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Method of restoring nutrition enriched shallow lake aquatic vegetation

A technology of aquatic vegetation and eutrophication, which is applied in chemical instruments and methods, water/sewage treatment, biological water/sewage treatment, etc., can solve the problems of manpower, material resources, unsatisfactory results, and unrealization, and achieve low investment , Restoration of biodiversity, significant effect

Inactive Publication Date: 2003-07-02
中国科学院武汉植物研究所
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Problems solved by technology

[0009] To sum up, restoring the water quality of eutrophic water bodies can be partly solved by engineering methods. The disadvantage is that it needs long-term and continuous investment of manpower, material resources and huge financial resources, and the effect is not ideal.
Restoring stable aquatic vegetation is an effective way to restore water quality in eutrophic water bodies, but is not yet possible with existing technologies

Method used

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Examples

Experimental program
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Effect test

Embodiment Construction

[0027] 1. Carry out a comprehensive investigation on the water body where the vegetation restoration will be carried out, select the area with relatively low eutrophication as the leading area for vegetation restoration, and divide this area into several basic restoration units with an area of ​​5-10 mu;

[0028] 2. Establish a plant-based biological fence along the edge of the restoration unit, using wild rice as the skeleton plant of the biological fence;

[0029] 3. In the recovery unit, sow the dormant buds of Smilax and the winter buds of Erythrina in autumn. The sowing site is selected in a shallow water area with a water depth of 0.5 to 1.50 meters, and the density is 5-15 per square meter;

[0030] 4. At the end of spring of the second year, when the dormant buds start to enter the decline period, supplement the propagules or seedlings of Erythrina fragrans, and at the same time introduce the seedlings of hornwort and P. spicaculata, so that the recovery unit will have ...

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Abstract

A method for restoring aquatic vegetation in eutrophicated shellow lake features that the hygrophyte, emergent aquatic plant and flootingleaf and floating plants are used to create a biologic fence for improving the local environment of outrophicated water, and the pilot nursing spermatophyte, following equatic and target plants are gradually introduced into the said fence to form a stable cycle of different aquatic plants in the year round.

Description

Technical field: [0001] The invention relates to environmental control by biological methods, in particular to the use of aquatic plants to control the water body environment, and more specifically to a method for restoring stable aquatic vegetation in eutrophic shallow lakes. Background technique: [0002] The eutrophication standard of water bodies is mainly determined based on the concentration of nutrients such as nitrogen and phosphorus and related physical and chemical indicators. The so-called eutrophication in the present invention refers to: the total nitrogen concentration in the water body is 0.3~1 mg / liter, the total phosphorus concentration is 0.01~0.05 mg / liter, and the biological oxygen consumption (BOD) is 5~8 mg / liter, The chemical oxygen demand (COD) is 7-10 mg / L, and the transparency is 1-0.5 meters. The shallow water lake referred to in the present invention refers to a lake with a water depth of less than 6 meters or a water area within a lake with a wa...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F1/00C02F3/32
CPCY02W10/10Y02W10/37
Inventor 李伟
Owner 中国科学院武汉植物研究所
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