三峡坝区下游河漫滩植物在淹水环境下存活率与适用性研究

Study on Survival Rate and Applicability of Floodplain Plants in the Lower Reaches of the Three Gorges Dam Area Under Flooded Environment

为研究三峡坝区下游河漫滩生态修复区植物在淹水环境下的生长适应性及工程适用性,选择种植中华蚊母、疏花水柏枝、秋华柳、野生蔷薇等4种灌木植物在三峡坝区下游同一水位河漫滩区域并观察生长情况。4种灌木植物经历了一定程度的水淹期,结果表明,4种灌木植物存活率在淹水条件下表现出差异,其植株保存率由高到低依次为秋华柳、中华蚊母、疏花水柏枝、野生蔷薇。观察4种灌木植物的形态变化、株高生长和恢复生长情况可知,秋华柳、中华蚊母、疏花水柏枝在淹水胁迫作用下表现出较好的淹水适应性。采用加权评分法评价4种灌木植物的生态修复工程适用性,其评分由高到低依次为中华蚊母、秋华柳、野生蔷薇、疏花水柏枝,确定中华蚊母可作为河漫滩生态修复工程主要种植植物。

In order to research the growth adaptability and engineering applicability plants in the floodplain ecological restoration area in the lower reaches of the Three Gorges dam area under flooded environment,four kinds of shrub plants such as distylium chinense,myricaria laxiflora,salix variegata and rosa sp were planted and observed in the floodplain area at the same water level in the lower reaches of the Three Gorges dam area.Four shrub plants experienced a certain degree of flooding period.The results show that the survival rates of the four shrub plants were different under flooding conditions,and the plant preservation rates from high to low were as follows:salix variegata,distylium chinense,myricaria laxiflora and rosa sp.The morphological changes,plant height growth and recovery growth were observed.Among them,salix variegata,distylium chinense and myricaria laxiflora showed better flooding adaptability under flooding stress.The applicability of ecological restoration engineering of 4 Shrub plants was evaluated by weighted scoring method.The scores from high to low are distylium chinense,myricaria laxiflora,rosa sp and myricaria laxiflora.It is determined that distylium chinense can be used as the main shrub plant in the floodplain ecological restoration project.