查询词典 surface of the soil

Considering the bounding surface plasticity constitutive model of soil, the program, named as WSDP, is coded to analyse the dynamic elastoplastic responses of two-dimensional soil layer.

讨论土体本构关系、土层应力历史状态、人工边界的设置以及为消除人工边界高频振荡而采用的黏性阻尼等因素对土层动力反应的影响。

Then, the differential equations are solved by the Fourier expanding and Hankel integral transform method. Integral solutions of soil skeleton displacements and pore pressure as well as the total stresses for poroelastic media are obtained. Furthermore, a systematic study on Lamb's problems in transversely isotropic saturated half-space is performed. Integral solutions for surface radial, vertical and tangentical displacements are obtained both in the case of drained surface and in the case of undrained surface excited by vertical and tangentical harmonic resources respectively. Numerical results show the obvious difference between the model of isotropic saturated poroelastic media and that of transversely isotropic saturated poroelastic media.

其次，基于Biot波动理论，在圆柱坐标系下求解了横观各向同性饱和土的Biot波动方程：通过引入位移函数，在圆柱坐标系下将横观各向同性饱和土的Biot波动方程转化为两个解耦的6阶和2阶控制方程，然后根据方位角的Fourier展开和径向Hankel变换，求解波动方程，得到以土骨架位移和孔隙水压力为基本未知量的积分形式一般解，并用一般解给出了饱和土总应力分量的表达式；再以基本解为基础，系统地研究了横观各向同性饱和半空间体的Lamb问题，考虑表面排水或不排水两种情况后，首次得到横观各向同性饱和半空间体在表面竖向和水平谐振力作用的下径向、竖向和周向位移的解析解。

Compared with the significant variation of temperature of free air and of surface soil, soil temperature at different depths varies in the range.

文章进一步揭示了林地植被平抑这种动态效应，而裸地则响应于温度变化；这种不同植被系统下的动态差异在解释岩溶沉积记录和讨论岩溶作用与碳循环的关系时值得充分注意。

Fertilizing date presented obvious effects on root growth and distribution. Fertilization after watering was more primitive to the root in up-soil layers than before watering. Fertilization of Ca-Mg was positive to the increase of root in 5-15cm soil layer, but negative to that in the surface layer. Both fertilization date and Ca-Mg fertilizer affected root vigor obviously.

施肥时期对根系也具有明显的影响，与灌水前施肥相比，灌水后施肥有利于促进根系在上层土壤中的生长和分布；钙镁肥的施用能增加5~15cm土层根重，但对表层根的生长不利，施肥时期和钙镁肥施用与否对根系活力的影响也较大。

Has weak activation and transfer under acid rain effect and redeposition will take place during the course of their moving from surface soil to deep soil.

酸雨作用下离子的迁移过程客观存在，这一点从土壤电导率研究结果中得到了确认。

Revisal coefficient models of moisture were rectified in different extents of water using on the basis of dynamic monitor data of soil moisture, surface runoff and superficial ground water, and moisture revisal coefficients in different conditions of nature and fully utilization of surface runoff and superficial ground water.

在实地动态监测耕地土壤水分含量的基础上，修正建立水分订正系数模型，并计算出龙何屯自然条件下的水分订正系数。

However, those decreased in secondary forest dominated by Alchornea trewioides, Mallotus conspuyrcatus, Eurycorymbus cavaleriei with lower species diversity. The SOM contents in rock-soil (110 g kg-1) and soil surface microhabitat (77 g kg-1) in gentle slope decreased significantly, which were only 32% and 35% of that in primary forest, respectively; but there were not significant differences in SOM, TN and AN contents in depression between the two vegetations.

以红背山麻杆、广西野桐、伞花木等为优势种的次生林，物种多样性较原生林低，SOM、TN、AN含量也低，缓坡石土面和土面小生境的SOM分别为110 g kg-1和77 g kg-1，是原生林的32%和35%，下降幅度最大，其次为陡坡，而洼地的差异不明显。

Vent were studied in this experiment based on scanner-based image analysis. The results showed that drought and AM inoculation had a large, significant effect on plant development. Biomass, total length, surface area, volume, number of root nodes, average diameter and fractal dimension of root system in Broussonetia papyrifera Vent decreased with the reduction of soil moisture, while they were increased by AM inoculation. Special root length in non-AM plants increased when soil moisture was reducing, but it was decreased by AM inoculation.

结果表明，土壤水分状况和接种菌根真菌对构树幼苗生物量积累产生了显著的影响；构树幼苗根系干重、总长度、表面积、体积、根节数目、根系平均直径和分形维数表现出随着土壤含水量的降低而降低，接种G.mosseae则使得该参数比同等水分条件下显著升高；未接种植株比根长SRL表现为随着土壤含水量的降低而升高，接种G.mosseae则降低了同等水分条件下构树幼苗的比根长；土壤水分和接种G.mosseae同样也对根节平均长度产生了影响。

Bare soil is protected from the impact of rainfall which can cause surface soil crusting, compaction, and erosion.

塑料薄膜覆盖使裸土免受降雨引起的表土结壳、压实和侵蚀。

On both the slopes maximum water holding capacity and porosity of surface soil and particle density at all soil depths were lower in orange orchard compared to those in forest.

与灌木林地比较，桔园地表层土壤最大持水量、孔隙度和3个不同深度的土壤密度均较低。

As she looked at Warrington's manly face, and dark, melancholy eyes, she had settled in her mind that he must have been the victim of an unhappy attachment.

每逢看到沃林顿那刚毅的脸，那乌黑、忧郁的眼睛，她便会相信，他一定作过不幸的爱情的受害者。

Maybe they'll disappear into a pothole.

也许他们将在壶穴里消失