Preparation method of composite green algae and method for cultivating river crabs by using same

Abstract

The invention discloses a preparation method of composite green algae and a method for cultivating river crabs by using the same, wherein the preparation method comprises the following steps of: aerating 100 parts by weight of tap water for more than 24 hours; spraying and sterilizing the inner wall of a container with medical alcohol to remove foreign bacteria; adding 100 parts by weight of tap water subjected to aeration and chlorine removalafter medical alcohol on the inner wall of the container is volatilized completely, pouring 5 parts by weight of mixed concentrated algae seed liquid containing chlorella, physalis, haematococcus and oocystis, and then adding 0.2 part by weight of culture medium dry powder; placing the container in an outdoor sunny place, placing a sterilized aeration-head-filled air pump for fully aeration;obtaining first generation of algal fluid when the overall water body is dark green after 4-5 days with bubbles hanging on the inner wall of the container; Composite green algaecontains high astaxanthin content of chlorella, which is beneficial to improving the yield and quality of freshwater shrimps in a freshwater shrimp pond for river crab interculture,and the comprehensive benefit of culture is greatly improved.

Description

technical field [0001] The invention relates to the technical field of preparation of composite green algae, in particular to a preparation method of composite green algae and a method for using the composite green algae for river crab cultivation. Background technique [0002] River crab industry is the pillar industry of agriculture in Jiangsu Province. The benefits of river crab farming are not only related to the increase of fishery income and the prosperity of farmers. However, the level of river crab breeding technology in the province is uneven. A small number of farmers have an average output of 200kg of river crab per mu, while many farmers' output barely reaches 80kg. This is mainly related to whether we can keep the grass, adjust the water and improve the bottom in the process of crab breeding, so as to provide a good environment for the growth of river crabs. Whether the vitality of aquatic plants is vigorous or not, the quality of pond water quality and bottom ...

AI Technical Summary

Problems solved by technology

Organic fertilizers have high temperature requirements, but if the temperature is too high, it will easily overwater and fertilize, and consume a lot of oxygen in the pond, which is difficult to control

In recent years, many farmers have used chlorella to fertilize water quality, but the finished product purchased on the market is dark green in color, sticky, and has no sedimentation. The naked eye cannot distinguish whether it is good or bad, and the market price is expensive.

And a single chlorella has a single function, and the effect of fertilizer and water is far inferior to that of compound green algae