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Ecological repairing method of sphagna macroalgae to eutrophic open sea area

A technology of eutrophication and ecological restoration, applied in chemical instruments and methods, seaweed cultivation, botany equipment and methods, etc.

Inactive Publication Date: 2009-11-18
SHANGHAI FISHERIES UNIV
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  • Description
  • Claims
  • Application Information

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Problems solved by technology

Therefore, to reduce the frequency of red tides and reduce the losses caused by red tides, the only thing humans can do is to effectively control the eutrophication factors in seawater.

Method used

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  • Ecological repairing method of sphagna macroalgae to eutrophic open sea area
  • Ecological repairing method of sphagna macroalgae to eutrophic open sea area
  • Ecological repairing method of sphagna macroalgae to eutrophic open sea area

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Embodiment Construction

[0023] The implementation process of the method for ecological restoration of Enteromorpha large seaweed in the eutrophic sea area of ​​the present invention is as follows:

[0024] (1) Selection of the cultivation sea area. The eutrophication sea area for cultivation should be selected under the premise of ensuring the safety of the breeding raft. In winter and spring, choose the sea area with northwest wind and northeast wind, and the bottom quality should be sandy or hard mud. , The seawater is preferably clear or semi-turbid, the tide is smooth, the flow rate is 10-30 cm / s, and the tide level is the tidal area between 2.5 hours and 4.5 hours of dry dew during high tide. The implementation site of the present invention is Hangzhou Bay Jinshan Urban Beach Sea Area;

[0025] (2) Cultivation facilities use semi-floating rafts, and the semi-floating raft breeding area is selected in the intertidal zone, that is, the entire raft can be floated on the water at high tide, and the raft...

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Abstract

The invention relates to an ecological repairing method of sphagna macroalgae to an eutrophic open sea area, which is mainly characterized by comprising the following steps: selecting a cultivating area; fabricating a raft frame and a lace curtain of a cultivating facility; pulling seedlings of conchospores cultivated by a seedling net, conveying the seedling net, hanging the lace curtain and managing the dryness; managing the cultivation of ripe sphagna macroalgae in sea; picking the ripe sphagna macroalgae; and measuring nitrogen and phosphorus in texture. Sphagna can obviously reduce the danger of large-area red tide induced by excessive elements such as nitrogen, phosphorus, and the like in a neritic zone, can be used as a repair tool of water eutrophication in the neritic zone, is cultivated in the eutrophic sea area so that necessary nutrient substances can be provided and nutrient substances in sea can be transformed out of a pollution system through the harvest, therefore, the application of the ecological repairing method can achieve the purposes of inhibiting the growth of red tide microalgae, and releasing and eliminating eutrophication, and also obtains higher economical value.

Description

Technical field: [0001] The invention relates to an ecological restoration method for eutrophication, in particular to an ecological restoration method for Enteromorpha large seaweed in eutrophication sea areas. Background technique: [0002] Eutrophication has always been a serious ecological problem in coastal waters off the Yangtze River estuary, central and southern Zhejiang and other coastal waters. Areas with more serious eutrophication include coastal aquaculture areas, key sewage outlets, and ports with poor water exchanges. According to the 2007 China Marine Environmental Quality Bulletin issued by the State Oceanic Administration, the heavily polluted waters of the East China Sea are mainly concentrated in the Yangtze Estuary, Hangzhou Bay and the coast of Ningbo. The main pollutants are active phosphate, inorganic nitrogen and petroleum. The pollution sources that cause water eutrophication mainly come from terrestrial pollution sources such as industrial, agricultural...

Claims

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Application Information

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IPC IPC(8): C02F3/32A01G33/00
CPCY02A40/80Y02W10/37
Inventor 何培民徐姗楠
Owner SHANGHAI FISHERIES UNIV
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