Directional cultivation method of diatoms in freshwater aquaculture ponds

A cultivation method and freshwater aquaculture technology are applied in the field of directional cultivation of diatoms in freshwater aquaculture ponds, which can solve the problem that it is difficult to form dominant species in freshwater aquaculture ponds, and achieve the effects of promoting mass reproduction, improving the quality of aquaculture products, and increasing aquaculture production.

CN105543096BInactive Publication Date: 2020-02-18YANGTZE RIVER FISHERIES RES INST CHINESE ACAD OF FISHERY SCI
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
Publication Date
2020-02-18
Estimated Expiration
Not applicable · inactive patent

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Abstract

The invention discloses a directive breeding method for culturing pond diatom in fresh water. By regulating the contents of nitrogen, phosphorus, silicates and minor elements in the culture pond and considering the pH value and diatom inoculation concentration, favorable algal facies using diatom as the dominant species are directively bred in the pond, thereby promoting the mass reproduction of the pond diatom, preventing the outbreak of the high-yield culture pond blue algae, and increasing the culture yield. Besides, the method can effectively regulate the water quality, reduce the disease incidence rate and enhance the culture yield and culture product quality. The method is simple, does not need any supporting facility, and can be popularized and applied more easily.
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Description

technical field

[0001] The invention relates to the field of freshwater pond cultivation, in particular to a method for directional cultivation of diatoms in freshwater cultivation ponds. Background technique

[0002] Planktonic microalgae play a pivotal role in the material circulation and energy flow of pond culture. It is indispensable for maintaining the normal function of the pond ecosystem and stabilizing the pond environment. Excellent planktonic microalgae can promote the decomposition and transformation of nutrients in water during the process of population stability and continuous growth of biomass, reduce and eliminate various toxic substances such as ammonia nitrogen, nitrite nitrogen, and organic pollutants; and also Oxygen production through photosynthesis can increase the dissolved oxygen in aquaculture water, and promote the oxidative decomposition of aerobic organic matter rich in water.

[0003] In freshwater aquaculture, the water body (mostly brown or te...

Examples

Embodiment 1

[0022] This embodiment is carried out in a circular culture pond with an area of ​​12.56m 2 , the water depth is 1m, a total of 6 culture ponds, divided into 2 groups, respectively, the experimental group and the control group. The initial indicators of water quality in the breeding pond are shown in Table 1. The tested algae, Synedra FACHB-1131, were purchased from the Institute of Hydrobiology, Chinese Academy of Sciences. The CSI medium was selected as the basis for the test. The culture conditions were 25°C, t(light):t(dark)=12h:12h, and the light intensity was 3000lx. The algae were cultivated in the CSI medium to the logarithmic growth phase and set aside.

[0023] Table 1 Pond water quality indicators

[0024]