Ecological cultivation method and ecological cultivation system of common nostoc

Abstract

The invention provides an ecological cultivation method of common nostoc. Aquatic animals are poly-cultured in aquatic water of common nostoc, wherein the aquatic animals are filter feeding aquatic animals and / or omnivory aquatic animals. The filter feeding aquatic animals are one or more of filter feeding fishes, filter feeding shellfishes, algae-eating shrimps and algae-eating spiral shells. An ecological cultivation system used by the ecological cultivation method comprises a closed water tank, an opened cultivation pool and an opened water activation tank which are sequentially connected or cage enclosure cultivation is carried out in natural water domains. According to the method provided by the invention, the common nostoc and the aquatic animals are poly-cultured in ecological diversity and are self-organized and self-circulated. By poly-culturing the aquatic animals, the utilization ratio of the cultivation space is increased. No artificial light sources are needed to supplement light, the common nostoc is cultured in a widely-open manner outdoors without changing water, and no nutritional components are added into the aquatic water. The nutritional mode of the common nostoc is photoheterotrophic, so that air introduced by an aerating system needs not to be filtered, the blowing volume needs not to be great and no commercial CO2 gas needs to be consumed.

Description

technical field [0001] The invention relates to a cultivation of cyanobacteria, in particular to a low-cost and environment-friendly ecological cultivation method and an ecological cultivation system of Gexianmi. Background technique [0002] Gexianmi is the common name of Nostocsphaeoides Kützing in Nostoc Vauch, which belongs to Cyanophyta, Cyanophyceae, Nostocales, Nostocaceae ), is a precious freshwater nitrogen-fixing cyanobacteria. [0003] The distribution of Gexianmi in the world is extremely rare. Among the rice fields mainly distributed in mountainous areas in my country, Hefeng, Hubei has the highest yield, and it is reported that there is also a small amount of distribution in Africa and other places. Gexianmi has a long history in my country, and it is not only a nutritious traditional delicacy, but also has high medical and health care effects. However, due to inappropriate farming methods and unreasonable harvesting of wild resources of Gexianmi, the wild ha...

AI Technical Summary

Problems solved by technology

[0005] The method disclosed in the Chinese patent CN101792716B refers to using the culture wastewater of Pueraria kudzu to raise aquatic animals and plants downstream, and then recycle the culture wastewater of aquatic animals and plants to raise Pueraria japonica. Immortal rice and aquatic animals and plants are cultivated in separate ponds. The operation of the system is complex and cumbersome, and this patent does not describe in detail the specific operation method of this cultivation system

Moreover, at present, the cultivation of Ge Xianmi in China all adopts a single-species breeding model. The outdoor breeding technology of Ge Xianmi is difficult to popularize, and its implementation process is difficult.

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