摘要
对不同质地的土壤失水干燥的动力学过程进行了试验研究.结果表明,不同质地土壤失水干燥过程存在3个阶段:稳定失水阶段、快速失水阶段和土壤干燥阶段;设定干燥温度和土壤的初始含水率对失水干燥速率有较大的影响,设定温度越高,失水速率越大,土壤由湿变干越快,初始含水量越大,土壤由湿变干的时间越长;在同一的温度和初始含水量条件下,失水干燥速率与土壤质地无关;土壤失水干燥的动力学曲线可用二次多项式进行描述.
Soil dryness dynamic process was investigated in different soil texture by the method of heating and weight with the electric moisture balance. The results showed as follows：There were three stages in soil dryness process that is stable dryness stage, soil moisture quick decrease stage and soil dryness stage. There were obvious effect of set dryness temperature and soil initiative moisture on soil dryness rate, the rate of soil dryness increase with increase of heated temperature, there was long time for soil dryness with increase of soil initial moisture. There was no obvious relation with soil dryness rate and soil texture. Soil dryness dynamics curves can be described by parabola equations.
出处
《应用基础与工程科学学报》
EI
CSCD
2006年第3期333-339,共7页
Journal of Basic Science and Engineering
基金
国家自然科学基金(50579066)
关键词
蒸发
失水速率
土壤质地
动力学曲线
evaporation
dryness rate
soil texture
dynamics curves
