红砂群落广泛分布于我国的准格尔、塔里木、柴达木、中央戈壁及阿拉善等地。阿拉善额济纳红砂荒漠极其干旱，但红砂在这里却旺盛的生长。额济纳红砂荒漠的灰棕漠土的土壤剖面明显地分为脱盐层（上，0～30 cm）和盐化层（下，30－70 cm，含盐量达1%）。红砂的根系在脱盐层中除主根外，无侧根和细根（吸收根）；在盐化层中却有许多侧根和大量细根（吸收根）。由此推断：盐化层中的盐分（特别是吸湿性盐分）的吸湿水可能就是红砂的可利用水源。 调查测定额济纳红砂荒漠土壤剖面特征和盐化层水分及盐分含量、组成，采用稳定同位素技术验证土壤盐化层含水是红砂的利用水源；实验观测和测定根系解剖结构、根系构型特征和根系导水率，分析红砂在干旱-盐化土壤中的水分吸收，进而研究揭示旱生陆生植物红砂的水分吸收机理，为拓展植物的水分利用研究提供新启发，为挖掘开发植物抗旱、抗盐的新种质、基因资源提供科学依据。

Reaumuria soongpric is widely distributed in the different habitat of China such as Zhungeer, Talimu, Chaidamu, Centry gebi, Alashan. Reaumuria soongorica's desert have very dry and saline soil. Reaumuria soongorica is flourish in this area .There are zonal grey-brown desert soil and residual saline soil exist accompany.The desalinate layer of soil profile is from 0 to 30cm， the principle root of Reaumuria soongorica distribute in this layer;The salinzed layer of soil profile is from 30cm to 70 cm, it's salt content is more than 1%,there are more branch roots and thin roots. So we think Reaumuria soongpric could ues the water of salinzed layer of soil. Survey and measure soil profile characteristics ,water content，salt content, salt consititute of Reaumuria soongorica's desert , use Isotopic Element to test the water souce of Reaumuria soongorica; Survey and measure root anatomic structure, root system architectures and root hydraulic conductance, to analyze how Reaumuria Soongorica absorb water from soil , study the absorbing mechanism of Reaumuria Soongorica through those experiments.The study could expand the water use research on plant,it also could provide some science basis conclusions for developing new germplasm and gene source of antidrought and antisalty plant.