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desert ecosystem     
相关语句
  荒漠生态系统
     Difference of Desert Ecosystem Responses to Elevated Atmospheric CO_2 Concentration between Dry and Wet Years
     荒漠生态系统对大气CO_2浓度升高响应的干湿年差异
短句来源
     Quantitative studies on changes of decomposition rate,C/N ratio,N,K and organic C of corn residue during decomposition in desert ecosystem were carried out in Fukang,Xinjiang.
     以玉米秆为材料,研究了荒漠生态系统下残茬的腐解率和腐解物的有机C、N、K的含量、养分释放率及C/N的变化。
短句来源
     Rodents have evolved a series of physiological, morphological, and behavioral characteristics to adapt the asperity of desert environment, and their excavating and feeding activities also deeply affect the environment of desert ecosystem.
     鼠类作为生物干扰的重要代表,是荒漠生态系统斑块形成的主要来源,它们已从生理、形态、行为进化出一系列特点适应了荒漠生态系统的严酷环境,同时其挖掘、采食行为也深刻影响着荒漠生态系统的环境。
短句来源
     Identification of Characteristics of Informational Linkage between Organisms in Desert Ecosystem.
     荒漠生态系统中生物的信息联系特征
短句来源
     In the evolution process,the other types of ecosystem transfer to the desert ecosystem. They are the cushion half-shrub desert ecosystem andshrub desert ecosystem,their areas are 12.20 ×10~(4)km~(2)and 12.16× 10~(4)km~(2) respectively.
     在其他类型向荒漠生态系统演替过程中,转移面积最大的和最多的是垫状小半灌木(高寒)荒漠和灌木荒漠,面积分别为12.20×104km2和12.16×104km2。
短句来源
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  荒漠生态
     Quantitative studies on changes of decay rate, nutrients releasing rate, C/N ratio, and contant of N, K and organic C of soybean residue during decomposition in arid desert ecosystem were carried out in Fukang, Xinjiang.
     以大豆秆为材料研究了荒漠生态条件下残茬的腐解率、腐解物的有机C、N和K的含量、养分释放率和C/N比的变化。
短句来源
     400-432℃ exothermic peak in DTA curve of remainders and 460-490 ℃ weight loss peak in DTG curve appeared at the decaying process in oasis ecosystem, but didn't appear in desert ecosystem.
     绿洲生态条件下,腐解过程中玉米秸和大豆秸的DTA曲线中出现了400-432℃的小放热峰,DTG曲线中出现了460-498℃的小失重峰,而荒漠生态条件下则没有出现。
短句来源
     The characteristics of decomposition and variation ofnutrient elements of plant residue in desert ecosystem
     荒漠生态条件下植物残体的分解特征和养分变化
短句来源
     The decaying rate of corn straw adding N was higher than that of soybean straw, and the decaying rate in oasis ecosystem was higher than in desert ecosystem.
     加氮玉米秸的腐解速率大于大豆秸的腐解速率,绿洲生态条件下的腐解速率大于荒漠生态条件下的腐解速率。
短句来源
     The Decomposition of Residue and Nutrient Releasing Under the Condition of Desert Ecosystem
     荒漠生态条件下植物残体分解和养分释放的研究
短句来源
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  荒漠草原
     Nesting behavioral of seed harvester ant Messor aciculatus in the desert ecosystem of northwest China.
     西北荒漠草原针毛收获蚁的筑巢行为
短句来源
     Messor aciculatus (F. Smith) is a dominant seed harvester ant in the desert ecosystem of northwest China. It harvests more than 10 annual plant seeds.
     针毛收获蚁Messoraciculatus(F .Smith)是我国北方特别是西北荒漠草原的优势种蚂蚁 ,亦是重要的种子收获性蚁类 ,收获、贮藏和取食 1 0余种荒漠植物种子。
短句来源
  沙漠生态系统
     Study on Insect Community Niche under Different Desertification Controlling Approaches in Tengger Desert Ecosystem
     腾格里沙漠生态系统不同固沙方式下昆虫群落的生态位分异研究
短句来源
     Effect of Macrofauna on the Material Circulation in Tengger Desert Ecosystem
     大型土壤动物在沙漠生态系统物质循环中的作用研究
短句来源
     Among the 65 species, 42 species were found in desert and semi\|desert area, 41 in residential areas and 43 in sand\|fixing forests. But the bird species, density and seasonal variety in each landscape were significantly different. These species of bird play a significant role in the modified desert ecosystem.
     虽然各景观中分布的鸟类物种数差异不大 :荒漠半荒漠景观 42种 ,居民点景观 41种 ,人工林景观 43种 ,但各景观中的鸟类种类、密度和季节性变化差异显著 ,在促进沙漠生态系统良性循环中具有重要的作用
短句来源
     Based on surveys of invertebrate communities by quadrat sampling method, it was studied that the construction of invertebrate communities and the features of functional groups in Tengger desert ecosystem. Also, the niches of main animal groups and the niche overlap between main animal groups were calculated.
     利用样方法研究了腾格里沙漠生态系统无脊椎动物的群落组成和以生活方式划分的功能群的特征 ,并计算了主要动物类群的生态位宽度及各类群间的生态位重叠。
短句来源
     It was suggested that the change of nematode community composition was indicative of the restoration of the desert ecosystem.
     本实验结果表明,土壤线虫群落结构对退化沙漠生态系统的恢复阶段具有很好的生物指示作用。
短句来源

 

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      desert ecosystem
    Management regimes affect woody plant productivity and water use efficiency in an urban desert ecosystem
          
    The north-western part of India is occupied by a desert ecosystem, the Thar Desert.
          
    Honey mesquite (Prosopis juliflora), a representative species of the Sonoran Desert ecosystem, was studied as a possible bioindicator for industrial smelter pollution.
          
    Plant induced fertile islands as possible indicators of desertification in a succulent desert ecosystem in northern Namaqualand,
          
    For a desert ecosystem, the region is characterized by a unique selective regime, namely highly predictable annual rainfall and a moderate temperature regime throughout the year.
          
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    This paper approaches the self-organizaticn process of natural ecosystemand landscape forming causes in Chaidamu Basin based on Systematic Theory,Control Theory and Dissipative Structure. It points out that moisture importis the most important control factor in whole self-organization process. Theself-organization regards specified water-heat balance as its control object. Thesustained unstable evolution of the natural ecosystem in Chaidamu Basin caus-es from entropy increase and water-heat balance fluctuation...

    This paper approaches the self-organizaticn process of natural ecosystemand landscape forming causes in Chaidamu Basin based on Systematic Theory,Control Theory and Dissipative Structure. It points out that moisture importis the most important control factor in whole self-organization process. Theself-organization regards specified water-heat balance as its control object. Thesustained unstable evolution of the natural ecosystem in Chaidamu Basin caus-es from entropy increase and water-heat balance fluctuation is magnifiedthrough matter and energy exchange to outside. The regional succession climaxesare desert-desert grass ecosystem. Establishing oasis agricatural ecosystem is aeffective way to improve the effect of dry desert ecosystem in Chaida mu Basin.

    本文运用一般系统论、控制论和耗散结构理论,对柴达木盆地自然生态系统的自组织过程及其景观成因进行了探计。提出在其整个自组织过程中,最主要的控制因素为水分输入,并且是以特定的水热平衡作为控制目标来进行自组织的。盆地自然生态系统相继的不稳定性演化是由于总熵值增大、水热平衡的涨落被放大并通过与外界交换物质和能量而获得的最终稳定。演替的区域顶极为荒漠——荒漠草原生态系统。建立绿洲农业生态系统是提高柴达木盆地干旱荒漠生态系统功效的有效途径。

    A proposal concerning that closed forage herbs and shrubs in the desert areas should be used by grazing was put forward according to the observations at fixed site and investigations. Of all using ways , the grazing is optimum way. The closed regings where utilization is totally prohibited have been a tremendous waste of the vegetation resources in the desert areas. The functions of the closing and the desert ecosystems will not be disturbed so long as the grazing is reasonable. On the contray,...

    A proposal concerning that closed forage herbs and shrubs in the desert areas should be used by grazing was put forward according to the observations at fixed site and investigations. Of all using ways , the grazing is optimum way. The closed regings where utilization is totally prohibited have been a tremendous waste of the vegetation resources in the desert areas. The functions of the closing and the desert ecosystems will not be disturbed so long as the grazing is reasonable. On the contray, the reasonable utilization by grazing is conducibe to the control of desertification and over-grazing of other regions because of the rducing of the pressure upon the non-closed desert rangelands , and also promoting the development of the livestock husbandry in the desert areas, increasing the growth of the plants in the exclosures , enabling the closing more effective and maintaining the ecological equilibrium. The utlization of the closed forage herbs and shrubs must be reasonable and rational.

    根据调查与观测结果,认为荒漠地带的封沙育草区应适当加以利用。在各种利用方式中,放牧是最佳的利用方式。并探讨了放牧利用中应注意的一些问题。

    From Tang dynasty, the ecosystem in Ordos plateau began to worsen distinctly and then turned into desert-ecosystem. Unreasonable reclamation had directly, or indirectly brought out and accelerated desertification. The best way for the modern agri-cultural construction in Ordos plateau is to combine harnessing with exploitation. It is also possible and necessary to adjust man-land ratio and agricultural distribution, and bring all kinds of techniques into full play. Runoff agriculture can be...

    From Tang dynasty, the ecosystem in Ordos plateau began to worsen distinctly and then turned into desert-ecosystem. Unreasonable reclamation had directly, or indirectly brought out and accelerated desertification. The best way for the modern agri-cultural construction in Ordos plateau is to combine harnessing with exploitation. It is also possible and necessary to adjust man-land ratio and agricultural distribution, and bring all kinds of techniques into full play. Runoff agriculture can be set up in the areas where the irrigation conditions are poor.

    历史时期,鄂尔多斯高原的农业开发,以汉、唐、清三代最为恢宏。从唐代开始,该区的生态环境明显恶化,渐向沙漠生态转变。不合理的农业开发通过直接与间接的作用,诱发、促进了沙化的发生发展。鄂尔多斯高原的现代农业开发,应以史为鉴,走治理与开发相结合的道路,重新分配人口,安排生产。同时,要充分发挥、协调各种科学技术的生态、经济作用。在缺乏灌溉条件的地区,可发展径流农业。

     
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