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wetland
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  湿地
    Ecological Functions and the Utilization of Dianshan Lake Wetland.
    淀山湖湿地及其生态功能与利用
短句来源
    Protection and Sustainable Utilization of WetlandBiodiversity in China
    中国湿地生物多样性的保护和持续利用
短句来源
    On Coastal Wetland Resources and Agro wetland Ecological Construction in Tianjin
    天津滨海湿地资源与农业湿地生态建设
短句来源
    Study of the Dynamics of Nitrogen and Phosphorus Release in Soil of Simulated Wetland System
    模拟湿地系统中土壤氮磷释放的动态研究
短句来源
    Pondering the Establishment of Agricultural Park in Wetland -Feasibility of Establishing Agricultural Park in Wetland in Honghu Lake
    关于建立湿地农业公园的思考——建设洪湖湿地农业公园的可行性初探
短句来源
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  湿地
    Ecological Functions and the Utilization of Dianshan Lake Wetland.
    淀山湖湿地及其生态功能与利用
短句来源
    Protection and Sustainable Utilization of WetlandBiodiversity in China
    中国湿地生物多样性的保护和持续利用
短句来源
    On Coastal Wetland Resources and Agro wetland Ecological Construction in Tianjin
    天津滨海湿地资源与农业湿地生态建设
短句来源
    Study of the Dynamics of Nitrogen and Phosphorus Release in Soil of Simulated Wetland System
    模拟湿地系统中土壤氮磷释放的动态研究
短句来源
    Pondering the Establishment of Agricultural Park in Wetland -Feasibility of Establishing Agricultural Park in Wetland in Honghu Lake
    关于建立湿地农业公园的思考——建设洪湖湿地农业公园的可行性初探
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  “wetland”译为未确定词的双语例句
    Characteristics of Mire Soils and Its Sustainable Utilization in Xianghai Mire Wetland.
    向海沼泽湿地土壤特征及可持续利用
短句来源
    Spatial Distribution of Nitrogen and Phosphorus in Soil of Momoge Wetland
    莫莫格湿地土壤氮磷空间分布规律研究
短句来源
    Study on the Distribution Characteristics and Productive Effects of Nitrogen in Soil of Xianghai Mire Wetland
    吉林省向海沼泽湿地土壤中氮素分布特征及生产效应研究
短句来源
    Soil Surface CO_2 Fluxes of Deyeuxia angustifolia Wetland in Sanjiang Plain
    三江平原小叶章湿地土壤的CO_2通量
短句来源
    Spatial distribution characteristics and ecological effects of carbon and nitrogen of soil in Huolin River catchment wetland
    霍林河流域湿地土壤碳氮空间分布特征及生态效应
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  wetland
Plant species diversity of wetland ecosystem in an arid and semi-arid region in northwest China
      
The whole study area was divided into the wetland zone, the ecotone and the arid grassland zone in terms of habitat characteristics and vegetation types.
      
angustifolia organs in the two types of wetland communities was distinctly different, which could be described by polynomial.
      
To determine the impact of photosynthesis and transpiration on nitrogen removal in wetlands, an artificial wetland planted with reeds was constructed to treat highly concentrated domestic wastewater.
      
Results suggest that the photosynthesis and transpiration of wetland plants have a great impact on nitrogen removal efficiency of wetlands, which can be enhanced by an increase in the photosynthesis and transpiration rate.
      
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A study was carried out on the relationship between characteristics of ferricreductase and various forms of iron oxides, activation of iron oxide of paddy soils derived from the wetland in Li-Xia-He river region of Jiangsu Province. An investigation on the measuring method of ferric-reductase was also conducted and the concepts of both ferric-reductase activity (K_1) and natural ferric-reductase activity (K_2) were tentatively put forward. The results indicated that K_1 and K_2 for the cultivated horizons...

A study was carried out on the relationship between characteristics of ferricreductase and various forms of iron oxides, activation of iron oxide of paddy soils derived from the wetland in Li-Xia-He river region of Jiangsu Province. An investigation on the measuring method of ferric-reductase was also conducted and the concepts of both ferric-reductase activity (K_1) and natural ferric-reductase activity (K_2) were tentatively put forward. The results indicated that K_1 and K_2 for the cultivated horizons of all soil profiles tested were more than 320 mg Fe_2O_3/100g, 48h. and 100mg Fe_2O_3/100g.48h, respectively. K_1 in the whole profile of deleyed paddy soil was higher and tended to increase with the increasing of depth. But it decreased gradually for degleyed hydrogenic paddy soils.

本文研究了江苏里下河地区低湿地土壤上发育的水稻土铁还原酶活性特征与氧化铁的形态、铁的活化及水稻土的发育度之间的关系。结果表明,所有供试土壤剖面的耕层的铁还原酶活性都较高,不同发育度的水稻土具有不同的剖面分布规律。脱潜型水稻土剖面上下层铗还原酶活性均较高,且有随深度增加而上升的趋势,而脱潜潴育型水稻土则随深度而下降。铁还原酶活性是与土壤通气、透水、氧化还原状况、氧化铁活化度、有机质含量等理化性状有密切关系的综合性生物学参数。它在一定程度上能反映低湿地水稻土的发育度。此外,本文还对铁还原酶活性的测定方法作了探索,尝试性地提出了自然铁还原酶活性的概念。自然铁还原酶活性的测定,简便易行,洲定时条件较为接近田间实际状况。

Changes in organic matter content of surface and gleying horizon soils in the succession of wetland ecosystems were studied, which are from senile lake to swamp and rice fields in Four Lake region and Lixiahe region of China. In addition, the relation between organic matter content and reduction potential was also studied with incubation experiment. The results are as follows:The organic matter content of soil increased sharply in the succession from senile lake to swamp, and decreased significantly in...

Changes in organic matter content of surface and gleying horizon soils in the succession of wetland ecosystems were studied, which are from senile lake to swamp and rice fields in Four Lake region and Lixiahe region of China. In addition, the relation between organic matter content and reduction potential was also studied with incubation experiment. The results are as follows:The organic matter content of soil increased sharply in the succession from senile lake to swamp, and decreased significantly in the succession from swamp to rice fields, developsment with of soil deswamping, the degree of reduction was more remarkable.The organic matter content in surface horizon increased from 3.80% to 10.1% in Four Lake region, and from 4.32% to 14.4% in Lixiahe regoin after senile lake became swamp, but declined by 35 per cent in younger deswamping soil, by 47 per cent in deswamped soil in Four Lake region, and by 58 per cent in deswamped soil in Lixiahe region. The changes in organic matter content in gleying horizon were similar to surface horizon,but the degree of decrease was greater than surface horizon in deswamped soil, and slighter than surface horizon in younger deswamping soil.The date from incubation experiment indicated that the reduction potential was in a close relation to content of organic matter. Organic matter content was negative correlation with Eh value,and positive correlation with reductive substances.

本文研究了湖北四湖地区和江苏里下河地区沼泽化的湖泊、沼泽与稻田生态系统演化中土壤有机质含量的变化规律及其同还原能力的关系。结果表明,土壤有机质含量的变化极有规律。从湖泊生态系统演化为沼泽生态系统时,土壤有机质含量显著增高。四湖地区表层土壤由3.80%增加到10.1%,里下河地区亦由4.32%变为14.4%。而当沼泽被开垦利用,演化为稻田生态系统时,土壤有机质含量又迅即下降,并随着开垦时间及土壤脱沼程度的增加,而下降的幅度增大。四湖地区初期脱沼土表层土壤下降了35%,脱沼土则下降了47%,里下河地区亦下降58%。潜育层土壤有机质含量的变化趋势与之相似,土壤的还原能力与有机质含量呈密切的正相关。

Current situation and prospect of the studies on the loading capacity of soil for pollutants (LCSP) are briefly introduced in this paper. The values of LCSP which are based at present on the "black box" theoretics or take the "total amount" and "availability" as starting points are reviewed. The main problems existing in the present studies are described as follows. (1) there is a lack of long-term experimental results. Tests with wetland rice as an index for four years in succession showed that the significant...

Current situation and prospect of the studies on the loading capacity of soil for pollutants (LCSP) are briefly introduced in this paper. The values of LCSP which are based at present on the "black box" theoretics or take the "total amount" and "availability" as starting points are reviewed. The main problems existing in the present studies are described as follows. (1) there is a lack of long-term experimental results. Tests with wetland rice as an index for four years in succession showed that the significant difference of the LCSP value among the years appeared in the same soil. The coefficient of variability reached 51—66% and the highest value was 3.2—4.6 times as much as the lowest one. Therefore the reliable values of LCSP should be acquired from the long-term experiment in a fixed region, and the lowest value is the appropriate one. (2) There is certain limitation in the choosing of chemical compounds. For instance, the marked differences were found in the yield decrement and the amount of As absorbed by rice plant at the same concentration of As added with various compounds. So, the choice of appropriate chemical compounds, or the amendment of difference among the compounds used, remains to be further studied. (3) The experiments of combination pollution of heavy metals are scarce. For example, the experiments of combination pollution of Pb, Cd, Cu, Zn and Ni showed that the value calculated from single element was only an "apparent value" or "apparent LCSP (ALCSP)" and should be amended to the "practical LCSP (PLCSP)" with the following empirical amendment equation:PLCSP=ALCSP×C~(1/n)_s/∑C~(1/n)_iwere C. , n and C_j are the "apparent critical level" calculated with the test of single element, the oxidation number of the element and the concentration of Cu, Pb, Zn, Cd, Co and Ni in soil, respectively. The choice of the heavy metal concentration in the equation is well worth studying although a method is recommened in the present paper. The LCSP is not considered as a "fixed value" but a "range value" , and a continuous study is needful on this theoretical and practical problem.

本文简要地介绍了土壤环境容量研究的现状和展望,对当前以“黑箱”理论为基础或以“总量”与“有效态”关系为起点的容量值作了评论。认为这是一个表观值,提出容量值应为“范围值”并给出了以实验为基础的经验修正式。

 
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