Abstract:Recovery of submerged macrophytes is one of the most important processes in lake restoration projects, while understanding requirements for the growth and anchorage of submerged macrophytes is crucial for restoration of submerged macrophytes. Here, we investigated the sedimentary requirements for the growth and anchorage of Hydrillia verticillata, a species frequently used for lake restoration by using in-situ experiments, field investigation and literatures review. The result showed that H. verticillata could survive at the range of 0.16%-38.36% of sediment organic matter content, 1.08-2.06 g/cm3 of sediment density and 19.80%-78.14% of sediment water content, and the optimal sediment organic matter content, density and water content for the growth of H. verticillata were 0.64%-21.84%, 1.09-2.06 g/cm3 and 25.32%-72.06%, respectively. It also showed that H. verticillata could safely root at the ranges of 0.29%-18.30% of sediment organic matter content, 1.16-2.06 g/cm3 of sediment density and 19.80%-72.17% of sediment water content. These results provide valuable thresholds of sediment parameters for restoration of H. verticillata in lakes and the methods used in this study for determining sediment requirements for H. verticillata can be adopted for other submerged macrophyte species.