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Large algae bloom prevention and control method based on reduction in overwintering germplasm bank of green tide algae

A technology of macroalgae and green tide algae, applied in chemical instruments and methods, polluted waterway/lake/pond/river treatment, water/sludge/sewage treatment, etc. Sea area pollution and other issues, to achieve the effect of low implementation cost, simple and convenient operation, and reduced usage

Inactive Publication Date: 2020-07-28
DALIAN MARITIME UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

France tries to reduce nutrient input by controlling land-based sewage discharge, but the prevention and control effect is not significant because it cannot solve the stock pollution in sea areas

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] This embodiment uses sodium hypochlorite as an algicide in Dalijia sea area of ​​Dalian to implement the germplasm bank removal of green tide algae overwintering in seaweed beds as a material, and further describes the present invention in detail. The main types of green tide algae in seaweed beds in Dalijia sea area of ​​Dalian are Enteromorpha spp. and Ulva kongii.

[0023] 1. In a seaweed bed in the Dalijia sea area of ​​Dalian, a rock sample plot with a length of about 20m and a width of about 10m (during retreat) was set up. During the ebb tide in late March, 5 liters of industrial sodium hypochlorite solution (concentration 12%) was diluted in 15L seawater, prepared into an algicide solution with a concentration of 3%, put it into a knapsack watering can sprayer, controlled the distance between the nozzle and the green tide algae within 20cm, and sprayed the algicide while walking. When operating, it is located in the upwind place, which is conducive to the diffus...

Embodiment 2

[0026] This example uses chlorine dioxide as an algicide in the sea area of ​​Lushun, Dalian to clear the germplasm bank of green tide algae overwintering in seaweed beds, and further describes the present invention in detail. The main types of green tide algae in seaweed beds in Dalijia sea area of ​​Dalian are Enteromorpha spp. and Ulva kongii.

[0027] 1. Select a seaweed bed with a relatively gentle slope in the sea area of ​​Lushun, Dalian, and set up a rock reef plot with a length of about 30m and a width of about 20m (during ebb tide). Tablets (content 12%) are dissolved in 60L seawater to make an algicidal solution with a concentration of about 100-150mg / L, put it into a backpack sprayer, control the distance between the nozzle and the green tide algae within 20cm, and spray while walking Apply algicide. When operating, it is located in the upwind place, which is conducive to the diffusion of algicide and avoids splashing on the operator. For some places where there ...

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Abstract

The invention discloses a large algae bloom prevention and control method based on reduction in the overwintering germplasm bank of green tide algae. The method is mainly based on the life history characteristics of green tide algae in the Bohai sea area of China. According to the method, chlorine dioxide (with a concentration of not lower than 100 mg / L) or sodium hypochlorite (with a concentration of not lower than 2%) is used as an environment-friendly algicide during an ebb tide of an astronomical tide in a transition stage (from late February to early April) of succession from winter seaweed communities to spring seaweed communities, and applied to removal operation of green tide algae in an intertidal zone; and by reducing the overwintering germplasm bank of the green tide algae, theamplification speed of spring green tide algae communities is inhibited and the number of fallen green tide algae is reduced, so early prevention and control of large algae blooms are realized.

Description

technical field [0001] The invention relates to a method for reducing the overwintering germplasm bank of green tide algae, which can suppress the expansion speed of green tide algae population in spring, reduce the number of shedding green tide algae, and realize early prevention and control of large algae blooms. Background technique [0002] Large algal blooms, also known as green tides, refer to an ecological disaster in which excessively proliferating benthic sedentary algae break away from their attachment bases and accumulate along the coast. The emergence of large algal blooms is a response to the increasing concentration of nutrients in the marine environment. Therefore, the input of excess nutrients (especially nitrogen and phosphorus) is the root cause of frequent occurrence of green tides in estuaries, shallow waters, and inner bays. With the intensification of seawater eutrophication in coastal waters, the occurrence of large algal blooms in my country's sea wat...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F1/50C02F1/76C02F103/08
CPCC02F1/50C02F1/766C02F2103/007C02F2103/08
Inventor 巩宁邵魁双顾炎斌刘玉安柳圭泽叶金清
Owner DALIAN MARITIME UNIVERSITY
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