中文摘要：

露水是在干旱、半干旱的区域的重要补充水来源。为了在土壤的不同类型上决定露水形成，与各种各样的灌木种类和 microhabitats 联系了，我们在稳定 revegetation 的干旱沙漠在 2009 年 10 月执行了积累的露水形成数量和持续时间的测量在 Shapotou 区域的生态系统，北中国。结果显示积累的露水形成数量作为与相比在空地大四倍在华盖下面，并且它是将近两倍多在生活 Artemisia ordosica 植物(L.A ) 下面与与相比比在生活下面，锦鸡儿属植物 korshinskii 种(L.C ) 。相反的特征被作出对有利的裁决在不同 microhabitats 之间的露水持续时间。在在灌木看台附近的不同垂直高度的露水数量在在华盖上面的 50 厘米的顺序 > 华盖边 > 在华盖下面。继续在黎明以后增加的露水数量，和平均积累的露水的比例在黎明财务以后总计因为平均最大的数量从在华盖上面增加了到在华盖下面。在日出以后的露水形成持续时间在白天期间占了超过 50% 全部的形成持续时间。与露水数量的分发特征相反，在黎明以后的露水持续时间和全部的露水形成持续时间在华盖下面最高在白天期间是两个，列在后面由在华盖边然后在在华盖上面的 50 厘米。在为全部的露水持续时间的黎明财务以后的露水持续时间的部分从在华盖上面在白天期间增加了到在华盖下面。从这些结果，我们可以为在水有限改进 microhabitats 作为一个补加的水资源结束那露水可获得性干旱生态系统为在不同看台层的植物 microhabitats 特别是位置依赖者。

英文摘要：

Dew is an important supplement water source in arid and semi-arid areas. In order to determine the dew formation on different kinds of soils associated with various shrub species and microhabitats, we performed measurement of accumulated dew formation amount and duration in October 2009 in a revegetation-stabilized arid desert ecosystem in Shapotou area, northern China. The results indicated that the accumulated dew formation amount was four times larger at open spaces as compared to under the canopy, and it was nearly twice as much under living Artemisia ordosica plants（L.A.） as compared to under living Caragana korshinskii plants（L.C.）. The opposite characteristics were found for dew duration between different microhabitats. Dew amounts at different vertical heights around the shrub stands were in the order of 50 cm above the canopy〉the canopy edge〉under the canopy. Dew amount continued to increase after dawn, and the proportion of average accumulated dew amount after dawn accounting for the average maximum amount increased from above the canopy to under the canopy. Dew formation duration after sunrise accounted for more than 50% of the total formation duration during the day time. Contrary to the distribution characteristics of dew amount, dew duration after dawn and total dew formation duration during the day time were both highest under the canopy, followed by at the canopy edge and then at 50 cm above the canopy. The portion of dew duration after dawn accounting for the total dew duration during the day time increased from above the canopy to under the canopy. From these results, we may conclude that dew availability as a supplemental water resource for improving the microhabitats in water-limited arid ecosystems is position dependent especially for the plant microhabitats at different stands layers.