盆栽模拟试验研究复配土15 cm土层地温的变化规律

Potted Plant Simulation Experiment to Study the Change of Soil Temperature in 15 cm Soil Layer

摘要: 以砒砂岩和黄土作为改良风沙土的材料，研究复配土的地温变化特征对研究毛乌素沙地水热平衡具有重要意义。本研究结果表明，地温随着日时刻数的增加均呈抛物线形变化趋势。春季和夏以16:00的温度最高，8:00的温度最低，升温最大幅度分别表现在8:00~10:00和10:00~12:00，两个季节均已18:00~20:00的降温幅度最大。秋季和冬季以14:00的温度最高，8:00的温度最低，升温最大幅度和降温最大幅度规律则一致，分别表现在10:00~12:00和16:00~18:00。在春季和秋季，当砒砂岩与沙复配比为1:1时其对15 cm土层温度的缓冲作用较好，在夏季和冬季，当砒砂岩与沙复配比为1:2时其对15 cm土层温度的缓冲作用较好。

Abstract: Using soft rock and loess as materials for improving the aeolian sandy soil, studying the characteristics of the ground temperature variation of the compound soil is of great significance for studying the water-heat balance of the Mu Us sandy land. The results of this study show that the ground temperature changes in a parabolic shape with the increase of the number of hours. Spring and summer have the highest temperature at 16:00 and the lowest temperature at 8:00, and the maximum temperature increases are shown at 8:00 - 10:00 and 10:00 - 12:00, respectively. In both seasons, the cooling rate has been the largest at 18:00 - 20:00. Autumn and winter are the highest at 14:00 and the lowest at 8:00. The maximum temperature increase and the maximum temperature decrease are consistent, showing at 10:00 - 12:00 and 16: 00-18: 00, respectively. In spring and autumn, when the ratio of sandstone to sand is 1:1, it has a good buffer effect on the soil temperature of 15 cm. In the summer and winter, when the ratio of the sandstone to sand is 1:2, it has a good buffer effect on the soil temperature of 15 cm.