土壤性质

Laboratory experiments suggest that capillary rise and evaporation play an important part in determining the position of emplacement of ions in the soil profile: in nature, root-zone transpiration also plays a part in solute deposition/adsorption within the evapo-transpiration zone.

实验室的实验表明，毛细管上升和蒸发在决定进驻的离子在土壤剖面位置的一个重要组成部分：性质，根区蒸腾也起着溶质沉积在部分/吸附在土壤水分蒸发，蒸腾区。

In addition, the corncob and soil with a proportion of 1:1 plus chicken dung 15kg/m^3 also had a good physical and chemical properties, increasing the yield by 16%, but its cost is lower than using peat and the soil structure was also improved.

另外，玉米芯与土壤比例为1：1，每立方米加15kg鸡粪的基质的理化性质也较对照有很大改善，使产量增加了16%，成本比使用草炭低，并且起到了改良土壤的作用。

Application of Time Domain Reflectometer in geotechnical measurements is a relatively new development. It can be used to measure electrical properties of soils that are related to soil physical properties. In addition, TDR has found applications in monitoring ground water level and relative deformation in soil, rock, or structure.

TDR应用於大地工程之量测为一较新的发展，它除了可以量测与土壤基本物理性质息息相关之土壤电学性质，也可应用於地下水位监测及土壤、岩石之变形监测。

And then the effect of precipitation to water and heat character of soil is analyzed. The results indicate that the level which precipitation effect water and heat character of soil is different under different precipitation intensity. The affect degree of precipitation to surface physical variate is similar in winter and in summer, but the time that soil return to normal state is different, which in winter is longer than in summer.

其次分析了降水对荒漠土壤水热性质的影响，结果表明：不同大小的降水强度对地表物理量的影响不同；冬季和夏季相比，降水对地表物理量的影响差不多，但冬季的土壤状态的恢复时间要长得多；土壤湿度和反照率的驰豫期与降水都有很好的相关。

In order to develop a new method to study the desorption and bioavailability of hydrophobic organic chemicals in soils, a method using semi-permeable membrane device to study desorption of HOCs in soils has been set up, and assisted desorption of polycyclic aromatic hydrocarbons, phenanthrene, pyrene, and benzo［a］pyrenein three different kinds of soils was studied using SPMD.

为了开发一种表征土壤中憎水性有机污染物解吸及生物有效性的新方法，建立了半透膜被动采样装置研究土壤中有机污染物解吸行为的方法，利用SPMD分析了多环芳烃菲、芘和苯并［a］芘在3种不同性质土壤中的辅助解吸行为。

On the basis of enhancing mineralization of organic matter,and inducing non-biologi-cal stress on microorganic population as a result of soil freezing-thawing,it is summarizedthat global freezing-thawing soils are ...

本文根据土壤冻融加强有机质矿化作用，以及对微生物群体产生非生物应力的性质，结合冻融地区土壤和冻土带湿地所具有的特征，进行综合分析，论述冻融地区土壤是重要的N＿2O释放源。

The new opinion and mechanism that the simultaneously adsorption of complex pollution of both organic and heavy metals will be achieved on soil modified with amphoteric surface modifying agent, which have both charged group and organophilic group on one ASMA molecule, were proposed at first time, and its rationality was testified at the same time; The 50% was the critical CTMAB modifying ratio of soil CEC at which the organophilic bond modifying mechanism was emerged; The thermodynamic characteristics of adsorption of OPT and HMP on OMS were discovered ; The study revealed the surface peculiarity of OMS that the modifying agent were distributed at uneven scatter mode and multi-characters surface were coexisted on surface of OMS, revealed the adsorption peculiarity of OMS that multi-mechanisms were coexisted, confirmed the unequal charge amount modifying mode of OMS in which dual-modifying mechanism of both ion exchange and OPB were processed at the same time, and confirmed that the adsorption hobby to CTMAB was higher than that to Ca2+ on Lou soil.

首次提出了用两性表面修饰剂对土壤进行修饰改性，利用两性表面修饰剂所具有的荷电基团和疏水基团达到对土壤中有机、重金属污染物同时吸附的思路和机理，并通过实验证实了所提设想的合理性；发现了土壤CEC值的50%修饰比例是CTMAB开始显现以疏水键机制对土土样表面进行修饰的临界点；揭示了有机修饰改性土对有机物、重金属吸附过程的热力学特征，填补了该项研究工作的空白；阐明了修饰剂在改性土表面呈分散态的非均匀分布，改性土表面具有不同性质表面共存的表面特征和对污染物多机制共存的吸附特征，确定了阳离子表面修饰剂在土表面的修饰是一种离子交换和疏水键结合两种机制相伴并行且为非等电荷量交换的修饰反应模式，以及土具有对CTMAB的吸附偏好性远大于对钙离子吸附偏好性的特征。

The low level of soil water repellency is reportedly related to soil moisture regime and soil microbial community as well as dissolved organic carbon.

另有研究表明土壤弱疏水性的形成与土壤微生物群落和土壤可溶性有机碳性质相关。

The fungal DNA was extracted from three natural soils with greater differences in physical anti chemical properties in North China by using the second method, and the 28S rDNA-PCR-DGGE profiles showed that the fungal DNA banes were comparatively rich, suggesting that this method could be used in fungal diversity research of North China soils.

利用后一种方法分别对3种理化性质差异较大的中国北方自然土壤样品真菌DNA进行提取并分析，表明所提取土壤基因组DNA真菌特异性PCR-DGGE图谱条带丰富，该方法可用于多种北方土壤真菌多样性研究。

The relevant analysis between watersoluble fluorine content in soils and the simulated experiment of fluorine pollution indoor are carride out.

通过土壤水溶性氟与土壤基本性质的相关分析及室内氟污染的模拟试验，对土壤水溶性氟含量及其影响因素作了初步研究。

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