Pollution-free food is popular how to raise pollution-free grass carp

In recent years, the concepts of pollution-free, green, organic and original ecology have been deeply rooted in the hearts of the people, and eating healthy food has become a public demand. Grass carp, as one of the four major domestic fish, accounts for a large proportion in fish culture. In order to raise grass carp well, fish farmers should pay attention to the following three points and pay attention to each link to ensure that grass carp is green food.

Grass carp culture

I. Ecological environment

For the cultivation of pollution-free grass carp, there should be a special fish culture base of a certain scale, and there are no pollution sources around the base, such as industrial wastes, agricultural wastes, pesticides, domestic sewage, and all kinds of garbage. The aquaculture base has sufficient water sources and good water quality, which meets the "Water quality Standard for pollution-free Food Freshwater Culture". The water supply and drainage are smooth, the fish ponds are not connected with each other, the transportation is convenient, the feed resources are abundant, and the ecological environment is good. The fish pond with an area of 5 mu and 10 mu is the best, with a water depth of about 2 meters in the east-west direction. Too much silt in the pond should be removed. After exposure to the fish pond in winter, 10~20cm was injected 10 days before the fish was released. The fish pond was thoroughly disinfected with 150kg quicklime per mu. After 2-4 days, the filtered water was injected into the fish pond and the sterilized manure was applied to prevent diseases and pests from flowing into the fish pond with the water.

2. Fish fingerling restocking

If you want to raise grass carp well, you must choose healthy, lively and high-quality grass carp fingers. before putting them, after disinfection, you can use chlorine dioxide of 20 milligrams per liter for 5 minutes, 1 percent salt for 10 minutes and 10 milligrams of potassium permanganate per liter for 5 minutes. Before the first ten days of March, grass carp were planted in ponds with good conditions, 250 fish per mu, 300 grass carps with specifications of 300 grams and 500 grams per mu, and 500 grass carps with specifications below 200 grams per fish. If the density of fish ponds is too high or there is no clean running water, an aerator should be prepared to release fish species according to the 80:20 stocking ratio, that is, 80% of grass carp are mainly cultured with 20% of fish (200 silver carp, 50 bighead carp, 80 carp, etc., with a size smaller than grass carp). In addition, a small amount of crucian carp can be equipped to make full use of water space and residual bait to improve culture efficiency.

In the regulation of water quality, the water quality of grass carp is very important, and it is necessary to keep the water quality fresh and hygienic. It is required to ensure that the pond water is fat, tender, refreshing and lively. 5-10cm new water is added every 3-5 days to increase water vitality, increase dissolved oxygen, improve the reproduction of plankton in grass carp ponds, meet the feed needs of silver carp and bighead carp, and stimulate the growth of grass carp. The aerator increases oxygen, keeps the water quality fresh and the dissolved oxygen is normal. At the same time, every half month, sprinkle 10-20 kilograms of quicklime per mu. The transparency should be kept at 25-30cm, the dissolved oxygen is 3-5 mg / L, and the pH value is 7.5-8.0.

3. Feed feeding

Give priority to green feed, the insufficient part, feed pellet feed. Feed feeding, according to the four fixed, four look principle, generally 3 times a day, 8: 9 am, 3-4 pm, evening, evening feed. The daily feeding amount should be 30 minutes for grass carp and 30-50% of grass carp body weight for 2 hours. The specific feeding amount should be increased or decreased according to the season, weather, water temperature and the feeding situation of grass carp, and 80% of grass carp should be fed.