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采用参照对比、实地调查、定点观测的方法,对新疆塔里木河下游长期干旱胁迫输水后不同地下水条件下胡杨生长量、生长势、开花结实以及更新响应的生态表征进行分析。结果表明:输水后一定时段内,胡杨一级枝年轮生长量随地下水埋深增加而降低,可以明确标定输水的响应时间、响应范围和响应程度;随着输水的进行,不同地下水条件胡杨年轮生长量逐步趋近;胡杨大树枯枝比与地下水埋深相关良好,是衡量胡杨生态恢复明确、易测的指标;输水后胡杨在一定范围发生更新,但更新范围、更新方式、更新苗长势及开花结实和保持种子活力所需的地下水条件仍受输水方式、输水量和输水时间的限制。
The ecological characterization of Populus euphratica growth, growth potential, flowering and fruiting, and regeneration response under different groundwater conditions after long-term drought stress in the lower reaches of the Tarim River in the lower reaches of the Tarim River was analyzed by reference comparison, field investigation and fixed-point observation. The results showed that the growth of Populus euphratica L. first-stage annual rings decreased with the increase of groundwater depth within a certain period of water delivery, and the response time, response range and response of water delivery could be clearly calibrated. With the water conveyance, different groundwater The annual growth rate of Populus euphratica is gradually approaching. The Populus euphratica trees are well correlated with the depth of groundwater, which is a measure of the clear and easily measurable index of Populus euphratica. After popularization Populus euphratica has been renewed in a certain range, but the range of renewal Way, to update the seedling growth and seed flowering and seed vigor required to maintain the groundwater conditions are still subject to water delivery, water delivery and water delivery time constraints.