How to raise silver carp well

Select a place with sufficient water source, clear water quality and convenient drainage and irrigation to build a pond, the area can be controlled at 10-30 mu, the water depth in the pond is more than 2m, disinfect the pond with a certain proportion of quicklime before releasing fish fry, select large size and high quality fish fry without disease, feed strictly follow the "four fixed" principle, in addition to ensuring adequate natural bait in the water, it is also necessary to feed artificial concentrate and green feed. Do a good job in daily supervision and disease prevention.

1. Pond construction

The pond of silver carp culture requires sufficient water source and convenient access to water, and the general area can be controlled at about 10-30 mu. If the pond area is more than 30 mu, in order to facilitate daily management, the pond needs to be separated into countless small pieces with a net. The water depth in the pond is controlled above 2m to ensure that silver carp can safely survive the hot summer.

Before releasing the fish fry, drain the water in the pond and expose it to the sun for a period of time. Pour an appropriate amount of water into the pond half a month before release, and sprinkle raw lime water into the pond in accordance with the proportion of 150kg/ mu for disinfection. It is also necessary to clean up the weeds around the pond to prevent insects from laying eggs in the pond to destroy the water environment.

2. Cultivation of fresh bait

After disinfecting the fish pond, the fish fry should be fertilized with base fertilizer in the first 10 days to improve the water quality. the amount of base fertilizer should be about 300-400kg/ mu, and then dung water should be sprinkled into the pond according to the proportion of 30-40kg/ mu every 2-3 days, so as to promote the reproduction and development of plankton in the water and cultivate sufficient fresh bait for silver carp.

3. Release fish fry

The best way to release fish species is in mid-to-late May, when the water temperature can be stable at more than 18 ℃. To select high-quality fish species with the same specifications and no injuries, you need to use 3% salt water to soak and disinfect the fish for about 5 minutes before release, so as to reduce the risk of disease and improve the survival rate of fish schools. The best fish species specification is 100-200g/, and the specific density should be adjusted according to the fat and thin of the water quality.

4. Feed feeding

In the process of culture, in order to promote the rapid growth of silver carp, reasonable feed feeding is very important, and feed feeding should adhere to the four principles. Silver carp has the habit of eating at night, so it is necessary to feed once at night, and feed should be given in an appropriate amount. Too much feed will cause unnecessary waste, and it will also pollute the water quality and affect the growth. Insufficient feed feeding can not meet the growth needs of silver carp and slow down their growth rate.

Fish fry are not very adapted to the environment and feed when they are first put into the pond. in order to improve the survival rate of fish species and promote their growth rate, they can be fed with some soybean milk or soybean cake milk, and the feeding can be stopped after the fish species adapt. At the beginning, fish fry mainly feed on plankton in the water, but also eat some feed crumbs. In order to ensure that there is sufficient natural bait in the water for fish fry to eat, the ponds should be fattened regularly to promote the growth and reproduction of plankton in the water.

With the continuous growth of silver carp, in addition to feeding on plankton, it is necessary to feed them some organic feed shavings in order to accelerate the growth rate of silver carp, enhance the physique of fish and promote gonadal development. Feeding an appropriate amount of refined feed such as bran and wheat bran in autumn and after silver carp production can increase the yield of silver carp and thus increase economic benefits.

5. Daily management

Keep inspecting the pond every day, observe the color of the water and the feeding and activity of silver carp, and make daily records, and deal with them in time if abnormal conditions are found. Clean up the weeds, creations and dead fish around the pond in time.

In order to prevent fish from getting sick, the feed table should be cleaned and disinfected frequently, and a certain proportion of quicklime should be regularly sprinkled into the pond for disinfection. In order to clearly understand the growth of silver carp, regular net tea inspection was conducted in the pond to observe the water quality, fertility and the situation of silver carp, so as to properly adjust the feed feeding and base fertilizer application, but pay attention to avoid harming the fish when pulling the net.