季节性冻融土壤入渗的影响因素分析

Analysis on Factors of Influencing Infiltration of Seasonal Freeze-thaw soil

文中通过大量的入渗试验,对不同地表条件下季节性冻融土壤入渗的影响因素——地温和土壤含水率进行了对比分析,结果表明:未灌水的不同地块土壤入渗能力主要受地温控制,地表有覆盖物的土壤入渗能力与地温的变化趋势接近,而无覆盖物的相对较差;不同时间灌水后土壤的入渗能力主要受土壤含水率的控制,秸秆覆盖地块的土壤入渗能力与土壤含水率的相关程度较裸露地块弱。

Through a large number of field infiltration tests, this article analyses the influence of two factors-soil temperature and soil moisture content-on the infiltration capacity of seasonal freeze-thaw soil under different surface treatments. The test results indicate that： the soil infiltration capacitys of different non-irrigation plots are mainly determined by soil temperature, the change trend of soil infiltration capacity of mulched plots is similar to the trend of temperature, but they are not so similar in the bare plots. The soil infiltration capacity under different irrigation scheduling is mainly controlled by soil moisture content. The correlation degree between soil infiltration capacity and soil moisture content in the plots mulched by corn straw is less than in bare plots.