酸性土

However, there still has no report on growing alfalfa in acid purple soil.

但是，目前尚无紫花苜蓿在酸性紫色土中种植的报道。

Current circumstances and mechanisms were reviewed in detail about application of the gypsum in acid soil and alkali soil .

简述了脱离石膏的工业利用，详述了脱离石膏对酸性和碱性土壤改良的现状和机理，并展望了脱硫石膏促进滩涂土植被演替的前景。

The ground of prepares ground of 1.1 cuttage nursery choice cuttage nursery before 1 cuttage should choose earthy and relief evenness, loose, source of water enough, illumination the loam of good, small acidity sandiness that does not have damage caused by a windstorm and freeze injury, control of height above sea level is under 700m, traffic compares convenient place. Cent of bedding of soil preparation of bedding of 1.2 soil preparation undertakes 2 times, first time is comprehensive soil preparation, soil preparation deepness amounts to 30cm above, combine bedding the 2nd times, 15cm of soil preparation deepness, etc of cleared block, fireweed is sundry, make land as far as possible fine.

其主要的技术要点如下。1扦插前的预备1.1扦插苗圃地的选择扦插苗圃地要选择地势平坦、土质疏松、水源充足、光照良好、没有风害和冻害的微酸性沙质壤土，海拔高度控制在700m以下，交通比较方便的地方。1.2整地作畦整地作畦分2次进行，第一次全面整地，整地深度达30cm以上，第二次结合作畦，整地深度15cm，并清除石块、杂草及其他杂物，尽量将土整细。

Based on the established GIS of the Oncomcelania Snails' distribution in Dongting Lake, the author analyzes the environmental condition of the Oncomcelania Snails' habitates comprehensively by the spatial analyzing technology. The results are as following: firstly, the predominant vegetation of Oncomcelania Snails habitat is reed and sedgy. The habitats with reed has a higher livability than with sedgy as dominating vegetation. However, the diffusion of Oncomcelania Snails is much serious in the habitats with sedgy. Secondly ,the predominant soil type of the Oncomcelania Snails breeding area is temporary submergic paddy soils, which is in weak acidity environment, of that PH value is 5.5--7.5, and the organic content is in 2---3%. Thirdly, the 80 percent of the Oncomcelania Snails breeding area, the normalized difference vegetation index of that is in 0.100-0.375%, and the soil humidity of that is in 0.202—0.507, and the distance to the water of that is in 10-230 meters.

在已建立的洞庭湖区江滩钉螺分布地理信息系统的基础上，运用GIS空间分析技术，对钉螺孳生地的环境状况作了比较全面的分析，发现洞庭湖区江滩钉螺孳生地植被类型主要为芦苇和莎草类，钉螺在莎草地带中的存活率高于芦苇地带，而钉螺感染情况最严重的在芦苇地带中；孳生地的土壤类型主要为潴育性水稻土；孳生地土壤PH值处于5.5-7.5之间的弱酸性环境，有机质含量处于2-3%之间；80%孳生地的植被标化指数在0.100-0.375之间、土壤湿度在0.202-0.507之间、近水源距离为10-230之间。

The purification-pretreatment technique of 8 kinds of solid phase extracting column stuffing (silica gel, acid silica gel, Florisil, siliceous magnesium sorbent, Al2O3, celite 545, acid celite, Al2O3+silica gel) for the prepared polluted soil containing 13 kinds of organochlorine pesticides (α-HCH,β-HCH,γ-HCH,δ-HCH, o,p'-DDT, o,p'-DDE, p,p'-DDT, p,p'-DDD, p,p'-DDE, a-endosulfan, dieldrin, endrin, hexachlorobenzene) was screened prior.

用製备的8种固相萃取柱填料（硅胶，酸化硅胶，氟罗里硅土，硅镁型载体，Al2O3，硅藻土载体545，酸性硅藻土，Al2O3+硅胶）对含有13种有机氯农药的污染土壤的纯化预处理技术进行了优化筛选。

There are 18 species of Paphiopedilum in China. Most of them grow in limestone regions and are epiphytic or terrestrial. There are two types of leaves mottled leaves and green leaves. They distribute in subtropics of China. Five species of subgenus Brachypelalum are the most primitive grou p of Paphiopedilum in China and four of them distributed in the limeston e re gions of Eastsouth Yunnan. Most species of Paphiopedilum distribute in this area,too.

国产兜兰野生种共有18种，主要分布于热带过渡地区，主产西南各省区；大多数种类生长于石灰岩山地，多为半附生兰，呈丛生生长，另一部分生长于酸性砂岩面的腐叶土上，多为地生兰，呈单株生长或分蘖状散生；大部分兜兰分布于较高海拔地区；国产兜兰属中最原始的短瓣亚属绝大部分种类仅分布在滇东南地区与贵州、广西连成一片的岩溶地貌的石灰岩地区，而兜兰属中较进化的兜兰亚属大部分种类在本区皆有分布。

The physicochemistry properties of the raw ore and its meaning on geochemistry The earthy black weathered mineral has strong oxide-reducing and acid-base activites. When it reacts with hydroxylammine hydrochloride and inorganic acid, the large number of RE and pb in it can be dissolved in aqueous solution.

原矿的物理化学性质及地球化学意义黑色土状风化物具有较强的可还原性和酸碱活性，它对稀土和Pb等的吸持作用受环境pH值和氧化还原电势影响很大，其中的稀土和Pb可在原矿与还原性物质和酸性物质反应时被溶解出来。

In order to further improve the catalytic activity and investigate the influence of catalyst acidic properties on the catalytic activity, acid-treated montmorillonite and molecular sieve Hβwere modified by loading Lewis acid and protonic acid treatment.

为了进一步提高催化剂的催化活性和考察催化剂酸性质对催化剂活性的影响，对酸化蒙脱土和Hβ分子筛进行了改性处理并考察了它们改性后的催化活性。

The results showed that there were significant differences among fungal species or ecotypes in all above index,which varied with soil types.First,six fungi could colonize maize root on three soils,and the fungal colonization rate was higher on soil collected in the region that had been screened for cinnamon soil and brown soil.

结果表明，6种菌株在上述指标上存在显著的种间或生态型差异，土壤与菌株间存在显著的交互作用。6种菌株在3种土壤上都能与玉米形成菌根，在褐土和棕壤上大多数菌株在分离地所在地区土壤类型上的菌根侵染率较高，说明其对该土壤条件的适应性较强；在红壤强酸性土壤条件抑制了菌根真菌的侵染。

The activities of soil urease, acid phosphatase, sucrase and catalase were higher than those from alluvial soil by 20.3%, 121.0%, 122.2% and 11.9%.

玄武岩发育形成的土壤脲酶、酸性磷酸酶、蔗糖酶和过氧化氢酶活性比冲积土的分别高20.3%、121.0%、122.2%和11.9%。

We have no common name for a mime of Sophron or Xenarchus and a Socratic Conversation; and we should still be without one even if the imitation in the two instances were in trimeters or elegiacs or some other kind of verse--though it is the way with people to tack on 'poet' to the name of a metre, and talk of elegiac-poets and epic-poets, thinking that they call them poets not by reason of the imitative nature of their work, but indiscriminately by reason of the metre they write in.

索夫农 、森那库斯和苏格拉底式的对话采用的模仿没有一个公共的名称；三音步诗、挽歌体或其他类型的诗的模仿也没有——人们把&诗人&这一名词和格律名称结合到一起，称之为挽歌体诗人或者史诗诗人，他们被称为诗人，似乎只是因为遵守格律写作，而非他们作品的模仿本质。

The relationship between communicative competence and grammar teaching should be that of the ends and the means.

交际能力和语法的关系应该是目标与途径的关系。