碱性土壤

ConclusionPheretima aspergillum is suitable to the acidic soil habitat, high water content and dry soil are unsuitable for their lives.

结论参环毛蚓选择在湿度适中，偏酸性的土壤中生活；高湿及较干燥，强酸性和碱性的土壤不适宜其生活。

In order to know the effects of mulch-drip irrigation on soil enzyme activities of saline-sodic soil with shallow water table, activities of alkaline phosphatase, urease, and invertase around the dripper, within 30 cm in horizontal direction and 40 cm in vertical direction from the dripper during the reclamation process, were investigated. Changes and distribution of soil enzyme activities, also their relationships with principal soil environment factors were studied.

为了解地下水浅埋区重度盐碱地覆膜滴灌对土壤酶活性的影响，测定了重度盐碱地在滴灌利用过程中距离滴头不同水平位置（0～30 cm）和垂直深度（0～40 cm）的土壤碱性磷酸酶、脲酶和蔗糖酶活性，并对土壤酶活性的变化、空间分布特征及与土壤环境因子之间的相关关系进行分析。

The purposes of this study were to develop a sequential chemical extractions scheme suitable to fractionate the forms of heavy metals associated with phosphate in neutral and alkali soils contaminated with heavy metals.

许多学者提出重金属连续萃取法(sequential chemical extractions， SCE)研究重金属存在型态大多忽略和磷酸盐之相关性，本研究拟提出适当的连续萃取步骤，探讨中性及碱性污染土壤中重金属与磷存在型态的分布及其相关性，并探讨用盐酸清洗此等土壤时，其可能移除重金属之型态及部份植物养分成份被移除的程度。

We investigated the effect of combined application of maize straw, bean haulm, wheat straw and weathered coal on the activity of alkaline phosphate enzyme in calcareous cinnamon soil by means of regression design of 416A-optimization.

本研究采用四因数二次回归 4 1 6A—最优设计方法，通过裸土盆栽试验，在施用少量N、P肥的基础上，研究了玉米秆、豆秆、麦秆和风化煤四种有机物料配合施用对石灰性褐土中碱性磷酸酶活性的影响，建立了上述四个因子与土壤碱性磷酸酶活性之间的数学模型，并分别进行了试验因子的主效应和互作效应的分析

The activities of soil catalase, alkaline phosphatase, dehydrogenase and invertase were degressive along with soil depth.

土壤过氧化氢酶、碱性磷酸酶、脱氢酶、转化酶随着土壤深度的加深呈现递减的规律。

Taking a smeltery in Shenyang,Liaoning Province as research object,several alkali chemicals were added to increase the soil pH and reduce leaching toxicity of arsenic in soil impacted by heavy metals.

文章以沈阳某冶炼厂厂区旧址的重金属复合污染土壤为研究对象，通过向土壤中添加不同药剂，研究了不同碱性化学物质对土壤砷稳定化的效果。

Result On the whole, the collected sludge was a kind of organic fertilizer with high nutrient content, which contained rich organic matter (296.84g/kg on average), high nitrogen (48.33g/kg on average), medium phosphorus (18.94g/kg on average), low potassium (14.17g/kg on average). The pH value of the sludge was all in 5.95-7.73, being between subacidity and alkalescence, and application in the garden soil could not produce great influence on the acidity-alkalinity of soil.

结果］总体上所采集污泥是一种富含有机质（平均为296.84g/kg）、高氮（平均为48.33g/kg）、中磷（平均为18.94g/kg）、低钾（平均为14.17g/kg）的养分含量颇高的有机肥。pH值在5.95-7.73，处于微酸性和微碱性之间，在园林土壤中施用，不会对土壤的酸碱度造成大的影响。

The soil had the alkalize characteristic, and the decisive factors were terrain, texture and precipitation, so before the haloxylon ammodendron settled down, the soil had the alkalize characteristic, and the haloxylon ammodendron was alkali-resistant plant, but if the total alkalinity excessively high, the haloxylon ammodendron also grew difficulty.

土壤具有碱化特征，主要是由地形、质地、降水等结构性因素决定的，由此得出荒漠植被梭梭定居之前土壤就具有了碱化特征，梭梭是耐碱性荒漠植被，但总碱度过高的区域梭梭也难以生长，因此土壤酸碱度仍然是该区域影响梭梭生长和分布的重要因子。

This study was therefore conducted in a small watershed of the loessial gully region to reveal the profile distribution of soil properties as affected by landforms.

论文研究了黄土高原沟壑区小流域地形条件对土壤性质剖面分布的影响，结果表明土壤硝态氮、速效磷、碱性磷酸酶和蔗糖酶为高度变异的土壤性质；pH值和过氧化氢酶为小变异土壤性质。

The soil microorganisms quantities, microbial diversity index, microbial biomass carbon and the cellulose decomposition strength significantly reduced with increasing of heavy metal concentration, but the soil basal respiration rate were positively enhanced. The soil urease, alkaline phosphatase and polyphenol oxidase in the lead zinc mining area were sensitive. The invertase and catalase were not obvious inhibited to the heavy metals.

该矿区土壤微生物区系组成和微生物活性显著不同于临近非矿区土壤，随着重金属含量的增加，土壤微生物数量、微生物多样性指数、微生物生物量碳以及纤维素分解强度均显著降低，但土壤基础呼吸却明显升高；土壤脲酶、碱性磷酸酶、多酚氧化酶对铅锌矿较为敏感，而蔗糖酶和过氧化氢酶受到的抑制作用不明显。

Do not gum up the work by telling mother what we are going to do .

别告诉母亲我们要干的事，那会把事情搞糟的。

In recent years, application of the partial prestressed concrete beam s is developed.

近年来，随着部分预应力砼梁应用的推广，发现我国规范所采用的名义拉应力法的计算结果不稳定。