Method for constructing lake submerged plant communities

A technology of submerged plants and construction methods, applied in the field of construction of submerged plant communities in lakes, can solve problems such as overgrowth, occupying the growth space of other aquatic plants, and the distribution of no aquatic plants in waters, achieving quick results, improving water transparency, Easy to operate effect

Inactive Publication Date: 2015-01-28
NANJING INST OF GEOGRAPHY & LIMNOLOGY
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  • Application Information

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Problems solved by technology

Due to the difficulty of natural recovery, a large number of aquatic plants need to be artificially introduced. On the other hand, due to the serious organic pollution of the sediment and the rich nutrient content of the sediment, once the aquatic plants are restored, overgrowth may occur, especially some sediments that are prone to form dominant species. Aquatic plants, such as Elodea, Smilax, etc., will occupy the growth space of other aquatic plants during their growth period, so that in summer and autumn, there will be no aquatic plants in the water area.

Method used

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  • Method for constructing lake submerged plant communities
  • Method for constructing lake submerged plant communities
  • Method for constructing lake submerged plant communities

Examples

Experimental program
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Embodiment 1

[0033] (1) Selection of submerged plant species

[0034] According to the environmental conditions of Meiliang Bay of Taihu Lake and the characteristics of the flora of Taihu Lake, we choose Malaiyanzi, bitter grass, microtoothed eyeweed, foxtail algae, hornwort, and weed.

[0035] (2) Planting technology

[0036] According to the environmental characteristics of the Meiliangwan Restoration Area, the main techniques adopted are: seed and vegetative propagation methods, such as the seeds and tubers of bitter grass, spores of Paleia chinensis, etc.; cutting method; Figure 1-3 hint).

[0037] 1) Seed and vegetative propagation method

[0038] Seeds and propagules of submerged plants are propagated by sowing. In waters with a certain amount of silt, bottom mud thickness > 15cm, and low wind and waves, the vegetation can be restored by directly spreading seeds or vegetative bodies (spores, tubers and roots) of higher aquatic plants. Bittergrass and weed are mainly planted in t...

Embodiment 2

[0051] This embodiment provides a method for constructing a lake submerged plant community, including the following main steps:

[0052] (1) According to the environmental characteristics and flora characteristics of the area to be restored, the indigenous species of submerged plants are selected for introduction; the indigenous species of submerged plants are selected from the group consisting of Elodea, Muscarina, Hydriaphyllum, and Erythrophyllum , micro-dentate eye vegetables, chrysanthemums, foxtail algae and hornwort, preferably Malai eye-vegetables, bitter grass, micro-dentate eye-vegetables, pantheria, foxtail algae, and hornworts.

[0053] (2) Create habitat conditions that are conducive to the development of submerged plants, adopt seeds, vegetative propagation methods, cutting methods or heavy methods to introduce submerged plants, and carry out biomass regulation;

[0054] (3) In the different growth seasons of winter, spring and summer and autumn, select submerged...

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Abstract

The invention belongs to the field of ecological restoration technology and relates to construction technology of polluted lake submerged plant communities. The aim of the invention is to provide a method for constructing lake submerged plant communities. Based on the existing related technology of lake ecological restoration, in combination with the distribution environment characteristics of aquatic plants and the floristic characteristics of the plants, submerged plant endemic species suitable for polluted water introduction are selected; a proper planting method is selected to restore the vegetation according to the stormy wave and sediment characteristics of the restoration areas; the space and time layouts of the community are designed and optimized according to the life history and proper growth water level of the plants, in order to construct the submerged plant communities, ensure that the submerged plant communities are distributed in all seasons and from the lakeside to the lake center, keep certain biomass and restore the submerged plant communities, to further provide scientific and reasonable basis for the ecological restoration of lakes.

Description

technical field [0001] The invention belongs to the technical field of ecological restoration and relates to a method for constructing lake submerged plant communities. Background technique [0002] Eutrophication of water body leads to polluting scarcity of fresh water resources, complete destruction of water ecosystem, and extinction of aquatic plants. According to the multi-stable theory of lakes, there are clear water systems (grass lakes) dominated by large aquatic higher plants and strong self-purification capabilities in lakes, and turbid water systems dominated by phytoplankton (algae lakes). To build a grass-type lake system, the environmental conditions must be improved first, and then the ecosystem must be transformed with artificial assistance to build a clear-water lake ecosystem. The restoration of submerged plants is an important link in the construction of grass-type lakes. Submerged plants have important ecological functions: changing the water flow rate a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F3/32
CPCC02F3/32
Inventor 秦伯强董百丽刘平平刘正文
Owner NANJING INST OF GEOGRAPHY & LIMNOLOGY
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