Method for controlling eutrophic water body by selecting grass type lake native aquatic plant

Abstract

The invention provides a method for controlling an eutrophic water body by selecting a grass type lake native aquatic plant. In the method, superior aquatic plant species in a current season in a target lake are selected and previously cultured, and the following steps are executed: 1, filling the substrate sludge and lake water of the target lake into a container in a semi-closed greenhouse to construct an aquatic plant and natural alga co-culture system; 2, adding a nutrient solution to the co-culture system, then selecting uniformly grown plants from each species of previously cultured aquatic plants, and respectively planting into the co-culture system to ensure that each specie of aquatic plants constructs an aquatic plant community; 3, sampling and detecting the co-culture system with the aquatic plant communities planted according to a preset time interval, and selecting proper native aquatic plants used for controlling the eutrophic water body according to a detection result and a predetermined target.

Description

technical field [0001] The invention belongs to the field of water ecological control of eutrophication in the field of environmental protection, and in particular relates to a method for selecting native aquatic plants of grass-type lakes to control eutrophication of water bodies. Background technique [0002] A lake refers to a water body with a wide water area and relatively slow water exchange formed by accumulated water in a depression on land. Lake eutrophication refers to the large amount of nutrients such as nitrogen and phosphorus entering the lake water body in a relatively short period of time, which exceeds the self-purification and self-regulation capabilities of the lake ecosystem, resulting in the proliferation of phytoplankton, the degeneration and disappearance of aquatic plants, and the deterioration of the water ecosystem. The phenomenon or process of ecological system catastrophe caused by the destruction of structure and function, which leads to the dete...

AI Technical Summary

Problems solved by technology

Among the many non-point source pollution, surface runoff pollution caused by rainfall has become the most important source of nutrient salts. Animal feces and bait residues enter the lake, which intensifies the eutrophication of the lake

[0005] Endogenous pollution is caused by the release of nutrients from lake bottom sediments to the overlying water and the resuspension of sediments under the action of dynamics. Solar radiation) strong biochemical reactions occur in the bottom mud, and nutrients are also released quickly, causing algal blooms, water quality deterioration, water source pollution, and damage to tourist landscapes and natural resources

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