In aquaculture, feed costs account for more than 60% of the cost of aquaculture. Reducing feed costs is the key to increasing the benefits of fish farming. Applying photosynthetic bacteria to produce crop straw (such as wheat straw, rice straw, corn stalks, peanut shells, etc.) to produce fish bio-feed, not only significantly raise the aquaculture efficiency, but also significantly reduce feed costs.
Photosynthetic bacteria and other EM bacteria can produce a variety of promoting factors, promoting immune factors, coenzyme Q, etc., to promote the growth and development of larvae, have the following effects in aquaculture:
1. Reduce the content of toxic and hazardous substances in the water body and eliminate the dead fish phenomenon;
2, increase the oxygen content of the water, reduce or eliminate fish floating head phenomenon;
3, reduce the aerator time, reduce water changes, save energy and labor, production costs significantly reduced;
4. To increase the survival rate of juvenile and adult shrimps particularly significantly;
5. Elimination of skin diseases caused by bacteria in fish and shrimp, making the appearance of fish and shrimp robust;
6, significantly increase the food intake of fish, quickly increase weight, and then increase production.
The use of crop stalks for the production of fish bio-feeds has higher nutrient content than corn and has comprehensive nutrition, and due to its large size and small specific gravity, the suspension time in water is as long as 1 hour, which is an ideal feed for fish and shrimp.
The specific methods for using photosynthetic bacteria to produce high-efficiency fish biological feed using crop straws are as follows:
1, the crop straw crushed;
2. Put the straw powder into the fermentation tank, add straw powder weight 80% water, 1% glucoamylase, 1% compound enzyme, 0.5% live yeast and 1% sodium chloride and 0.5% The lactic acid is fully stirred evenly;
3, access to 3% of photosynthetic bacteria, incubated at 15 °C -35 °C temperature for 2 days, the material layer covered with white hyphae odor, that is, high-efficiency fish biological feed, can be made into particles for drying and storage.
Efficient fish biological feed contains abundant amino acids and trace elements. It is rich in B-vitamins, folic acid, coenzyme Q and other anti-viral substances and biological active substances as well as various immune growth factor. After eating, fish and shrimp can enhance disease resistance and promote growth. Its nutrient composition was tested and showed that it contained 12.31% of crude protein, 4.20% of crude fat, and 19.24% of crude fiber. The contents of three main amino acids were: lysine 0.68% and methionine 0.16. %, cysteine ​​0.19%.
Feeding fish and shrimp with high-efficiency fish biofeed has the advantages of high survival rate, less disease, less water change, high yield, and low cost. The specific results are as follows:
1. The hatching rate of fertilized eggs of fish and shrimp can be increased by about 20%;
2, prevention of fish and shrimp disease, can improve the survival rate of 20% -40%;
3, the appearance of fish and shrimp is robust, meat is particularly good, and can increase production 20% -30%;
4, can reduce the time to open the aerator two-thirds, reduce production costs;
5. The conversion of crop stalks into treasure will reduce the cost of feed by about 60%.
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