土壤性质

Moreover, Heilongjiang blackland boasts humus soil better than other kind, with humus content 5 -10 times higher than yellow and red soils.

之所以有如此高的赞誉与评价，概因土壤肥沃：黑龙江所处的寒地黑土土壤的肥力、理化性质和土质结构都优于其他各类土壤，仅就腐殖质而言，就是黄土和红土的5倍至10倍。

Soil erosion is one of the main environmental problems in the world ,it is the root cause of land deterioration 、 soil fertility degression、 soil physico -chemical quality bad、 land use capability felling and ecological environment deterioration.

土壤侵蚀是世界上的主要环境问题之一，是造成土地退化、土壤肥力下降、土壤理化性质变劣、土地利用率降低、生态环境恶化的根本原因。

Electrokinetic transport process could promote effectively the desorption and migration of phenol and 2,4-dichlorophenol in soil; electromigration and electroosmosis were the main mechanisms; and the .

结果表明，电动力学过程能有效地促进土壤中苯酚及2，4-二氯酚的解吸附和迁移，电渗析和电迁移是其主要的作用机理，其迁移效果与电动力学形式、污染物类型、土壤酸碱性质和电极反应等密切相关，可以采用适当的电动力学工艺修复含酚类化合物的污染土壤。

From October to November in 2005, the soil macrofauna communities at 7 soil using types were investigated: paddy field, kaleyard, orchard (0), no vegetation wilderness, nursery, yard and lawn. Researches showed that there were 1052 soil macrofauna individuals belonged to 19 orders, 8 classes, 3 phyla.

2005年10~11月对金华市市区北部不同土地利用方式下的大型土壤动物群落与土壤理化性质的关系进行了研究，在水稻田、菜园、果园、无植被荒地、苗圃、庭院和草皮绿地7种不同利用方式的土地中取样，共获得大型土壤动物1052只，隶属3门8纲19目。

According to the result of artificial rainfall, the character and factors affectedby soil, rainfall, chemicals, slope length, slope gradient and field mangment practices, for rainfall, runoff,infiltration, soil erosion and soil chemicals, such as NO_3~-, NH_4~+, PO_4~(3-), K~+ and Br~-, are investigated. Thedeterminate methods, influence factors and practical application of the mixing zone depth are also researched.The results can enrich the dynamics of soil, water and nutrient transport, evaluate the soil water and fertilizerefficiency, and theoretically benefit the research of agricultural NSP on loess hill slope. 1. According to the surface transport experiments of soil chemicals under the non-satuation soil and watererosion condiction, for adsorbed PO_4~(3-) and K~+, the time of sheet erosion and rill erosion initiation is coincidentthat of chemicals content in surface runoff climbs, and then their abundant export by surface runoff is urged.

本文以黄土坡地为研究对象，通过模拟降雨试验，研究土壤因素、降雨因素、化学物质理化性质、坡长坡度因素和农田管理措施等对坡地降雨—产流—入渗—土壤侵蚀—农田NO_3~-、NH_4~+、PO_4~(3-)、K~+和Br~-地表迁移的影响，研究非饱和土壤和水蚀条件下混合层深度的确定、影响因素和模拟，探讨其在黄土坡地的实际应用，为丰富坡地水分养分迁移动力学、提高旱地土壤水分养分利用率和深化农田非点源污染研究提供理论依据。

Significant differences were observed in the kinetic parameters of test enzymes between continuous cropping of gramineous crops and continuous cropping of or rotation with leguminous crop.

土壤质量与土壤的生物学性质密切相关，种植制度对土壤生物学特性的影响研究对土壤质量管理具有重要的意义。

The result showed that there existed spatial variability of soil nutrients. N, P and K had medium variability, which were mainly affected by routine fertilization measures. On the contrary, Organic matter has a smaller spatial variability; Soil nutrient had semi-variance structure, and model best fit included Circular, Pentaspherical and Exponential. There existed medium spatial correlation in N, P, K and OM.

结果表明，土壤养分性质均存在着空间变异性，受常规施肥措施影响较大的碱解氮、速效磷、速效钾变异相对较大；常规施肥有机质投放较少，变异相对较小；土壤养分性质均存在半方差结构，分别拟合Circular、Pentaspherical、Exponential模型，碱解氮、速效磷、速效钾和有机质均显示中等的空间相关性。

When taking into account the effect of soil organic carbon content on EC50 values, determination coefficients（R2）of the regression models between soil physico-chemical properties and EC50 values were increased from 0.743 to 0.824 in unleached soils and from 0.853 to 0.925 in leached soils, respectively.

土壤pH值是土壤中Ni对西红柿生长毒性的主控因子，进一步引入土壤有机碳因子时，淋洗和非淋洗土壤理化性质和EC50之间回归方程的决定系数R2由0.853和0.743分别提高到了0.925和0.824。

The quantitative study on the influences of soil structural properties and total organic material content on soil water characteristics, such as water holding within low suctions and saturated infiltration, especially the usage of fractal dimension, can be used in simplifying regional experienced forests-hydrological models.

4定量揭示了研究区土壤结构和有机质含量对土壤低吸力段持水性能、饱和渗透速率等水分的影响，尤其是分形理论的应用，可以为简化区域性经验水文模型奠定基础，同时明确了土壤结构稳定性、水分性质、有机质含量等在土壤侵蚀防治中的作用。

Microbial Organic Fertilizer contains large amount of organic substances and soilavailable microbe. During life activities process of SABs, a great deal of organic acid wasproduced, available form of N, P and K were released continually. These effects could improve soilphysical, chemical properties and soil fertility, take positive role for planting of Alfalfa in salineland and amendment of saline land. So research and application of MOF is important for saline landamendment and usage.

生物有机肥中含有大量的有机质、土壤有益微生物，其所含的有益微生物在其生命活动过程中，能产生大量有机酸，不断释放出土壤中的迟效态氮磷钾，能有效改善土壤的理化性质，提高土壤肥力，这些因素都会对盐碱地种植苜蓿和改良盐碱土起到一定的积极作用，因此研究利用生物有机肥改良、利用盐碱土具有重要的意义。

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