中文摘要：

很少工作都没在中国为荒芜的灌木在茎流动上被做。这研究在亩在 Salix psammophila C. 王 et 昌· Y ·扬和 Artemisia sphaerocephala Krasch 的二灌木测量了茎流动我们沙的土地并且建立了在茎流动和华盖特征之间的一种关系，降雨数量和紧张。在试验性的时期期间，为 S 的茎流动的数量。psammophila 和 A。sphaerocephala 分别地说明了 7.6% 粗野降雨和 2.7% 。统计分析证明为二灌木在降雨和茎流动之间有重要积极线性关联；当在茎流动百分比和降雨之间的关系建议了时，那在那里存在为 S 的 3-5 公里的降雨深度阀值。为 A 的 psammophila 和 5-7 公里。sphaerocephala。断然增加，降雨深度在降雨深度阀值价值前增加的 Stemflow 百分比在阀值以后被到达了，但是出现稳定性。逐步的回归分析建议有更多的分支，更大的王冠体积和更小的分支角度倾斜的灌木趋于收集茎流动的更多的体积。而且，当它是不到 3.0 公里 h 时，增加，最大的雨紧张在 10 分钟(I-10 ) 和茎流动百分比增加的茎流动数量和百分比趋于与 I-10 快速增加(为 S 的 -1) 。psammophila 和 2.0 公里 h (为 A 的 -1) 。sphaerocephala，然后有 I-10 增加的显示出的稳定的趋势。

英文摘要：

Little work has been done on stemflow for desert shrubs in China. This study measured stemflow in two shrubs of Salix psammophila C. Wang et Chang Y. Yang and Artemisia sphaerocephala Krasch in Mu Us sandy land and established a relationship between stemflow and canopy characteristics, rainfall amount and intensity. During the experimental period, the amount of stemflow for S. psammophila and A. sphaerocephala accounted for 7.6% and 2.7% of the gross rainfall respectively. Statistical analysis showed that there was a significant positive linear correlation between rainfall and stemflow for the two shrubs; while the relationship between stemflow percentage and rainfall suggested that there existed a rainfall depth threshold of 3-5 mm for S. psammophila and 5-7 mm for A. sphaerocephala. Stemflow percentage positively increased with rainfall depth increasing before the rainfall depth threshold values had been reached but showed stability after the threshold. A stepwise regression analysis suggested that the shrubs with more branches, larger crown volume and smaller branch angle inclination tended to collect more volumes of stemflow. Moreover, stemflow amount and percentage increased with the maximum rain intensity increasing in 10 minutes （l10） and the stemflow percentage tended to increase quickly with l10 when it was less than 3.0 mm h^-1 for S. psammophila and 2.0 mm h^-1 for A. sphaerocephala, and then showed stable trend with increasing of 110.