Method for in-situ treatment of river and lake pollution through submerged plant intervention succession

The invention relates to a submerged plant intervention succession in-situ treatment method for river and lake pollution, which is characterized by comprising the following steps: during river and lake ecological treatment, by applying the competitive rejection characteristic between ecological niche overlapping species, firstly reducing influencing salt in a water body by using stem grass, and after the water quality of the water body reaches a certain standard, cutting down the influencing salt in the water body by using the stem grass; on the premise that the water quality is improved, the abundance of the stem grass is reduced in stages, the abundance of the basic grass variety is improved, the submerged plant community structure is improved, finally, a clear water type steady-state water ecosystem with the basic grass as the group building species and the stem grass as the associated species is formed, and the treatment of natural water is achieved. 本发明涉及的一种沉水植物干预演替原位治理河湖污染的方法，其特征在于：在河湖生态治理时，应用生态位重叠物种间具有