中文摘要：

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0．110cm），流动沙地和樟子松林地分别为0．120和0．128mm．

英文摘要：

Weighing method was adopted to study the formation time and the amount of soil condensation water in four habitats （mobile sandy land, fixed sandy land, farmland, and Mongolian pine forest land） in Horqin Sandy Land in August 2007. The soil condensation water began to form at 20：00-22：00, increased gradually at 22：00-4：00, and began to evaporate after 4：00. In the four habitats, soil condensation water was mainly formed in 0-9 cm layer, and the amount was the greatest in 0-3 cm layer, accounting for 40% of the total. The soil condensation water also formed in 9 -30 cm layer, but in very small amount. There was a greater difference in the mean daily amount of soil condensation water in 0-3 cm layer in the four habitats, with the sequence of fixed sandy land 〉 mobile sandy land 〉 farmland 〉 Mongolian pine forest land, which indicated that the habitat with better vegetation condition was not benefit the formation of soil condensation water. The mean daily amount of soil condensation water in 0-30 cm layer was 0. 172 mm in fixed sandy land, 0. 128 mm in Mongolian pine forest land, 0. 120 mm in mobile sandy land, and 0. 110 mm in farmland.