塔里木河下游不同断面胡杨径向生长对地下水变化的敏感性研究

Sensitivity of Radial Growth of Populus euphratica at Different Annual Ring to Groundwater Variability of the Lower Reaches of Tarim River

胡杨是生长在塔里木河流域内的一种耐旱性木本植物,营造胡杨林能有效减少风沙对水土的冲刷。胡杨在生长过程中对地下水的感知是非常明显的。通过对胡杨的生长状况调查研究,能够观察出地下水位的变化情况。文章针对塔里木河下游不同断面胡杨径向生长对地下水的敏感性进行了研究,结果表明:不同断面积的胡杨对地下水位变化感知能力是不同的,年降雨量较多时,感知能力会提升;胡杨的断面对地下水位的感知度随地下水位的下降而逐渐下降。

Populus euphraticais a drought-tolerant herbaceous plant growing in the Tarim River Basin.Populus euphratica can effectively reduce the erosion of soil and water by blown sand.Populus euphratica have very obvious perception on groundwater in the growth process.Through the investigation of the growth of Populus euphratica,changes in groundwater level can be observed.The sensitivity of the radial growth of Populus euphraticato groundwater at different annual ring of the lower reaches of the Tarim River was studied.Result shows that perception ability of Populus euphraticaat different groundwater level at different annual ring is different,and the perception ability will increase when the annual rainfall is high.Annual ring of Populus euphratica on the perception of groundwater level decreases gradually with the decrease of groundwater level.