Preliminary study on sedimentary requirements for the growth and anchorage of <i>Hydrilla verticillata</i>

恢复沉水植被是湖泊生态修复工程中的关键环节,明确沉水植物生长和锚定的环境条件是恢复沉水植被的重要前提。本研究以湖泊生态修复常用的沉水植物黑藻(Hydrilla verticillata)为例,结合文献分析、控制实验和野外调查3种方法研究了其生长和锚定的沉积物条件需求。结果表明,黑藻在沉积物有机质含量为0.16%~38.36%、密度为1.08~2.06 g/cm3、含水率为19.80%~78.14%的范围内能正常生长,在沉积物有机质含量为0.64%~21.84%、密度为1.09~2.06 g/cm3、含水率为25.32%~72.06%的范围内适宜生长;在沉积物有机质含量为0.29%~18.30%、密度为1.16~2.06 g/cm3、含水率为19.80%~72.17%的范围内,黑藻植株能够稳定定植。本研究结果可为恢复黑藻提供初步的边界条件数据,也可为其它生态修复常用沉水植物的类似研究提供方法上的借鉴。;Recovery of submerged macrophytes is one the most important processes in lake restoration projects, while understanding requirements for growth and anchorage crucial macrophytes. Here, we investigated sedimentary Hydrillia verticillata, a species frequently used by using in-situ experiments, field investigation literatures review. The result showed that H. verticillata could survive at range 0.16%-38.36% sediment organic matter content, 1.08-2.06 g/cm3 density 19.80%-78.14% water optimal content were 0.64%-21.84%, 1.09-2.06 25.32%-72.06%, respectively. It also safely root ranges 0.29%-18.30% 1.16-2.06 19.80%-72.17% content. These results provide valuable thresholds parameters lakes methods this study determining can be adopted other macrophyte species.