1) alkaline soil
碱土
1.
By the field experiment,the changes of eigenvalues such as salt-composition、pH、alkalinity、permeability and hardness of soil in the process of improving alkaline soil with desulfurized gypsum were investigated.
本文通过田间试验,研究了脱硫石膏在改良碱土过程中对碱土特征值(盐分组成、pH值、碱化度、土壤渗透性及硬度)的影响。
2) alkaline earth
碱土
1.
China is rich in rare earth and alkaline earth elements.
结合我国富有资源稀土和碱土,介绍了稀土和碱土在镁合金中的作用和影响,概括了它们在Mg-Al系耐热镁合金中的应用现状,以及在研制汽车用耐热镁合金中所发挥的重要作用。
3) sodic soil
碱土
1.
On the bases of simulation experiments in laboratory,the effects of sand fragments and sand sizes on saturated hydraulic conductivity(Ks10) of sodic soil,electrical conductivity(EC) and pH of leachates were investigated,and relationships between Ks10 and EC of leachates,Ks10 and pH of leachates were established.
为探求碱土饱和导水率与出流液电导率及pH之间的关系,采用室内模拟实验对含沙粒碱土的饱和导水率、出流液电导率及pH进行测定,分析了沙粒添加量和粒径对碱土饱和导水率、出流液电导率及pH的影响。
4) alkali soil
碱土
1.
The results indicated that the soil total salt at the research area was generally less than the saline target (<5 g/kg),the total alkalioity was bigger than alkali soil target(>2.
结果表明:研究区梭梭林立地土壤具有总盐含量普遍小于盐化指标(<5 g/kg)、总碱度大于碱土指标(>2。
5) alkaline-earth metals
碱土
1.
The characteristics of deoxidization of alkaline-earth metals-contained compound alloys has been introduced in this paper, conclusion can be drawn that it will be promising developing alkaline-earth metals-contained alloys which can be applied in purified steel manufacture.
介绍了碱土复合合金的脱氧特性,指出开发适用于纯净钢的碱土金属复合合金有重要的应用价值。
2.
The practice shows that the control and refinment are selected to produce pure alkaline-earth metalscompound alloys.
指出杂质的控制与精炼是生产纯净碱土复合铁合金的必然选择。
6) alkali/alkaline earth metal
碱/碱土金属
补充资料：碱土
| 碱土 solonetz 土壤胶体中含交换性钠较多（碱化度达15％或20％)的土壤。其主要特征是：呈强碱性反应（pH8.5～11）；胶体高度分散，干时收缩坚硬板结，湿时膨胀泥泞；结构性差 ，通透性不良；含盐量不高。主要分布于世界各大洲的内陆干旱、半干旱地区，常与盐土相伴存在。中国的东北、华北和西北地区多以斑块状零星分布于盐土中间。碱土因土壤胶体在吸附土壤溶液中钠离子的同时不断交换出钙、镁离子，从而使胶体中交换性钠的百分率增大。中国境内的碱土分3个亚类：①草甸碱土。多见于松辽平原和黄淮海平原，地下水较浅，土壤有轻微的季节性积盐。②草原碱土。主要在大兴安岭以西的高原草原地区，已脱离地下水影响，有明显的柱状、棱柱状碱化层。③龟裂碱土。不受地下水影响，地表因干旱呈龟裂状，几乎不能生长植物，主要在新疆、甘肃、宁夏等地的荒漠和半荒漠地带。碱土改良的中心任务是降低交换性钠的含量。施用石膏、磷石膏和氯化钙等物质，以其中的钙离子交换出碱土中的钠离子，使之随雨水和灌溉水排出土壤；施用硫磺、硫酸亚铁等酸性物质，中和土壤酸度，活化土壤中的钙，降低土壤中碳酸钠盐类浓度，提高某些矿质营养元素对植物的有效性。化学措施须与水利、农业措施相配合。
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参考词条