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pollution
相关语句
  污染
    Enzymological diagnoses of soil pollution by heavy metals: influence of Cd, Cu, Pb and As in purple soil on dehydrogenase of rice roots.
    土壤重金属污染的酶学诊断:紫色土Cd、Cu、Pb和As对水稻根系脱氢酶的影响
短句来源
    MICROCOMPUTERISED INFORMATION MANAGEMENT SYSTEM OF POLLUTION DATA IN VEGETABLE ZONE
    蔬菜区污染数据微机管理系统
短句来源
    Nitrogen pollution from agricultural non-point sources and its control in water system of Taihu Lake.
    苏南太湖水系农业非点源氮污染及其控制对策研究
短句来源
    INFORMATION PROCESS SYSTEM WITH GRAPHIC MODULE IN AGRICULTURAL SOIL POLLUTION
    农业土壤污染数据信息图形化处理系统
短句来源
    Pollution behavior of organic Cr(Ⅲ)complexes in soil-plant system
    有机络合态Cr在土壤-植物系统中的污染行为
短句来源
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  “pollution”译为未确定词的双语例句
    Influence of industrial pollution source on soil animal communities in agro-ecosystem of Xiangjiang River Basin.
    湘江流域工业污染源对农田生态系统土壤动物群落影响的研究
短句来源
    INVESTIGATION ON POLLUTION SOURCE IN AGRICULTURAL ENVIRONMENT IN SHANGHAI
    上海市农业环境污染源调查
短句来源
    Improvement effect of vegetation on saline soil in industrial pollution area
    不同植被对工业污染区盐渍土的改良效果
短句来源
    Pollution of agrochemicals to environment and its countermeasures
    农用化学物质对环境的影响及对策
短句来源
    There are two artificial factors that effect on soil acidification, one is acid precipitation caused by air pollution, another is abuse of chemical fertilizer.
    其中,有两方面的人为因素对土壤酸化产生较大影响,一是大气污染导致酸沉降增加诱发土壤酸化,另一个方面是农业生产过程中的不当措施引起土壤酸化。
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  pollution
An improvedm-dimensional cer model for assessment of the synthetical pollution status of environment
      
This model can be employed to assess various types of synthetical pollution status of the environment, when the contents of some pollutants in the environment are beyond the limits of the standard of GB or WHO/FAO.
      
Operator-splitting galerkin methods for one kind of oin reaction model for the pollution in groundwater
      
Pollution, government expenditure, taxes and stochastic growth
      
This paper studies a stochastic endogenous growth model with pollution.
      
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1. This article gives an account of the relationships between the natural background values of elements in soil and environmental conditions. What influences the natural background values elements in soil is mainly the rocks, parent meterials and the types of soil. The order of the natural background values of elements in soil derived from different kinds of rock is as follows: base rock>limestone>shale>sandstone>granite. 2. The types of rock, parent material and soil should be taken into account in field investigation,...

1. This article gives an account of the relationships between the natural background values of elements in soil and environmental conditions. What influences the natural background values elements in soil is mainly the rocks, parent meterials and the types of soil. The order of the natural background values of elements in soil derived from different kinds of rock is as follows: base rock>limestone>shale>sandstone>granite. 2. The types of rock, parent material and soil should be taken into account in field investigation, the sample locations need not be uniformly distributed, but need avoiding the source of pollution as well as areas possibly affected by it. 3. Special attention must be paid to the selection of analytical methods and quality control in laboratory estimation. 4. The data need to be treated, polluted soils rejected, the types of elemental distribution determined and the background values of elements given. 5. The article also introduces the use of the elemental background values of soil.

1.本文详细叙述了土壤中元素自然背景值与环境的密切关系。影响土壤元素自然背景值的条件,主要是岩性、成土母质和土壤类型。不同岩性上发育的土壤元素自然背景值序列为基性岩>石灰岩>页岩>正长岩、砂岩>花岗岩。 2.野外调查应考虑岩性、母质及土壤类型;样点不必均匀,但必须避开污染源及其所影响的地方。 3.室内测定应注意分析方法的选择和质量控制。 4.数据应进行处理,剔除污染土壤,确定元素的分布类型,给出元素背景值。 5.介绍了土壤背景值的应用。

The harmful effects of pollution caused by both Cr in the southern suburbs and B in the eastern suburbs of Xian upon farm crops were discussed,and also,the movement/conversion/end-results of Cr and B in the underground water/soils/farm crops were dealt with in this pa- per.Cr accumulation is most in soil tilths,of which Cr~(6+)is much more harmful to farm crops than Cr~(3+).But organic matter in soils can play an obvious role in reducing the toxicity caused by Cr~(6+)to plants. Cr accumulation in the roots...

The harmful effects of pollution caused by both Cr in the southern suburbs and B in the eastern suburbs of Xian upon farm crops were discussed,and also,the movement/conversion/end-results of Cr and B in the underground water/soils/farm crops were dealt with in this pa- per.Cr accumulation is most in soil tilths,of which Cr~(6+)is much more harmful to farm crops than Cr~(3+).But organic matter in soils can play an obvious role in reducing the toxicity caused by Cr~(6+)to plants. Cr accumulation in the roots is the most,that in the stems and leaves, next,and that in seeds,the least,while B accumulation is mostly in the old leaves,but there is no apparent B accumulation in the roots and seeds.B and Ca contents in plants are obviously correlated with each other,and there is no linear regression relationship between B and Mg. Based on the fixed position observation and pot experiment,the indexes for B in irrigation water and standards of classification of water soluble B contents in soils were also worked out in the paper.In order to do a good work on agricultural environmental potection,the viewpoints of production/farmland ecology and integration were,at last,advanced and insisted on in the paper.

本文就西安南郊铬污染和东郊硼污染对农作物的危害,论述铬和硼在地下水、土壤和农作物中的迁移、转化和归宿。铬主要累积于土壤耕层,其中 Cr~(6+)对农作物的危害远大于 Cr~(3+);土壤有机质能明显降低 Cr~(6+)对农作物的毒性。铬在根系中积累最多,茎叶次之,籽实最少。而硼则主要积累于老叶;根系和籽实均无明显积累。植株中的硼与钙含量明显正相关;硼与镁没有线性回归关系。根据定位观测和盆栽试验,提出了我国农田灌溉水硼指标和土壤水溶性硼含量分级标准。最后提出要做好农业环境保护工作,必须坚持生产的观点、农田生态的观点和综合的观点。

In order to study pollution in relation with enviromental quality in suburbs of Baoding,we have collected 76 soil profiles in 1982 to 1988. And also has been certain elements as the contents of Cr,As,F,Cu, Zn,Cd,Pb,Hg were determined.It can be seen from the results that the agriculture soil in suburbs of Baoding,as well as,when background level in soil is dependent on the enviromental quality. Our experiments show that cropland areas are more expressive in evaluating background values of toxic elements...

In order to study pollution in relation with enviromental quality in suburbs of Baoding,we have collected 76 soil profiles in 1982 to 1988. And also has been certain elements as the contents of Cr,As,F,Cu, Zn,Cd,Pb,Hg were determined.It can be seen from the results that the agriculture soil in suburbs of Baoding,as well as,when background level in soil is dependent on the enviromental quality. Our experiments show that cropland areas are more expressive in evaluating background values of toxic elements in soil in the suburbs of Baoding areas.Based on statistical processing of the analytical data, distribution types of heavymetal—porllutioll soils of content in various area have been studied.Finally,background values of Cr、As、F、Cu、 Zn、Cd、Pb、Hg in crop land in the suburbs of Baoding were presented. Someproperties were compared with those of content of heavy metal— pollution native soilo Decreasing content of Cr is 7.3%,As is 415%, Cu is 5.7%,Zn is 1.3%,Cd is 13.2%,Pb is 4.7%,Hg is 7.5.%.F is 0.3%,and the values of Cr is 50.5%,As is 9.4,F is 479,Cu is 20.9, Zn is 85.9,Cd is 0.68,Pb is 31.0,Hg is 0.14.The corresponding results to test (confidence level being 95%) with various methods,it is also suitable for the suburbs of Baoding.

对1982年采集本市农业土鉴76个样点进行铬、砷、氟、铜、锌、鎘、铅、汞的背景值调查。认为,本市农业土壤中鎘 ,锌、铅受到污染,主要集中在厂区附近耕地。提出应用占郊区耕地面积50%的粮作区作为土壤背景,其范围是:铭50.5 (46.9~54.1),砷9, 4 (8, 8—9, 9),氟479 (465~494),鎘0. 68 (0. 61 ~0. 75),铅31.0 <27.1~34.9),汞8,14 (0,11~0,17),用三种方法检验,表明获得的背景值符合实际。

 
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