How long does it take to cultivate silver carp?

Artificial culture of silver carp generally takes about 2 years, with species cultured in the first year and adult fish in the second year. Before putting in the seedlings, the ponds should be disinfected, fertilized and fertilized, and summer flowers should be put into use from May to June, generally adopting mixed culture mode, which can save culture water and promote the growth of fish schools. Feed should adhere to the four principles to ensure sufficient plankton in the water, and do a good job in daily management. When the temperature is below 10 ℃, the fish schools should be merged into ponds for safe overwintering.

Generally, artificial culture of silver carp takes about two years, and the first year is mainly for fish breeding. by the end of the year, the size of fry released face-to-face can reach about 3-5 taels, and the average body weight can reach about 4-6 jin in the second year. If the bait is sufficient, the general specification of fish in that year can reach about 500-800g, the weight of three-year-old fish can reach about 6-8 jin, and the weight of silver carp growing in natural waters can even reach 60-80 jin.

1. Pre-release preparation

The fish pond area of silver carp culture should be controlled at about 4-8 mu and the water depth should be about 1.5-2m. The pond should be disinfected and fattened before putting in the fry. To cultivate silver carp, appropriate amount of base fertilizer should be sprinkled into the pond, and should be avoided during the peak period of rotifers.

2. Summer flowers are put in

Generally, the release time of summer flowers is from May to June, and separate culture and mixed culture can be adopted. at present, farmers mostly use 2-3 kinds of fish for mixed feeding, and different kinds of fish are mixed together, which can make full use of the culture water. it can also save feed to a certain extent and promote the growth and development of fish.

3. Feeding and management

Silver carp mainly feeds on plankton in the water, requiring the pond water to be fertile to ensure sufficient plankton in the water. The pond should be fertilized before the fish seed is put in, and green manure and cooked manure should be applied in the net pond after the summer flowers are put into the pond, and new water should be injected into the pond regularly during the breeding process to ensure that the water color is brown and green.

Feed feeding should adhere to the principles of timing, positioning, quality and quantity, so as to reduce the wasteful rate of bait.

4. Daily supervision

Observe the water color and the state of the fish in the pond every day, remove the weeds and rotten impurities in the water in time, to ensure the water quality, the feeding table should be cleaned and disinfected frequently, and the bait should be fresh and hygienic. Set up anti-escape, anti-theft and enemy prevention facilities in the pond, strengthen disease prevention daily, regularly check the growth status of fish, and reasonably adjust bait feeding.

5. merging ponds and overwintering

When the water temperature is below 10 ℃ in late autumn and early winter, the fish will stop eating. At this time, the fish in the pond should be fished out in time and concentrated in the deeper pond for overwintering. The fish should be stopped feeding the fish a week before they are fished out of the pond. It is best to choose to fish the fish out of the pond on a sunny day. Be careful when pulling the net, so as not to cause damage to the fish, causing them to be infected with water mildew when overwintering. Cause unnecessary losses.

In general, the water depth of the storage pond is better controlled at more than 2m, which requires leeward to the sun, less silt at the bottom of the pond, and after the fish are merged into the pond, it is necessary to prevent the low oxygen content in the water caused by the freezing of the water surface from affecting the growth of the fish, and to prevent waterbirds from causing damage to the fish.