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次生盐化
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  “次生盐化”译为未确定词的双语例句
     THE WATERHEAT-SALT MOVEMETN OF SOIL WATER AND AN ANALYSIS OF SOIL SALINITY
     土壤水的水、热、盐运动及次生盐化的分析
短句来源
     The Experiment on the Introduction of Pinus sylvestris var. mongolica in Secondary Saline Soil of Northwestern Irrigation Area
     西北灌区次生盐化土樟子松引种试验
短句来源
     Properties and genetic mechanisms of the secondary salinized soils in Jingdian irrigation area of Gansu Province
     甘肃景电灌区次生盐化土壤的性质及其发生机理
短句来源
     With the background of soil salinity in the plain of North China, a water-heat-salt movement of soil water in unsaturated-saturated region is studied by numerical simulation.
     本文以我国北方平原的土壤次生盐化为背景,对土壤中饱和—非饱和水的水—热—盐一维运动模型进行了数值模拟。
短句来源
     It may be concluded that at present apart from a certain region subject to thesoil salinization of the “one line and two lakes” areas,there are deeper buried phreaticwater,good drainage conditions,and less salt in the soil in most of the area,but it is threat-ened by the potential secondary saline and alkali.
     认为该区除局部地段受土壤盐渍化威胁外,大部分地区潜水埋藏较深,排水条件良好,土壤含盐量不大,但存在着潜在次生盐化和碱化的威胁。
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  相似匹配句对
     The Experiment on the Introduction of Pinus sylvestris var. mongolica in Secondary Saline Soil of Northwestern Irrigation Area
     西北灌区次生盐化土樟子松引种试验
短句来源
     THE WATERHEAT-SALT MOVEMETN OF SOIL WATER AND AN ANALYSIS OF SOIL SALINITY
     土壤水的水、热、盐运动及次生盐化的分析
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
     THE OXIDIZING ROASTING OF CHROMITE WITH SODA
     铬铁矿的钠盐化焙烧
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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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Diverting water from south to north (DWSN) being planned at precent is a large project of diverting water crossing different basins in China.The Liang-Ji canal is a section of the arterial canal for conducting water in the east line of the DWSN.In order to study thewater-salt change in soil and underground water after diversion and to study the influenceof SSS in the area along the arterial canal,the soil and groundwater were surveyed and thewater-salt movement in the area along the Liang-Ji Canal was inverstigated.The...

Diverting water from south to north (DWSN) being planned at precent is a large project of diverting water crossing different basins in China.The Liang-Ji canal is a section of the arterial canal for conducting water in the east line of the DWSN.In order to study thewater-salt change in soil and underground water after diversion and to study the influenceof SSS in the area along the arterial canal,the soil and groundwater were surveyed and thewater-salt movement in the area along the Liang-Ji Canal was inverstigated.The key tothe success of the project lies in the variation of the agro-ecological conditions and the pos-sibility of SSS in a certain range along the transferring water line and the irrigation area tobe developed.The results of the survey and research carried out in the past few years are re-ported.The information is given on the water-salt movement in the soil observed at 140 fix-ed points in three monitering areas of the Jinxing,Jiaxing and Liangshan covering800km~2 of land,as well as 400km~2 predicted range.The fundamental regularities of regional water-salt movement in the area of the Liang-Ji Canal of the DWSN,the geochemistry of the soil salinization,the characteristics of the hydro-chemistry and theirinterrelations are described.A comprehensive evaluation and analysis are given of the influ-ence of national environmental conditions and artificial factors of the regional water-saltmovement.It may be concluded that at present apart from a certain region subject to thesoil salinization of the “one line and two lakes” areas,there are deeper buried phreaticwater,good drainage conditions,and less salt in the soil in most of the area,but it is threat-ened by the potential secondary saline and alkali.

南水北词是我国正在进行规划的一项巨大的调水工程。梁济运河是南水北调东线输水总干渠的一段。为研究输水干渠沿线地区调水后可能引起的土壤地下水水盐变化和次生盐渍化的影响,我们对梁济运河沿线及南四湖、东平湖以西地区,进行了土壤和地下水调查及水盐运动的定位观测研究。预测研究表明,调水工程的成败,关键是沿线地区一定范围和发展灌溉地区农业生态条件的变化优劣与上壤次生盐溃化的可能性。本文论述了区域水盐状况及土壤盐渍地球化学与水化学特征及其相关性,并对影响区域水盐运动的自然条件及人为因素进行了综合评价与分析。认为该区除局部地段受土壤盐渍化威胁外,大部分地区潜水埋藏较深,排水条件良好,土壤含盐量不大,但存在着潜在次生盐化和碱化的威胁。

Effect of irrigation water quality on soil chemical characterishcs and on cropgrowth was studied in this work. The salt content and sodium adsorption raho (SAR) of irrigation water were considered to be two main indexes which were combined in the 16 treatments of itrigahon water quality in the experimenL Results showed that salts of irrigahon water were accumulated and leached altemately in the soil. Whensalt content of irrigation water was below 3.0g / L, the salt was kept balanced in soil profile. When the...

Effect of irrigation water quality on soil chemical characterishcs and on cropgrowth was studied in this work. The salt content and sodium adsorption raho (SAR) of irrigation water were considered to be two main indexes which were combined in the 16 treatments of itrigahon water quality in the experimenL Results showed that salts of irrigahon water were accumulated and leached altemately in the soil. Whensalt content of irrigation water was below 3.0g / L, the salt was kept balanced in soil profile. When the salt content of itrigation water was more than 3.0g / L, the salt was accumulated in the soil, even resulting in the medium secondary salinizahon. High SAR and high Na2CO3 in irrigation water can cause Ca2+ and Mg2+ to form sediment of CaCO3 and MgCO3 to decrease Ca2 + and Mg2 + concentrahon and to increase Na+concentrahon in the soil soluhon. Thus SSP, SDR and SAR were risen. As a result ESP increased in the soil. 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.

本文以灌溉水矿化度和钠吸附比(SAR)为两个主要指标,组合成16个灌溉水质处理,研究了不同灌溉水质对土壤化学性质和作物生长的影响,初步提出了引起盐害和碱害的灌溉水矿化度和纳吸附比的临界值。研究结果表明,灌溉水带入土壤的盐分在土壤中累积与林洗交替进行。当灌溉水矿化度小于3g/L时,土壤剖面中的盐分处于平衡状态,超过3g/L,则有不同程度积盐,甚至发生中度次生盐化。灌溉水高钠吸附比(SAR)和高碳酸钠含量,可能引起土壤溶液中钙、镁离子因生成碳酸钙镁沉淀而使其浓度降低,钠离子浓度相对增加,从而促使可溶性钠百分率(SSP),钠钙镁比(SDR)和钠吸附比(SAR)升高,最终导致土壤交换性钠百分率(ESP)增加。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。

The secondary salinezed soils in Jingdian irrigation area were investigated. The salinized soils were classified as the types of chloride-sulfate and sulfate-chloride and water soluble cations were mainly sodium in the soils. Ca carbonate contents in the whole profiles were high and a low amount of gypsum was found. The saturation of Na was also high, thus the soils were solonized by sodium and the solonization was accompanied by salinization.

本文对甘肃景电灌区次生盐化土壤的理化性质进行了研究 .该区次生盐渍化土壤主要为硫酸盐氯化物和氯化物硫酸盐型 ,水溶性钠离子在阳离子中占绝对优势 .土壤通体碳酸钙含量很高 ,并有少量的石膏 .钠离子饱和度很高 ,具有钠质特性或钠质化现象 ,盐化与钠质化同时进行 .在此基础上对次生盐渍化的机理和改良进行了讨论

 
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