土壤性质

Earthworms act as consumer, decomposer and modulator in ecosystem.

虹叫在生态系统中既是消费者、分解者，又是调节者，它在生态系统中的功能具体表现在：(1)对土壤中有机质分解和养分循环等关键过程的影响；(2)对土壤理化性质的影响；(3)与植物、微生物及其他动物的相互作用。

The purpose of this thesis is to investigate the effect of soil types, gradation and cement content etc.

摘要 本论文研究的目的在探讨土壤材料种类、级配和水泥用量等因素对土壤水泥抗压强度等工程性质之影响。

In this thesis, the present situation of heavy metals pollution and the physical and chemical properties of soils and the enrichment situation of heavy metals (Cd、 Hg、 Pb and Cr) in the vegetable body in the Harbin city greenbelt was investigated and evaluated. The results were showed as follows:The four heavy metals all polluted greenbelt soil by different degree in Harbin. The pollution of hydrargyrum is the most serious and reaches to the heavy pollution. The next pollution is plumbum, cadmium and chrome.

本文针对哈尔滨市区城市绿地重金属污染状况、土壤的理化性质，以及重金属(Cd、Hg、Pb和Cr)在植物叶片的富集情况进行了分析，并且对哈尔滨市区重金属污染状况进行了综合评价，结果表明：(1)哈尔滨市绿地土壤表层这四种重金属都有不同程度的污染，其中以汞的污染最为严重，达到了重污染；其次是铅和镉，铬的污染较小。

It has important function on increasing soil fertility, the yield and quality of crops and could enhance the ability of crops to resist adversity.

有机肥料是改善土壤理化性质的重要物质，对提高土壤肥力、作物产量和品质及增强作物抗逆性具有相当重要的作用。

Magnetic susceptibility combined with other pedogenetic is very useful in illustrating the soil-forming processes in urban areas.

城市土壤磁学性质与其他发生学特性的系统研究，有利于阐明城市土壤的形成过程。

This paper explain the results and suggests that the upper part of the section is normal loess/paleosol series, while the lower part is redeposited loess and paleosols.

结合该剖面的岩石磁学性质与该区域其他剖面以及洛川剖面的对比，本文的解释是该剖面上部为正常的黄土古土壤序列，而底部为再搬运沉积的黄土古土壤。

The different land use patterns affect soil physical property and soil fertility quality.

不同的土地利用方式影响着土壤的理化性质及土壤质量。

The results showed that: the indictors of soil enzymes and soil physiochemical properties were significantly different, and decreased with the deepening of the soil in all kinds of vegetation.

结果表明：在各种林分类型之间所测土壤理化性质和土壤酶指标有显著性差异，并且随着土层的加深，均表现出不断减小的趋势。

Surcharging is one of the exsiting ground improvement techniques. It could be used to reduce long term settlement and also used to increase soil strength. But the rebound and recompression properties after surcharge removal are not well established.

超载工法为众多地盘改良工法之一，常被用来改良软弱土壤，不仅可增加土壤的强度，并可避免建物完成后因不均匀的沉陷而衍生问题，但是对於地盘受超载改良后的回胀与再压缩性质一直无法确实的了解。

Thermo-Time Domain Reflectometry has many advantages, such as low cost, less disturbance of the soil and time-saving, thus showing great potential in soil research.

热脉冲－时域反射仪方法所用成本低，对土壤扰动小，测试时间短，具有很多优点，因此在测定土壤热性质方面具有很大的潜力。

It has been put forward that there exists single Ball point and double Ball points on the symmetrical connecting-rod curves of equilateral mechanisms.

从鲍尔点的形成原理出发，分析对称连杆曲线上鲍尔点的产生条件，提出等边机构的对称连杆曲线上有单鲍尔点和双鲍尔点。

The factory affiliated to the Group primarily manufactures multiple-purpose pincers, baking kits, knives, scissors, kitchenware, gardening tools and beauty care kits as well as other hardware tools, the annual production value of which reaches US$ 30 million dollars.

集团所属工厂主要生产多用钳、烤具、刀具、剪刀、厨具、花园工具、美容套等五金产品，年生产总值3000万美元，产品价廉物美、选料上乘、质量保证，深受国内外客户的青睐