究和田间试验的基础上,结合有关资料,对干旱地区杨树灌溉造林中的一些问题进行初步的探讨。

For the first time to expose the so? secondary salinization appeared in the Tibet plateau area——the roof of the world is a kind of stimulation for the international or domestic academic circles.This article illustractes emphatically the existing state, the reasons to produce soil secondary salinization in the Tibet area as well as preventing measure. It is the result for the author to have ever been in Tibet to investigate and test for a year, it is very real and believable.

首次对世界屋脊——西藏高原地区出现土壤次生盐碱化问题进行披露,对国际、国内有关学术界也是一种启示.文内重点对西藏高原地区土壤次生盐碱化的现状,产生次生盐碱化的原因以及防治措施进行了阐述.本文系作者在西藏工作一年间的实地考察和测试结果.资料真实可靠.

 
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