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土壤变化
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  “土壤变化”译为未确定词的双语例句
    According to these indicators, and based on the investigation and statistics data from the big sample random sampling, the indicators about the population, land resources distribution, crops output, and the changing situation of GDP, water, soil, sandstorm disaster, and the wild animal population in the program region were systematically studied, and based on the results, the social, economical, and ecological benefits of the Grain for Green Program were objectively evaluated.
    根据这些评价指标,以大样本随机抽样的调查、统计数据为基础,分别对退耕还林工程区人口、土地资源分配状况、农作物产量和国民产值变化情况、水文变化、土壤变化、沙尘暴气候变化、灾害性气候变化、野生动物种群变化等指标进行了系统研究,在此基础上,对退耕还林工程的社会、经济、生态效益进行了客观评价。
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  soil change
There are five major hypotheses to explain the apparently synchronous, widespread, spectacular, specific, and sudden elm decline in north-west Europe - climatic change, soil change, competition, human impact, and pathogenic attack.
      
Properties of the soil change as the amount of water occupying the voids varies, and also because of structural change associated with management and with biological activity.
      
Appropriate relate to soil change and the dynamic nature of soil.
      
Integrating soil change in soil survey requires ad-In addition to the amount of C that could be restored, vances in the science of soil change.
      
Making new advances in soil friendly products related to soil change.
      
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The interaction of soil changes and climate changes at the global level is emphatically discussed in the paper. Some greenhouse gases, such as carbon dioxide, methane and nitrous oxide, especially the methane and nitrous oxide caused by soil physical, chemical and biochemical changes and land use changes, release to the atmosphere from the pedosphere. It exerts a significant effect on the global climate changes. Meanwhile, the global warming may lead to a more serious soil degradation that includes soil desertification,...

The interaction of soil changes and climate changes at the global level is emphatically discussed in the paper. Some greenhouse gases, such as carbon dioxide, methane and nitrous oxide, especially the methane and nitrous oxide caused by soil physical, chemical and biochemical changes and land use changes, release to the atmosphere from the pedosphere. It exerts a significant effect on the global climate changes. Meanwhile, the global warming may lead to a more serious soil degradation that includes soil desertification, acidification and salinization. Strengthening science propaganda to improve the environmental consciousness of people and reinforcing scientific research and monitoring to put forward some appropriate measures are important strategies for fitting or changing the global changes as stated above.

本文着重论述了“土壤变化”与“全球气候变化”之间的相互作用。土壤圈通过其内部一系列的理化、生化变化及土地利用变化等,产生CO_2、CH_4、N_2O等“温室效应”气体特别是CH_4和N_2O向大气的排放,对“全球气候变化”产生重要的影响,而全球气候变暖又会引起土壤沙漠化、酸化、盐渍化等退化过程的进一步加剧,严重改变人类生存的环境。加强科学宣传,提高全球民众环境意识,加强科学研究与监测,提出相应措施,是适应或改变上述全球变化的重要战略对策。

In this paper, we have researched the changes of swamp soil after the great fire event occurred on 6 May, 1987 in the Da Hinggan Mountain. It is revealed that the fire had severely effected the soil profile by burning away the organic matter in topsoil. Soil thermal situation has been changed, and soil temperature rise. Soil water content has been altered because the water reservation condition has been changed by the fire. Soil pH and the content of P2O5, K2O, CaO, MgO increase after the fire, on the contrary,...

In this paper, we have researched the changes of swamp soil after the great fire event occurred on 6 May, 1987 in the Da Hinggan Mountain. It is revealed that the fire had severely effected the soil profile by burning away the organic matter in topsoil. Soil thermal situation has been changed, and soil temperature rise. Soil water content has been altered because the water reservation condition has been changed by the fire. Soil pH and the content of P2O5, K2O, CaO, MgO increase after the fire, on the contrary, the organic matter content and N content decrease, the quantity of microorganism greatly increased after the fire. It is considered that the fire is beneficial to the development and genesis of swamp soil in this area.

通过对大兴安岭“6·5”森林火灾后沼泽土壤变化的研究表明,火灾对土壤的土体构型、物理性质、化学性质及微生物特征均产生了不同程度的影响,并且有利于沼泽土壤的发生发育.

The observed data of plant communities in 1984 and 2001 at 28 plots,and those of soils in 2001 at corresponding 24 plost of sandy grassland in Duolun County were analyzed by TWINSPAN(Two-way Indicator Species Analysis),DCA(Detrended Correspondence Analysis) and CCA(Canonical Correspondence Analysis).The results showed that according to the succession series in degradation,desertification or restoration,five vegetation types in the study area were classified.The succession series of plant communities was spatially...

The observed data of plant communities in 1984 and 2001 at 28 plots,and those of soils in 2001 at corresponding 24 plost of sandy grassland in Duolun County were analyzed by TWINSPAN(Two-way Indicator Species Analysis),DCA(Detrended Correspondence Analysis) and CCA(Canonical Correspondence Analysis).The results showed that according to the succession series in degradation,desertification or restoration,five vegetation types in the study area were classified.The succession series of plant communities was spatially similar both in 1984 and in 2001,furthermore,was also distinguished when the temporal dynamics was analyzed among 17 years.The grassland was degraded obviously at present days than in 1984.The succession of degradation,desertification or restoration of grassland plant communities showed some relationships with the changes of soil properties,while the changes of plant community were not coincident with those of soil properties when the temporal dynamics was taken into account. Soil texture,nutrients and organic matter changed slowly,compared with the changes of plant community.

应用TWINSPAN(two-way indicator species analysis)、DCA(detrended correspondence analysis)和CCA(canonical correspondence analysis)技术,对多伦县1984和2001年的28个样地草原植物群落调查数据及相对应的2001年的24个样地土壤调查数据进行分析。结果表明,研究区域的植物群落按照其退化、沙化或恢复演替序列可以分为5个阶段,不同时间的草原植物群落演替序列在空间格局上具有相似性,对比17年的动态变化,也呈现同一演替序列特征;与1984年相比,2001年研究区草原植物群落总体上有明显的退化迹象;草原植物群落退化、沙化或恢复演替与土壤变化具有一定相关性,土壤质地、养分和有机质变化在时间上较植物群落变化明显滞后。

 
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