体积含水量

当土壤体积含水量低于20%时土壤呼吸速率与之成正相关；若超过20%后土壤呼吸速率与之成显著负相关。

Respiration rate and soil moisture are positively correlated when soil volumetric water content under 20 % and negatively correlated when its content above 20 % .

各土层的水分特征曲线总的趋势是一致的，即随土壤水吸力的增加土壤体积含水量逐渐下降；

Tendencies of the soil water retention curves of all soil layers in three kinds of soil were similar , the soil volumetric water content decreased with the soil water suctions .

放射性同位素法测定路基土压实度时体积含水量偏值的估计分析

Estimation of moisture bias in measuring relative compactibility of roadbed soil materials by

土壤体积含水量表征土壤水分的模型精度相对要低。

The model precision by the soil volumetric moisture content was relative lower .

为确定岩土力学中的渗透系数，需考虑渗透系数与体积含水量之间的关系。

There are important research meanings about the relation between osmosis coefficient and volume water content in Geotechnical Mechanics .

对不同的土样进行了一系列的室内试验，试验表明，模型能很好地描述非饱和土介质介电常数与体积含水量之间的关系。

From the experimental results , it was found out that the relation curves of soil samples were almost consistent with each other and fittd the model well .

时域反射仪测定土壤体积含水量的准确度取决于两个关键因素：土壤介电常数的测定准确度以及土壤含水量和介电常数之间的关系模型。

The accuracy of soil water content measured by TDR depends on two key factors : soil dielectric constant and the calibration model of soil volumetric water content vs. dielectric constant .

当土壤体积含水量在14.8%～30.1%时候，对土壤电导率的影响及其显著，而且近似为线性关系。

When soil water content in every volume between 14.8 % to 30.1 % , it had a remarkable influence on soil conductivity , moreover it was approximate for the linear relationship .

旱季（11月～4月）0～180cm各层土壤体积含水量比对照高出2.91%～21.76%；

Moreover , soil volumetric water was 0.00 % ~ 45.15 % higher in the rain season ( from May to Oct. ) while 2.91 % ~ 21.76 % higher in the dry season ( from Nov. to Apr. )

结果表明，本模式能合理地模拟荒漠下垫面地表热量平衡、土壤体积含水量、地表植被蒸发散阻抗、地表水汽通量日变化和湍流交换系数、湍流动能、位温和比湿廓线等。

The results show that this model can reasonably simulate the diurnal variations of heat balance , soil volumetric water content , resistance of vegetation evaporation , flux of surface moisture , and profiles of turbulent exchange coefficient , turbulent momentum , potential temperature , and humidity mixing ratio .

降雨过程中体积土壤含水量和土壤水基质势的动态变化可划分为5个阶段。

Dynamic change process of volumetric soil water content and soil water matrix potential can be divided into five stages .

目的观察细冰合剂滴鼻对大鼠脑缺血再灌注脑梗死体积及脑含水量的作用。

Influence of the PPAR γ mRNA expression level on cerebral infarction volume in patients with acute cerebral infarction ;

土壤孔隙度表明土壤中空隙的体积，与含水量一起共同决定土壤中空气的含量，进而影响土壤中各种变化的进程和作物的生长。

Soil porosity represents the void spaces of soil , together with moisture content , determines the air content of soil , then influences the soil processes and plant growth .

本实验利用左大脑中动脉梗塞的大鼠模型，采用检查脑组织钙、脑梗塞体积、脑含水量及水迷路试验。

Using rat middle cerebral artery occlusion ( MCAO ) model , the calcium 、 water contents and the volume of cerebral infarction were measured , the water-maze test was also determined .

研究大鼠局灶性脑缺血再灌注时缺血区脑梗死体积、脑组织含水量、SOD活性、MDA含量、NF-κB、IκBα及MMP-9表达的变化。

To investigate the area of infarct , the water content , SOD activity , MDA content and the expressions of NF - κ B , I κ B α , MMP-9 in rats following focal cerebral ischemia-reperfusion .