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2007年8月采用称量法研究了科尔沁沙地4种生境(流动沙地、固定沙地、农田和樟子松林)土壤凝结水形成的时间以及凝结水的数量.结果表明:20:00—22:00间,研究区土壤凝结水开始逐渐形成,22:00—4:00时段的土壤凝结水波动增大,4:00之后土壤凝结水开始逐渐蒸发损失;科尔沁沙地4种生境0～9cm土层是土壤凝结水的主要形成层,其中,0～3cm土层所占比例最大,约占总凝结水量的40%,9～30cm土层仍有凝结水形成,但凝结水量较少;4种生境0～3cm土层的凝结水量在时间上存在较大差异,0～3cm土层日均凝结水量大小依次为固定沙地>流动沙地>农田>樟子松林,说明植被条件较好的生境反而不利于土壤凝结水的形成;0～30cm土层日均凝结水量以固定沙地最多(约0.172mm),以农田最少(为0.110mm),流动沙地和樟子松林地分别为0.120和0.128mm.
The formation time and the amount of condensate in four kinds of habitats (mobile sandy land, fixed sandy land, farmland and Pinus sylvestris var. Mongolica) in Horqin sandy land were studied by using the weighing method in August 2007. The results showed that: At 22:00, the soil condensation water began to gradually form in the study area, the soil condensation water fluctuation increased from 22: 00-4: 00, and the soil condensation water began to evaporate gradually after 4:00 hrs. 9cm soil layer is the main formation of soil condensation water, of which 0 ~ 3cm soil layer occupy the largest proportion, accounting for 40% of the total amount of condensate water, 9 ~ 30cm soil layer is still formed of condensate water, but less condensate water; There was a big difference in the time of condensate water in 0 ~ 3cm soil layer of four habitats. The daily average condensate water quantity in 0 ~ 3cm soil layer followed the order of fixed sandy land> mobile sandy land> farmland> Pinus sylvestris var. Mongolica, indicating that the vegetation condition is better (0 ~ 30cm), the average daily amount of condensate water in the 0 ~ 30cm soil layer was the highest in fixed sandy land (about 0.172mm), the lowest in farmland (0.110mm), the sandy land and Pinus sylvestris var. Mongolica forest were 0.120 and 0.128 mm.