| 胡士可，叶 茂.基于氢氧稳定同位素的柽柳水分来源分析[J].广东农业科学,2020,47(2):54-60 |
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基于氢氧稳定同位素的柽柳水分来源分析 |
| Analysis of Water Source of Tamarix spp. Basedon Hydrogen and Oxygen Stable Isotope |
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| DOI：10.16768/j.issn.1004-874X.2020.02.008 |
| 中文关键词: 稳定同位素 塔里木河下游 水分来源 土壤水分 |
| 英文关键词: stable isotope Tarim River downstream water source soil moisture |
| 基金项目:国家联合基金（U1803245） |
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| 摘要点击次数: 1600 |
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| 中文摘要: |
| 【目的】柽柳（Tamarix）是荒漠和盐碱地的优势灌木之一，研究柽柳水分利用深度可为荒漠化治
理物种选择提供科学依据。【方法】利用氢氧稳定同位素示踪法、土壤烘干法、多源线性混合模型 IsoSource 等
方法，测定塔里木河下游英苏断面柽柳生长季茎杆水与不同深度土壤 D 同位素比率 δ 值，测定不同深度土壤含
水率，计算柽柳对不同深度土壤水分的利用率。【结果】英苏断面柽柳在土壤深度 50 cm 处平均水分利用率为
39.23%，70 cm 处水分利用率为 19.56%，90 cm 处为 17.26%，110 cm 处为 15.21%，130 cm 处为 14%，150 cm 处
为 4.50%，柽柳更多地利用中层土壤水。【结论】研究区土壤含水量低且差异较大，在 0.20%~23.81% 间波动；
英苏断面柽柳多利用 50~100 cm 间的中层土壤水；英苏断面柽柳呈现出距河道距离增加，转为逐渐利用更深层
次土壤水的现象。 |
| 英文摘要: |
| 【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. |
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