Method for preventing and controlling pest alga outbreak through nannochloropsis

A technology of Nannochloropsis algae cream and Nannochloropsis, which is applied in the field of algae prevention and control, can solve the problems of loss of diversity in coastal marine ecosystems, poisoning and death of individual breeding objects, and aggravation of the ecological environment, so as to reduce the cost of breeding Cost and risk of breeding, elimination of drug residues, and effects of reducing environmental pollution

Inactive Publication Date: 2014-10-29
DALIAN OCEAN UNIV +1
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  • Abstract
  • Description
  • Claims
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Problems solved by technology

At present, the only method used in production is to use a large amount of chemical herbicides and algicides to control Ridonia and red tide algae, but the chemicals used have a negative impact on the breeding objects (stichopus, jellyfish), pond water environment and the ecological environment of the surrounding sea area. It has caused extremely serious impacts; excessive dosage will lead to the poisoning and death of individual breeding objects, and when the dosage is small, the drug will also accumulate and remain in the body of the breeding objects, and the herbicides will aggravate the deterioration of the ecological environment after being discharged into the surrounding sea areas. Resulting in a loss of diversity in nearshore marine ecosystems

Method used

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Embodiment Construction

[0017] 1. Cultivation and harvesting of Nannochloropsis: Inoculate and cultivate Nannochloropsis in f / 2 culture medium at a temperature of 24-26 °C, a salinity of 28-32‰, and a light of 5000-8000 lx. When the density of Nannochloropsis reaches 20-30 million cells / ml, the Nannochloropsis is separated from the culture medium by means of a tubular separator, and concentrated to a density of 25-30 billion cells / g. , the algae cream should be stored at 0-4 ℃, and must be used within 1 week and inoculated in field ponds.

[0018] 2. Inoculation of Nannochloropsis in seawater ponds: Usually, Nannochloropsis can be inoculated in early spring after the ice in seawater ponds melts. Before inoculation, it is necessary to sprinkle zeolite powder (160-200 mesh) in the whole pond, the dosage is 10-15 kg / mu, and sprinkle calcium dihydrogen phosphate (or dicalcium hydrogen phosphate) in the whole pond the next day, the dosage is 8-10 g / m 3 , Sprinkle ferric chloride in the whole pool on th...

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Abstract

The invention discloses a method for preventing and controlling a pest alga outbreak through nannochloropsis. The method includes the following steps: (1) cultivating and harvesting the nannochloropsis, (2) planting the nannochloropsis in a seawater pond, and (3) carrying out daily management. Compared with the prior art, the method has the advantages of being easy and convenient to use, environmentally friendly, low in cost, convenient to manage and free of toxic and side effects.

Description

technical field [0001] The invention relates to a method for preventing and controlling algae, in particular to a method for using Nannochloropsis to prevent and control the outbreak of harmful algae in seawater aquaculture ponds. Background technique [0002] With the development of seawater pond aquaculture industry, the sea cucumber and jellyfish pond culture mode with high feed and seedling quantity has developed rapidly in China, but due to the defects of this culture mode itself, it has brought many negative effects, such as breeding The excessive load of organic matter in the pond and the unbalanced ratio of nutrients have caused the outbreak of many harmful algae (Redtide algae and red tide algae), which in turn have caused serious problems such as deterioration of water quality in aquaculture ponds and flooding of diseases. And in mariculture ponds of different scales (30-100 mu) and types (harbor circles, cofferdams, earthen ponds), outbreaks of rigidia and red tid...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A01G33/00A01M99/00
CPCY02A40/80
Inventor 殷旭旺刘钢曹善茂赵文陈晓霞
Owner DALIAN OCEAN UNIV
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