粘质土

The fixed-NH+4 capacity of all natural layers in lou soil was determined in this thesis,they were 482.2±10.4,1134.9±4.0 and 553.0±11.3 mg N／kg soil in overburden layer,claying horizen and loess parent material horizen respectively.

确定了土娄土各自然层的固定态铵容量，覆盖层、粘化层和黄土母质层分别为(482.2±10.4) mgN/kg、(1134.9±4.0) mgN/kg和(553.0±11.3) mgN/kg土。

The rheological parameters of sullage soft-soil are tested, and the influencing characteristics and changing disciplinarian of clay and water percentage to the initial shear stress and viscosity are analyzed.

测试了淤泥质软土的流变参数，分析了粘粒含量、含水率等因素对初始剪切力、粘度等流变参数的影响特性和变化规律。

The results demonstrate that the distributi on of Hg does not appear to be associated with any other elements, while S may b e capturer for Hg; As, Cr and Ni are elements controlled by pedogenesis; Cd and Pb are elements disturbed by anthropic contributions; Cu is mainly controlled by pedogensis and Zn is closely association with Mn oxides in soils.

元素的相关性分析和聚类分析结果表明 Hg相对于其他元素表现较独立， S对 Hg有一定的捕获能力；As、 Cr和 Ni是受控于成土母质的元素组合；Cd和 Pb是受人为污染影响较强的元素， Cu来源于地质成因的比例较大；Zn受控于土壤中锰氧化物粘粒。

The soil and bark samples collected from Yunnan, Hebei and Shanxi provinces of China, and also from Vietnam, were used as the materials in this experiment. And dung pellets of rabbits or goats that had been autoclaved can be used to induce many kinds of fruiting bodies of the Myxobacteria in different colors, sizes, and shapes. We isolated and purified Myxobacteria strains with the improved method which was found by our laboratory.

本实验以采集自越南以及我国的云南、河北、陕西各地的土样和各种树皮、腐木作为实验材料，利用兔、羊粪球和滤纸作为基质诱导出多种颜色丰富、形态多样的粘细菌子实体，采用本实验室摸索出的较为有效的纯化粘细菌的方法，在实验器材上用24孔细胞培养板代替传统的平皿，有效地缩短了粘细菌的纯化周期，提高了分离纯化的效率。

The increased amount of non--exchangeable NH4^＋-N during the incubation indicated as the following tendency, namely, Eum-Orthic Anthrosols 〉 Los - Orthic Entisols 〉 Hap-Ustic Isohumisols 〉 Ust-Sandiic Entisols. Organic material influenced significantly the increased amount of non-exchangeable NH4^＋-N （P was 0.0002, 0.0004 and 0.0003 when incubated at 20 d, 50 d and 60 d, respectively）. NH4^＋-N increased remarkably when Stlpa bungeana and Medicago sativa were added compared with no addition. The contents of non-exchangeable NH4^＋-N increased significantly when added （NH4）2SO4 compared without addition at 20 d, 40 d and 60d of incubation and P was 0.0037, 0.0033 and 0.0027, respectively. It was the result that the NH4^＋-N from （NH4）2 SO4 was fixed within the soil. The increased amount of non-exchangeable NH4^＋-N increased significantly for different soils, on which different vegetation types grew before the collection of soil samples, when incubated at 20 d （P=0.0434）, but not significantly at 40 d and 60d （P=0.7378 and 0.5375）. The increased amount of non-exchangeable NH4^＋-N in the soil, on which crop straw and nitrogen fertilizer had been incorporated for a long-term period, was larger than that of no addition, but it was not significantly different among these two fertilization models. Soil clay, total N and organic matter were positively correlated remarkably with the contents of non-exchangeable NH4^＋-N, the increased amount of non-exchangeable NH4^＋-N had no correlation with soil clay, whereas it had significantly positive correlation with total N and organic matter.

培养期间非交换性NH4^＋-N的增加量均表现为以土垫旱耕人为土最大，其次是黄土正常新成土，简育干润均腐土和干湿砂质新成土较小；添加有机物料极显著影响培养期间的非交换性NH4^＋-N增加量（培养20d、40d和60d时P分别为0.0002，0.004和0.0003），表现为紫花苜蓿和长芒草土壤非交换性NH4^＋-N的增加量均极显著高于不添加有机物料的对照土壤；在培养20d、40d和60d时，加（NH4）2SO4土样非交换性NH4^＋-N的增加量显著大于不加（NH4）2SO4土样（户分别为0.0037，0.0033和0.0027），这是土壤对（NH4）2SO4中NH4^＋-N固定的必然结果；不同植被类型土壤培养20d时的非交换性NH4^＋-N增加量差异显著（P=0.0434），培养40d和60d时差异不显著（p分别为0.7378和0.5375）；长期秸秆和氮肥配施土壤非交换性NH4^＋-N增加量大于不施肥对照土壤，但差异不显著土壤黏粒、全氮和有机质与培养0d、20d、40d和60d时土壤的非交换性NH4^＋-N含量均呈极显著正相关；而非交换性NH4^＋-N的增加量与粘粒无相关性，但与全氛和有机质呈显著正相关。

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