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土壤导热率
相关语句
  soil thermal conductivity
     The soil thermal conductivity for the ridge of NT was 0.22, 0.25 and 0.3 W·m-1·C-1 higher than under earth furrow of NT, CT and RT.
     免耕垄背土壤导热率较免耕垄沟、翻耕、旋耕高0.22、0.25和0.3 10~(-3) W·m~(-1)·℃~(-1)。
短句来源
     the original soil thermal conductivity scheme is replaced by Johanson scheme and the soil thermal and hydraulic properties is modi-fied depending on soil ice content.
     并使用Johanson的方案替代了模式中原有的土壤导热率的参数化方案,考虑了含冰量对土壤水热性质的影响。
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  “土壤导热率”译为未确定词的双语例句
     Increase of organic matter content may also decrease thermal conductivity.
     土壤有机质的增加也会使土壤导热率减小;
短句来源
     The heat conductivity of soil changed a little in differentecosystems and various seasons, but the regularity was not apparent.
     土壤导热率在不同的林分和不同的季节中有所变化,但其变化的规律不明显;
短句来源
     The results have shown that to certain soil, the relationships between thermal conductivities and water content can be expressed by power function.
     研究结果表明 ,对特定土壤而言 ,土壤导热率与含水率之间可建立幂函数关系 ; 砂粒、粉粒和粘粒含量对土壤热性质有不同程度的影响 ;
短句来源
     In this paper, with radiative data observed and 0cm soil temperature at Wudaoliang weather station cooperated with deeper soil temperature observation nearby, the soil heat condition is analyzed at aspects such as soil temperature gradient ( Gra ) , soil heat flux (H2), soil heat conduction rate ( A ) , surface net radiation ( B), melt depth of seasonal frozen earth ( Md) and the variation of earth temperature at 2.0m ( T,2) .
     利用五道梁1994-1999年之辐射观测资料及0cm地温资料,结合五道梁附近的较深层的地温观测资料,从土壤温度梯度、土壤热通量、土壤导热率、地表净辐射、季节性冻土的融化深度以及2.0m地温的变化等方面分析了五道梁地区的土壤热状况。
短句来源
     the value of λ with two peaks, the largest peak is at Apr., the second large is at Sep.;
     (3)土壤导热率呈双峰型,4月份最大,9月份次大;
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  相似匹配句对
     And thus function could not be ignored in the soil water and salt movement and redistribution in saline grassland.
     土壤含水.
短句来源
     soil fertility;
     土壤肥力;
短句来源
     Increase of organic matter content may also decrease thermal conductivity.
     土壤有机质的增加也会使土壤导热率减小;
短句来源
     The main results included:1. Soil properties such as bulk density, water retentiveness and thermal conductivity under NT was higher than that of CT and RT.
     1.免耕耕层土壤容重高,持水性强,导热率高。
短句来源
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  soil thermal conductivity
Soil thermal conductivity increases as a power function of soil moisture content.
      
An insignificant variation of soil thermal conductivity is observed at 20°C, within a water pressure head ranging from 1?×?103 to 1?×?103?m, while for higher temperatures (45-50°C) from 5000 to 100000?m.
      
The soil thermal conductivity Ks depends on soil properties such as soil type, soil wetness and soil cover.
      


During the period of May--June, 1984, observations were made to inve-stigate the characteristics of radiation balance, heat balance and micro-climate in the mountainous orchard with and without plastic film mulchin Mengyin County, Shandong Province.The results of the observations were summarized as follows:1. The film mulch increased the radiation balance during daytime andreduced it at night.2. The film mulch reduced the soil evaporation and the net radiationwas mainly consumed in the plant transpiration.3...

During the period of May--June, 1984, observations were made to inve-stigate the characteristics of radiation balance, heat balance and micro-climate in the mountainous orchard with and without plastic film mulchin Mengyin County, Shandong Province.The results of the observations were summarized as follows:1. The film mulch increased the radiation balance during daytime andreduced it at night.2. The film mulch reduced the soil evaporation and the net radiationwas mainly consumed in the plant transpiration.3 The plastic film mulch changed the thermal properties of soil. Theheat capacity, the thermal conductivity and thermal diffusivity of thesoil were higher in the orchard with film mulch than that without film. The film mulch resulted in a significant inerease of. yield and wasproved to be a quite effective agricultural measure modifying the micro-climate in the mountainous orchard.

根据1984年5~6月在山东蒙阴山地果园内的地膜覆盖与无覆盖的辐射平衡、热量平衡的小气候的观测,对辐射能与热能收支作了计算和分析,得到下列初步结果: 1.覆膜增大了白天的辐射平衡而减小了夜间的辐射平衡。2.覆膜减少了土壤蒸发,净辐射主要用于植株的蒸腾。3.覆膜改变了土壤热性质。土壤热容量、土壤导热率和土壤导温率都比无覆盖的大。地膜覆盖显著增加产量,为一种有效改善山地果园小气候的农业措施。

This paper has discussed the heat balance in Chinese Fir plantation ecosystem. The heat transfer and balance is special by comparing with others. The canopy reflection rate varies between 0.15—0.25 and changes at different season with maximum from August to September, minimum in February, The ecosystem evapotranspiration cost 80% net radiation, Diurnal change of the net radiation is great, and heat transfer rate of soil is affected by soil water content.

本文分析研究了杉木人工林的热量收支平衡的各个分量。结果表明:杉木人工林林冠反射率的年变化为0.15—0.25,最大值在一年中的8—9月份,最小值在2月份。系统的蒸发散消耗掉了净辐射80%的能量。对于净辐射的日变化来说,林内较林外大。并且一日中,林内的正净辐射时间集中。林内净辐射的日变化曲线上来看,净辐射增加和减小都很剧烈,这样使得林内在一天中10点钟以前很凉爽,以后,很快变得闷热,16点以后,闷热感又很快消失。土壤导热率受着季节性变化的影响,特别受着水分含量的影响。

Based on consecutive measurement from 1981 - 1990 at Xiaoliang ExperimentalStation in Guangdong, the energy balance in three ecosystems, mixed forest, eucalyptus forest and bare land, was studied comparatively. The reflection rate to solar radiation wasin the order bare land>eucalyptus forest >mixed forest. The net radiation (NR) on bareland was 1.57 times of that on mixed forest and eucalyptus forest. The energy dissipationby evapotranspiration was 95% of NR for mixed forest, 59% of NR for eucalyptus forestand...

Based on consecutive measurement from 1981 - 1990 at Xiaoliang ExperimentalStation in Guangdong, the energy balance in three ecosystems, mixed forest, eucalyptus forest and bare land, was studied comparatively. The reflection rate to solar radiation wasin the order bare land>eucalyptus forest >mixed forest. The net radiation (NR) on bareland was 1.57 times of that on mixed forest and eucalyptus forest. The energy dissipationby evapotranspiration was 95% of NR for mixed forest, 59% of NR for eucalyptus forestand 70% of NR for bare land. The heat conductivity of soil changed a little in differentecosystems and various seasons, but the regularity was not apparent. Annual heat flowthrough soil was nearly balanced for bare land, which differed from that for mixed forestand eucalyptus forest. As a whole, the heat environment was best in mixed forest andworst in eucalyptus forest, which was shown by that the output of energy from the mixedforest was mainly through evapotranspiration and that from the eucalyptus forest wasmainly through air movement. This is why the micro-climate in mixed forest is warm andwet but that in eucalyptus forest is hot and dry.

1981年-1990年对混交林、按树林、裸地三种生态系统进行了连续观测,对其能量平衡问题进行了对比研究。结果表明对太阳辐射的反射率以混交林的最小,桉树林次之,裸地的最大;裸地的净辐射值是桉树林和混交林第二作用层的1.57倍,这反映出林冠对太阳辐射进入林内的阻碍;混交林、桉树林和裸地的蒸散耗热分别占净辐射的95%,59%和70%;土壤导热率在不同的林分和不同的季节中有所变化,但其变化的规律不明显;土壤的热量通量在年内的平衡状况以裸地最好,年内就已基本平衡,混交林内的热量通量年内差额最大。整个混交林系统的热量平衡支出项主要为蒸散,小气候以温暖湿润为基本特征,按树林和裸地的热量平衡支出项主要靠乱流交换,常常以高温干旱的小气候为主。

 
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