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Method for culturing high-density fresh water attached diatom

A high-density, diatom-based technology, applied in the field of phytoplankton cultivation, can solve problems such as the lack of freshwater diatom cultivation methods, achieve good application prospects, facilitate large-scale cultivation, and have strong operability

Inactive Publication Date: 2015-05-27
FISHERY MACHINERY & INSTR RES INST CHINESE ACADEMY OF FISHERY SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The technical problem to be solved by the present invention is to provide a method for cultivating high-density diatom phytoplankton, which solves the relatively lacking defects in freshwater diatom cultivation methods; it can be zooplankton or some fish, shrimp, Crabs and mussels provide high-quality food, and also provide methods for ecological theoretical research on the formation of freshwater diatom dominance, and the cultivation of freshwater high-density attached diatoms has many aspects such as environmental protection and the development of new energy.

Method used

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  • Method for culturing high-density fresh water attached diatom

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Embodiment 1

[0019] In November when the temperature is low, tap water is obtained and placed in a glass tank of 60cm×35cm×45cm, and commercially available crude protein is added to the feed rot liquid of 30% freshwater fish floating compound feed. The total nitrogen concentration is about 140mg / L. The compound feed has been decomposed and fermented for nearly 5 months. Since soybean meal, fish meal, fish oil, minerals, vitamins, etc. are added to the commercially available compound feed, it contains various components such as protein, vitamins, minerals, and carbohydrates. Fermentation The water color of the final feed rot liquid is dark brown, and basically no odor is emitted, and the particulate matter in the feed rot liquid is filtered with a 300-mesh screen before adding. After adding feed rotting liquid, the instantaneous concentration of total nitrogen in the water body in the glass tank was 8.2mg / L, and the volume of the water body in the glass tank was about 65L. At the same time...

Embodiment 2

[0023] In December when the temperature is low, tap water is obtained and placed in a glass tank of 60cm×35cm×45cm, and commercially available crude protein is added to the feed rot liquid of 30% freshwater fish floating compound feed. The total nitrogen concentration is about 140mg / L. The compound feed has been decomposed and fermented for nearly 6 months. Since soybean meal, fish meal, fish oil, minerals, vitamins, etc. are added to the commercially available compound feed, it contains various components such as protein, vitamins, minerals, and carbohydrates. Fermentation The water color of the final feed rot liquid is dark brown, and basically no odor is emitted, and the particulate matter in the feed rot liquid is filtered with a 300-mesh screen before adding. After adding feed rotting liquid, the instantaneous total nitrogen concentration of the water in the glass tank was 10.5mg / L, and the volume of the water in the glass tank was about 65L. At the same time, the water ...

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Abstract

The invention relates to a phytoplankton culture method, belonging to the field of fresh water plant culture. The method for culturing high-density fresh water attached diatom is characterized by comprising the following steps: preparation of feed rotten liquid: by using a common fresh water fish compound feed, adding 3-5 times by volume of tap water, and carrying out rotting fermentation until the odor becomes weak; adding tap water and the feed rotten liquid into a glass container, wherein larger particles are filtered out before adding the feed rotten liquid; putting the glass container in a glass greenhouse or in an outdoor place under solar radiation (keeping out rain in rainy days), and ensuring the lighting condition to be solar radiation intensity of winter and spring; and heating the water body in the glass container to keep the temperature of the water body at 20-30 DEG C while aerating the water body for 10-14 days, wherein red brown spots, which are diatom, can grow on the wall of the glass container.

Description

technical field [0001] The invention relates to a method for cultivating phytoplankton, in particular to a method for cultivating high-density freshwater attached diatoms. Background technique [0002] Freshwater diatoms are nutrient-rich food for aquatic animals, such as fish, shrimp, crab, mussels, especially their larvae. At home and abroad, there are many reports on diatom classification, physiological and ecological aspects, and there are many reports on the mass cultivation of seawater diatoms, but there are few studies on the cultivation of freshwater diatoms. This may be related to the abundance of diatom species and biomass in seawater, while the relatively small amount of diatom biomass in freshwater. Moreover, with the general eutrophication of fresh water bodies, cyanobacteria blooms often appear in fresh water bodies, and the proportion of diatoms is very small. And because a main feature of diatoms is that diatom cells are covered with siliceous (mainly silic...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C12N1/12C12R1/89
CPCC12N1/12
Inventor 王小冬陈军徐皓刘兴国吴宗凡顾兆俊程果锋朱浩
Owner FISHERY MACHINERY & INSTR RES INST CHINESE ACADEMY OF FISHERY SCI
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