摘要
通过对科尔沁沙地 3种类型风沙土中地温的变化特征分析 ,有植被覆盖和裸露地表条件下地温的关系探讨。结果表明 :1地温随时间进程有明显的日变化规律 ,随深度加深地温日变化振幅按指数规律减小 ;2半固定风沙土的浅层 (5～ 2 0 cm)地温略高于流动风沙土和固定风沙土 ,尤其表现在地温达到最大值时 ;3流动风沙土土壤热扩散率 λ较大 ,固定风沙土土壤热扩散率 λ较小 ;4有植被覆盖的风沙土中平均地温略高于裸露地表下的平均地温。
In this paper, the characteristics of soil temperature in three types of aeolian sandy soils in Horqin sandland were analyzed, and the soil temperatures were measured in planted ground and bare ground. The results are as follows: ① the soil temperature changed distinctly with the change of the time and the depth; ② the soil temperature in semi fixed aeolian sandy soil was slightly higher than that in shifting and fixed ones, especially at the time when soil temperature reaches the maximum; ③ the value of thermal diffusivity of mobile aeolian sandy soil was larger than that of fixed aeolian sandy soil; ④ average soil temperature in planted ground was slightly higher than that in bare ground.
出处
《中国沙漠》
CSCD
北大核心
2000年第S1期43-45,共3页
Journal of Desert Research
基金
国家"973"项目! ( G19990 43 4 0 0 )
国家"九五"攻关项目! ( 96-92 0 -13 -0 2 )
院特别支持项目 !( KZ95 T-0 4
KZ95 1-A1-3 0
关键词
科尔沁沙地
风沙土
地温
土壤热扩散率
Horqin sandland
aeolian sandy soil
soil temperature
thermal diffusivity
