| 【Objective】Tamarix is one of the dominant shrubs in desert and saline land. The study on the water use
depth of Tamarix can provide scientific basis for the species selection of desertification control.【Method】By using the
Tracing Method of Hydrogen and Oxygen Stable Isotope, Soil Drying Method, Multi-source Linear Mixed Model IsoSource
and other methods, the D isotope ratioδvalue of the stem water of Tamarix and the soil at different depths in the Yingsu
section of the lower reaches of Tarim River was measured. The soil moisture content at different depths was used to calculate
the utilization rate of Tamarix to soil moisture at different depths.【Result】The average water use rates of Tamarix in
Yingsu section at soil depths of 50 cm, 70 cm, 90 cm, 110 cm, 130 cm and 150 cm were 39.23%, 19.56%, 17.26%, 15.21%,
14% and 4.50%, respectively. Tamarix used more water at intermediate soil layer.【Conclusion】The soil moisture content
in the study area is low and different, fluctuating between 0.20% and 23.81%; Tamarix spp. in the Yingsu section mostly
uses water at intermediate soil depths between 50 and 100 cm. With the increase of the distance from the river, there are
more Tamarix and they transfer to use water in deeper soil layer gradually. |
