CATDOLL : CATDOLL: Grass carp farming technology and management

Grass carp breeding technology and management

Grass carp breeding techniques are as follows:

1. Environment and pond selection

Grass carp is the most susceptible to disease. To breed pollution-free grass carp, a special breeding base should be established and formed to a certain scale, with no pollution sources around the base. The breeding base should have sufficient water source, good water quality, unobstructed water inlet and outlet, no connection between fish ponds, convenient transportation for fish, rich feed resources, and good ecological environment conditions.

2. Fish species selection

In order to raise grass carp well, you must choose healthy and lively high-quality fish species. The parents of self-bred fish species should come from qualified nationally recognized raw material farms. The seedlings should be bred pollution-free, the quality meets relevant standards, and have excellent breed traits. If conditions permit, it is best to breed them yourself. If fish species are introduced from other places, they must pass quarantine before they can be introduced.

3. Fish disinfection

Fish species must be disinfected before being put in. You can use chlorine dioxide 20-40 mg/L every 5-10 minutes, salt 1%-3% every 5-20 minutes, 8 mg/L every 15-30 minutes, potassium permanganate 10-20 mg/L every 15-30 minutes, etc. to disinfect. The stocking ratio of fish species is 80:20, that is, grass carp accounts for 80% and supplementary fish accounts for 20%.

4. Scientific baiting

Grass carp mainly feed on aquatic plants in natural waters. In pollution-free pond farming, it is appropriate to use granular feed with scientific proportions to reduce the pollution of water quality by residual bait and fully improve the utilization rate of bait. The aquatic and land grasses fed with them should be tender, fresh and palatable. Cakes and other types of bait should be free of mold, pollution and toxicity, and should be processed by crushing, soaking, cooking and other methods to make them easy for grass carp to eat and digest. When feeding bait, we must adhere to the principles of timing, positioning, quality and quantity, and determine the reasonable feeding amount by observing the weather, water conditions and the amount of food eaten by fish.

5. Feed fishery medicine properly

Fishery drugs are substances used to prevent and treat aquatic animal and plant diseases and insect pests. If used improperly, they are very likely to remain in the fish body, causing the fish quality to be substandard, so they should be used with caution. Fishery drugs generally include fungicides, insecticides, water quality improvers, etc. At present, some traditional fishery drugs have been banned, such as chloramphenicol, furazolidone, sodium pentachlorophenol, malachite green, sulfathiazole, tylosin and other 32 fishery drugs, which cannot be used in aquaculture. Special attention should be paid when selecting fishery drugs.