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城市土壤     
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  urban soil
     Research Progress in Effect of Urbanization on Urban Soil Environment
     城市土壤研究进展与中国城市土壤生态保护研究
短句来源
     Status quo and trend of urban soil contamination research
     城市土壤污染研究现状与趋势
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     Analysis of characteristics of lead pollution in urban soil and influence factors
     城市土壤Pb污染特征及影响因素分析
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     Analysis on Characteristics of Heavy Metal Pollution in Urban Soil
     城市土壤重金属污染特征分析
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     Situation and Trend of Heavy Metal Contamination in Urban Soil
     城市土壤重金属污染研究现状与趋势
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  urban soils
     The results showed that the c oncentrations of total P, available P and soluble P in urban soils were 1.26~11 .41g·kg -1 , 19.48~166.74mg·kg -1 and 0.51~5.41 mg·kg -1 , res pectively , much higher than those in agricultural soils in the same region.
     结果表明 ,城市土壤的全P、有效P和可溶性P含量分别为 1.2 6~ 11.41g·kg-1、19.48~ 166.74mg·kg-1和 0 .5 1~ 5 .41mg·kg-1,远高于相同地区的农业土壤 ;
短句来源
     The results showed that the urban soils in Nanjing were not evidently polluted by V,Mn,Co,Ni and Cr, but contaminated by Cu, Pb, Zn, Sb, Cd to varying degrees and especially Hg to some extent.
     结果表明,南京城市土壤中V、Mn、Co、Ni、Cr污染不明显,但受到了不同程度的Cu、Pb、Zn、Sb、Hg、Cd污染,其中Hg污染比较严重。
短句来源
     The results indicated that Fe,Mn,Cr,Ni,Co,V,Zn and Pb in Nanjing urban soils were dominated by the residual fraction,and were least present in exchangeable fraction.
     结果表明 ,南京城市土壤中Fe,Mn ,Cr,Ni,Co ,V ,Zn ,Pb以残渣晶格态为主 ,可交换态比例极低 ;
短句来源
     Application and comparison of soil compaction indexes in the evaluation of urban soils
     土壤压实指标在城市土壤评价中的应用与比较
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     Heavy metal contamination of urban soils in China:status and countermeasures
     中国城市土壤重金属污染研究现状及对策
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  city soil
     The total phosphorus and available phosphorus were increased by 70.1%~117.4% and 173.5%~222.1% as compared with that of forest soil, 44.9 %~161.2% and increased by 98.4%~694.4% in comparison with agricultural soil. This result showed that there was apparent ultrophication of phosphorus in city soil.
     全磷和有效磷均比森林土壤提高 70 .1%~ 117.4 %和 173.5 %~ 2 2 2 .1% ,比农业土壤提高 4 4 .9%~ 16 1.2 %和 98.4 %~ 6 94 .4 % ,磷在城市土壤中富营养化现象严重。
短句来源
     Study on Quality Evolution of City Soil and Effect of Soil Amelioration by Organic Fertilizer Application
     城市土壤质量演变与有机改土培肥作用研究
短句来源
     The total nitrogen and rapidly available nitrogen of city soil at the depth of 0~60cm soil layer was decreased.
     比自然土壤降低 96 .1%和 95 .0 %。 0~ 6 0 cm土层城市土壤全氮、速效氮降低 ;
短句来源
     The results showed: There were apparent changes of physical properties and nutrition content in the evolution process of city soil quality.
     结果表明 :城市土壤演变过程中土壤物理性质和养分含量发生了明显的变化。
短句来源
     By method of comparison and analysis, the evolution process of soil quality and its evolution reason from natural soil to agricutural soil and city soil, as well as the effect of organic fertilizer application on the availability of soil quality were studied.
     采用对比分析的方法 ,研究了从自然土壤到森林土壤和农业土壤 ,最终演变为城市土壤的过程中 ,土壤质量的变化及其成因以及有机改土培肥措施对城市土壤质量有效性的影响。
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  urban soil contaminations
     So the problems of urban soil contaminations have been paid more and more attention.
     因此 ,城市土壤污染问题已经引起人们的高度重视。
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  urban soil
Contamination and distribution of heavy metals in urban soil in Zhangzhou City, Fujian, China
      
Distribution of lead in urban soil and its potential risk in Shenyang City, China
      
The horizontal and vertical distribution characteristics of Pb in urban soil of Shenyang City, China were investigated in this study.
      
Source and distribution of metals in urban soil of Bombay, India, using multivariate statistical techniques
      
Environment impact of heavy metals on urban soil in the vicinity of industrial area of Baoji city, P.R.
      
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  urban soils
At a constant period of biological activity, the depth of humification is primarily a function of granulometric and chemical composition of urban soils.
      
Microarthropod communities in anthropogenic urban soils.
      
Microarthropod communities in anthropogenic urban soils.
      
Among the urban soils of Moscow, the soils of botanical gardens remain poorly studied.
      
Dynamics of contamination of urban soils with lead in the eastern district of Moscow
      
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  其他


The characteristics of the soil in urban economic radius area has been Changed remarkably by intensive agricultural use with specific objectives and commercial interests. The soil including the soil in the rural resident area can be defined as urban or city soil. The agriculture on the soil is highly specialized such as the production of vegetables, fruits, flowers, moat, milk, eggs, fishts and other side-line products in agriculture. So that it would be able to afford the extremely high price for land in urban,...

The characteristics of the soil in urban economic radius area has been Changed remarkably by intensive agricultural use with specific objectives and commercial interests. The soil including the soil in the rural resident area can be defined as urban or city soil. The agriculture on the soil is highly specialized such as the production of vegetables, fruits, flowers, moat, milk, eggs, fishts and other side-line products in agriculture. So that it would be able to afford the extremely high price for land in urban, areas The intensification of the use of the soil is usually very high, especially a huge sum input of urban ferilizers such as eomposted urban wastes, garbage and coal ashes human excreta, urban mud and filthy water would accelerate the increament of soil fertility. Typical city soil always has a artificial profile created by urbanization which is quite different from the soils in rural area. The movement of soil materials (NPK erc) artificially towards urban areas has being formed a spots congregation of elements distributed on the surface of the earth which causes the formation of urban soil. We could propose a new branch of soil science——citypedology, on which the study would accelerate the urbanization in our country and it is of learning significance for the development of soil science,

在城市经济半径内,由于土壤产品专业化、商品化所带来的集约利用,使土体性质发生显著改变的土壤,称为城市土壤,也包括农村中庭院经济利用的土壤。城市土壤概念的提出,突破了传统土壤学认为土壤是独立自然体、地理体、历史体的局限性观点,使农业土壤业从研究人化的自然土壤过渡到土壤人工体和人工模拟土的研究。城市土壤的研究,对实现我国农业从自给农业向商品农业、从掠夺农业向生态农业、从传统经验农业向科技农业的转变,有重要意义。

The term urdan soils is not a taxonomical name hut a relative term com-parable with rural soils from the point of view of eco-economics. Urbansoils have been considered as artificial soils whose properties have beengreatly changed by intensive agricultural use. Typical urban soils have aman-made overlying soil profile be provided with the phenomenon of tillagehorizon eutrophication. With respect to the pedogenic processes of urbansoils, it may be recosnized that the migration of congregation and diffusionof...

The term urdan soils is not a taxonomical name hut a relative term com-parable with rural soils from the point of view of eco-economics. Urbansoils have been considered as artificial soils whose properties have beengreatly changed by intensive agricultural use. Typical urban soils have aman-made overlying soil profile be provided with the phenomenon of tillagehorizon eutrophication. With respect to the pedogenic processes of urbansoils, it may be recosnized that the migration of congregation and diffusionof soil materials is a function of the population gravitation field.the gra-vitation radius is larger than the diffusion radius constantly, and the inten-sity of diffusion decrease by degrees act in accordance with the concentriclaw. At last the spots congregation of elements surrounding the city andrural residence distributed on the surface of the earth which causes theformation of urban soils.According to its geographical position urban soilsmay be classified into three groups such as urban area soils,suburbs soilsand disfant suburban area soils which are the main objects of study insystematic pedology

土壤物质的迁移聚积和扩散强度是人口引力场的函数,引力半径恒大于扩散半径,扩散强度是同心圆规律递减,从而指出了地球表面土壤物质斑点状浓集边界的存在,正是这个规律决定了城市土壤的形成和分布。城市土壤的分类,既可进行解释性分类和因素一生态分类,对典型城市土壤也可进行实体分类,但其实质是土壤自然人工体的实用分类,根据土壤的利用情况和经济生态功能,可分为市区土壤,近郊土壤和远郊土壤三大类型。成为系统土壤学的主要研究对象。

This article supplies a descriptive system for urban soil study use the materials of Yangzhou city situated in Jiangsu province as an example. Urban soil ecosystem may be divided into three subsystems: urban areas soils, suburbs soils and distant suburban soils. According to the land utilization and from the point of information entropy, characteristic of urban soil's solum and the basis of urban soil classification was proposed out. The development of urban-type agriculture and how to optimum control the Yangzhou...

This article supplies a descriptive system for urban soil study use the materials of Yangzhou city situated in Jiangsu province as an example. Urban soil ecosystem may be divided into three subsystems: urban areas soils, suburbs soils and distant suburban soils. According to the land utilization and from the point of information entropy, characteristic of urban soil's solum and the basis of urban soil classification was proposed out. The development of urban-type agriculture and how to optimum control the Yangzhou urban soil ecosystem was disscused.

本文以江苏省扬州市为例,着重从土壤信息熵角度研究城市土壤类型的划分,指出动物性元素磷的富集是城市土壤物质聚积的特征,进而对扬州市土壤生态系的管理和城郊型农业发展方向进行了探讨。

 
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