The characteristic curves of soil freezing and thawing reflect the strength, thermal properties and water and solute transport regularity.
土壤冻融特征曲线是反映土壤冻融过程中的水、热、盐迁移规律以及冻土强度、冻土的热性质的重要参数。
The effect of alternative freezing and thawing can enhances the activities of some soil enzymes greatly, such as phosphatase, nitrate reductase and nitrite reductase.
冻融交替作用明显地增强土壤中磷酸酶、硝酸还原酶和亚硝酸还原酶的活性。
The wind erosion hazard is often intensified by the poor vegetation cover and loosen surface soil due to the freezing and thawing over winter.
春季风大风多，降雨量少，气候侵蚀力高，地表植被覆盖率低，土壤表层由于冻融作用变的松散，是一年最易风蚀的季节。
The thermo dynamics mechanism of water and salt transportation in the salined wetland during the freezing and thawing period is substantial to the geographical occurrence mechanism of salinized soil.
冻融期间盐沼湿地水盐迁移的热力学机制是松嫩平原土壤盐化发生机制的重要组成部分。
Freezing and thawing of soil moisture is accompanied with a series of physical processes in seasonal freezing-thawing areas, such as moisture transfer and heat exchange.
在季节性冻土分布区，土壤水分的冻结和融化必将会伴随着热量交换、水分迁移等物理过程。
The above results show that, the effect of alternative freezing and thawing has a great influence on the soil organic matter, soil nitrogen, soil potassium and some soil enzymes.
上述研究结果说明，冻融交替作用对黑土土壤有机质、氮钾和酶活性产生重要影响。
It was also shown that there was an inverse correlation between the speed of temperature variation and the initial water content for freezing soil, but no monotonic correlation for the thawing soil.
试验结果还表明：正冻土温度变化速率与其初始含水率间存在反相关性，而正融土温度变化速率与其初始含水率间无单调相关性。
After the experiment and the theoretical analysis, have established the reflection freezing and thawing to the soil body constitutive property influence dynamic constitutive parameter.
经过试验和理论分析，得到了反映冻融对土体结构性影响的动态结构性参数。
The experiments results show that the effect of alternative freezing and thawing has a great influence on the organic matter, nitrogen nutrition, potassium nutrition and soil enzyme activities.
研究结果表明，冻融交替作用对黑土有机质、氮钾及酶活性产生重要的影响。
This thesis put up the freezing-thawing mechanics of soft rock basing on the frozen soil which has developed. The problems involved and proposed problems need to solve have all pointed out.
本文在冻土力学的基础上将软岩冻融力学作为一个课题提出来，并具体指出它所包含的内容与拟解决的关键问题，针对西部特殊环境具体的解决冻融环境的变化对岩体，特别是软弱岩体的稳定性影响。
The study showed that freezing and thawing alternation had a significant influence on soil nitrogen pool in the alpine meadow.
上述研究表明，冻融交替对高寒草甸土壤氮素有显著影响。
The study showed that freezing and thawing alternation had a significant influence on soil nitrogen pool in the alpine meadow.
上述研究表明，冻融交替对高寒草甸土壤氮素有显著影响。
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