论文部分内容阅读
根据近5a来对塔里木河下游阿拉干断面胡杨林(Populus euphratica Oliv.)的监测数据和不同离河距离的地下水位监测信息,结合“面”上宏观调查与“点”上典型研究,集中对100hm2长期监测样方内的4499棵胡杨树进行了详细的调查,将胡杨个体实测数据和卫星影像信息进行对比,分析了塔里木河下游胡杨枝下高对应急生态输水的响应。结果显示,塔里木河下游的胡杨具有伴河生长的特性,不同等级枝下高的胡杨都主要分布在距离河道200m的范围,且其分布都与离河道距离呈显著负相关关系;应急输水后,不同离河距离的胡杨枝下高都有不同程度的下降,河道附近100m的范围内下降幅度最大,达到了0.36m,枝下高的下降主要是由于胡杨茎部和基部萌生新枝所引起的,说明应急输水对于胡杨的自然更新产生了积极的影响。
According to the recent 5 years monitoring data of poplar euphratica Oliv. In the lower reaches of the Tarim River and groundwater level monitoring information of different distance from the river, combined with the “macro” survey on “surface ” and the " , Concentrated on 4400 Populus euphratica trees in 100hm2 long-term monitoring plots were investigated in detail, the individual measured data and satellite image information of Populus euphratica were compared, and the response of Populus euphratica under the high emergency ecological water transport in the lower reaches of Tarim River was analyzed. The results showed that the Populus euphratica in the lower reaches of the Tarim River had the characteristics of companion river growth. Populus euphratica with different grades of branches were mainly distributed in the range of 200m from the river, and the distribution was significantly negatively correlated with the distance from the river. After emergency water delivery , The height of Populus euphratica with different distance from the river decreased to some extent, and the maximum decrease reached to 0.36m in the range of 100m near the river, the high drop was mainly caused by the sprouting of new branches in the stem and base of Populus euphratica , Indicating that emergency water supply has a positive impact on the natural regeneration of Populus euphratica.