Aquatic vegetation restoration and ecological preservation method for aquaculture slash/target water areas

A technology for aquatic vegetation and aquatic plants, applied in botany equipment and methods, fish farming, climate change adaptation, etc., can solve the problems of poor restoration effect, aquatic plants are easily disturbed by the outside world, and difficult to survive, so as to reduce the water quality. Nutrient salts, curbing the release of endogenous pollution of sediment, quick effect

Inactive Publication Date: 2012-06-13
NANJING INST OF GEOGRAPHY & LIMNOLOGY
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Problems solved by technology

The aquatic vegetation restoration technology involved in the prior art only focuses on a single factor in the above factors, so that even after the restoration technology of the prior art is transformed, the obtained aquatic plants are easily disturbed by the outside world and difficult to survive, and the restoration effect is poor.

Method used

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  • Aquatic vegetation restoration and ecological preservation method for aquaculture slash/target water areas
  • Aquatic vegetation restoration and ecological preservation method for aquaculture slash/target water areas
  • Aquatic vegetation restoration and ecological preservation method for aquaculture slash/target water areas

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Embodiment 1

[0024] The specific embodiment of the present invention is described in conjunction with accompanying drawing, as figure 1 Steps shown:

[0025] ①Environmental survey of breeding sites

[0026] The environmental survey of the breeding site is conducted once in winter, spring, summer and autumn. The survey items include lake surface wind speed, wind direction, water depth, lake current, wind wave height, cycle and wavelength, transparency, nitrogen and phosphorus content of lake bottom sediments, and redox potential. Water body total phosphorus, total nitrogen, SS, ammonia nitrogen, dissolved total nitrogen, dissolved total phosphorus, dissolved oxygen, COD MN Content, etc., as well as the species, quantity and biomass of aquatic plants, benthic animals and phytoplankton, the survey method adopts the method in the lake eutrophication survey specification.

[0027] ②Analysis of limiting factors of vegetation restoration

[0028] Mainly adopt the main factor analysis method of...

Embodiment 2

[0041] According to the step of this embodiment 1 and relevant design requirements, select to implement in the open-water area of ​​East Taihu Lake aquaculture site,

[0042] The size of each fence area is 437×263m, about 0.115km 2 .

[0043] The outer net of the net fence is a fishing net with a mesh hole no larger than 2 cm, the net height is 2.6 meters, and the bottom of the net is fixed by a gabion; the inner net is a fishing net with a mesh hole no larger than 2 cm, that is, the mesh size of the inner and outer nets can be the same or different . The height of the net is 2 meters. After installation, the seine net floats on the water surface and automatically rises and falls with the change of water level. Each fence area has a door to allow boats to enter and exit for sampling. The area in the external network is divided into multiple small areas by the internal network. The distance between the internal networks is about ten meters. In order to reduce the increase o...

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Abstract

The invention belongs to the technical filed of ecological restoration, relates to an aquatic vegetation restoration and ecological preservation method for aquaculture slash / target water areas, and comprises the steps of constructing wind reduction and wave attenuation facilities in aquaculture slash areas by means of original mesh enclosures of the aquaculture slash, transforming basement of the aquaculture slash, removing herbivorous fish in the aquaculture slash, creating habitat conditions suitable for submerged plants through culture of pioneer aquatic plants and regulation of biomass, preserving the submerged plants, promoting incensement of coverage of the submerged plants and improving water quality of lakes. Restoration of the submerged plants in the aquaculture slash in open water regions is achieved by means of wind speed reduction on lake surfaces, wave attenuation, basement transforming, herbivorous fish removal, the culture of the pioneer aquatic plants, the regulation of the biomass and creation of the habitat conditions suitable for growing of the submerged plants in the aquaculture slash of the lakes.

Description

technical field [0001] The invention belongs to the technical field of ecological restoration, and relates to a method for restoring and ecological conservation of aquatic vegetation in breeding sites / target waters. Background technique [0002] In recent years, with the rapid development of crab (fish) enclosures in lake nets, the water environment in the breeding area and adjacent areas has deteriorated. In addition, a large number of submerged plants have been salvaged to meet the needs of crabs in the breeding area for aquatic plants, resulting in serious degradation of lake aquatic vegetation. . Especially after the removal of the original net fence, the hydrodynamic conditions of the original breeding area have changed significantly after the removal of the net fence, and the breeding site lacks the distribution of submerged plants, which is not conducive to the restoration of the lake ecosystem. In order to improve the self-purification ability of the water body in t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A01G1/00A01K61/00
CPCY02A40/81
Inventor 胡维平朱金格邓建才胡柳明
Owner NANJING INST OF GEOGRAPHY & LIMNOLOGY
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