碱性土壤

The quantity of actinomyces and their percentages followed that of bacteria,while the percentages decreased g...

这是由于盘锦芦苇湿地的土壤偏盐碱性，有利于细菌和放线菌繁殖，抑制了真菌的繁殖；而且季节性积水导致通气状况不良也抑制了真菌的生存。

When produce dense sodium carbonate with the material of natural alkali,a plenty of alkaline scrap material or alkaline mud which can alkalify the earth ,pollute the air and environment is manufactured ,using the scrap material by calcine with a large movable kiln is expensive.

在以天然碱为原料生产重质纯碱时，伴生大量碱性废渣，此废渣堆放或坑埋，碱化土壤，污染环境和空气，若用大型回转窑煅烧处理，成本高不经济。

Through field test studied on reclaimed water irrigating affected to soil salification and basification.

选择北京市大兴区北野厂灌区内3个典型区域作为研究对象，通过田间试验研究了再生水灌溉对土壤盐碱性的影响。

Calcifuge Describing plants that grow on soils containing very little calcium carbonate, such as sandy or peaty soils and cannot grow on basic substrates such as most chalk and limestone soils.

嫌钙植物：在碳酸钙含量低的土壤中生存的植物，例如在沙地或泥地中生长。这种植物在石灰石之类的碱性基质中不能生长。

Of the 4 soil enzymes studied, alkaline phosphatase and dehydrogenase were higher than urase and arylsulfatase in activity.

在所测定的4种土壤酶中，碱性磷酸酶和脱氢酶的活性高於脉酶和芳基硫酸酯酶的活性。

Blue Grama grass is native to the Great Plains where the temperature ranges from hot to cold and the soil is primarily of alkaline content and rainfall can be practically non-existent in some areas.

蓝色格兰马草是大平原上的一个自然草种。在大平原上，炎热和寒冷的气候都有。最初的土壤含有碱性成分，在有些区域几乎没有降水。

In urban parks and green lands where human disturbance was greater, soil pH was alkali, and the species were mainly belonging to the genera of Haplocladium and Bryum and the family of Pottiaceae. In hilly area where human disturbance was lesser, soil pH turned to acidic, and the bryophytes were more, with pleurocarpous mosses and liverworts being relatively rich.

在市区平原地势的公园和绿地，人为干扰较大，土壤呈碱性，苔藓植物种类以小羽藓属、真藓属和丛藓科为主；而在海拔较高的丘陵地区，人为干扰较小，土壤呈酸性，苔藓植物种类相对丰富，侧蒴藓类和苔类较多。

The mount of germ and fungus quantity in soil are remarkably increased for the continuous cropping about 5 years, puts the trichobacteria quantity always change tendency to reduce;The edaphon total quantity, the bacterium quantity change reduces generally above the continuous cropping 5 years and below 5 years (including 5 years) the change are not obvious;In the nitrogen physiology group by ammoniates the bacterium primarily and the quantity changes are not very big;The nitrifying bacteria quantity is lower than the comparison (non- continuous cropping), the quantity of denitrifying bacteria is opposite;The alkalinity phosphatase, the urease, invertin activeness have a closed relations with the continuous cropping when it will increase less than 5 years or decrease in more than 5 years. The relation between catalase activeness and the continuous cropping is not very big. The reduction of the invertin activeness, the alkalinity phosphatase, urease activeness have slightly elevates, catalase activeness have no the regular changes.

表现为连作条件下土壤真菌数量显著增大，放线菌数量总的变化趋势降低；土壤微生物总量、细菌数量变化在连作5年以上普遍降低，5年以下(包括5年)则变化差异不明显；氮素生理群中以氨化细菌为主，但数量变化不大；硝化细菌数量低于对照组，反硝化细菌数量则相反：多酚氧化酶、转化酶活性在5年之前逐渐上升，5年之后逐渐下降，，脲酶活性随着连作年限增加持续上升，过氧化氢酶活性、碱性磷酸酶活性变化无规律。

Results showed that the activity of soil enzymes was obviously different.Among the different vegetation types,the activity of soil enzymes under Tilia mandshurica forests was the highest except peroxidase,whereas that under shrub-grass was the lowest.The activity of soil urease and alkaline phosphate under shrub was higher than that under the mixed forests.Activity of soil catalase and phosphate under Larix principis-rupprechtii forests was higher than that under Pinus tabulaeformis.

结果表明：不同植被类型的土壤酶活性有显著的区别，其中除过氧化物酶外，糠椴林的土壤酶活性均属最高水平，而灌草丛所有酶活性都属最低水平；灌木丛中脲酶和碱性磷酸酶活性显著高于杂木林；华北落叶松林的磷酸酶和过氧化氢酶活性均高于油松林。

The 0-40cm soil layer soil mean value looked that mixes by the interlacing broadcasts the lawn soil ulmin, the alkaline hydrolysis nitrogen content to be highest; The fast-acting phosphorus, the fast-acting potassium are highest by the unicast awnless brome lawn content; The colleague mixes broadcasts lawn pH to be biggest.

无芒雀麦对土壤要求不严，耐贫瘠、严寒，耐碱性也较强，需氮较多，适宜与紫花苜蓿、沙打旺、野豌豆、百脉根、红三叶等豆科牧草混播，借助豆科牧草固氮作用，促进无芒雀麦良好生长[4]。本实验就是无芒雀麦单播草地和与紫花苜蓿混播草地对土壤理化性质的影响进行比较。

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。