How to breed four big fish without fishy smell, and how to breed four big fish

1. Fingerling cultivation.

Fry stocking: In mid to late May, when the water temperature of the pond is stable above 18, it is a suitable time for stocking. Silver carp and black carp are stocked at a density of 3-5 birds per square meter.

Feeding management: After the fry enter the pond, they mainly filter feed on zooplankton and feed detritus.

Adult fish farming: fingerling stocking size, density, wintering fingerling size of 100-200 grams, stocking density for tails.

Silver carp is a set fish, which is subject to the time when the carp is caught out of the pond.

2. Overwintering management.

Overwintering density: The overwintering density of adults and fingerlings in the pond is generally as follows: Appropriate adjustments can be made according to the pond conditions.

Requirements for wintering fish: the fish body should be disease-free, plump and robust.

Wintering method: wintering pond should be relatively clean, good water retention, keep the water depth under the ice at about meters, and divide the specifications and ponds: before the ice is frozen, the amount of phytoplankton should be kept at 25-50mg l per hectare with 90% crystal trichlorfon kilograms per hectare.

To maintain the light transmittance of the water surface, the snow on the ice surface should be swept away in time, and the water quality and fish activities should be observed through the ice eye.

Breeding in clear water for 40-50 days (without feeding) can be, you can watch CCTV'Get Rich'Probably to raise thin fish to make a fortune.

The farmed fish has a fishy smell. The main causes of fishy odor are: microorganisms, enzymes or auto-oxidation of fresh fish due to improper handling and storage; the absorption of volatile organic compounds from the outside by fish; Substances from the fish's diet or its environment accumulate in the organism.

The formation mechanism of fishy substances in aquatic products: The composition of fishy substances in aquatic products is complex, and from the analysis of the formation mechanism, there are mainly the following aspects: catalytic decomposition of potato starch enzyme, automatic oxidative decomposition of free fatty acids, high-temperature decomposition of special precursors, and the accumulation of metabolites of algae and microorganisms with earthy smell.

Here are a few ways to get rid of the earthy smell. 1. After washing the belly of the fish, put it in cold water, and then pour a small amount of vinegar and pepper into the water, or put some bay leaves. After such treatment, the fish does not have an earthy smell.

2. You can use 25 grams of salt and 2500 grams of water to soak the live fish in the salt water, and the salt water will be soaked into the blood through the two gills, and after 1 hour, the earthy smell can disappear from the old. If it is a dead fish, soak it in salt water for 2 hours to remove the earthy smell. 3. There are two white tendons on both sides of the carp's back, which is something that creates a special fishy smell.

4. When slaughtering fish, the blood of the fish can be rinsed as much as possible, and spices such as green onions, ginger, and garlic can be added when cooking, and the earthy smell can be basically removed.

As the leading species in the aquatic market, the four major carp are stable and have high feeding efficiency.

1. Pond conditions.

The area is 5 10 acres (1 mu 667 square meters), the water depth is meters, the east and west directions, the bottom of the pond is less silt, every 3 acres are equipped with 1 kilowatt aerator, there is sufficient fresh natural water source, and the pond-to-base ratio is 5:2.

2. Stocking of fingerlings.

Reasonable stocking density and multi-species and multi-specification collocation are important measures to achieve high yield and make full use of bait. Four large fish breeding for 1 year 2 stubble, the first stubble from the Qingming began to put fish fingerlings, grass carp per mu can put 320 tails, of which 120 tails weigh 1 kg per tail, to August out of the pond can be raised to about 3 kg, the other 200 tails for each tail weight 150 grams, raised to the following year Qingming Festival can reach 30 bighead carp per stubble, each tail weighs 1 kg, each tail can reach about 3 kg when out of the pond. In addition, 700 dace with a tail weight of 50 grams are put into each mu, and 130 crucian carp with a tail weight of 150 grams can reach 350 400 grams after 1 year, 450 grams after 1 year, 10 carp with a tail weight of 10 grams, 10 snakeheads with a tail weight of 50 grams after 1 year, and 10 snakeheads with a tail weight of 50 grams, and a tail weight of up to kilograms after 1 year.

3. Bait selection.

It is necessary to choose high-grade grass carp feed to maintain good water quality, promote the rapid growth of fish, and reduce the cost of breeding. 3 May, 10 11 months can be fed according to 2 3 of the weight of the pond fish, 6 September can be fed according to the weight of the pond fish 3 4 feeding. 9 a.m. accounted for 60 65 of the day, and 4 p.m. to 4 p.m. accounted for 35 40 of the whole day.

And according to the weather, water color and fish feeding conditions, the amount of feeding is appropriately increased or decreased.

Fourth, the cultivation of large fish can be said to be the simplest, and it is really much simpler than special breeding, and it is okay to pay attention to the care of water quality. Then prevent the disease and give the medicine in time. To raise these fish, water quality is the key, and a good pond is fine.

1. The fish pond must be selected in the right place first, and it must be close to the water source near the road, and the pond near the main road has a relatively large appreciation potential, and it is convenient to breed. Digging fish ponds must choose a sunny place, there can be no shelter around, the fish pond is best to dig a rectangle, and the bottom of the pond must be flat and neat, can not be high in the east and low in the west, which will affect the overall aquaculture.

2. The construction of the fish pond must do a good job in the inlet and outlet, especially the construction of the outlet, which must be strong and convenient to avoid water leakage, and the electric basis cavity is also a very important aspect, and there must be no hidden dangers. The cultivation of adult fish involves the preparation before the seedlings and the daily management of the shirts after the seedlings, and the middle is a very cumbersome and complicated breeding process, which will not be introduced here.

3. The last one is the sales problem, at the end of each year is the most critical time for farmers, whether the fish are good or not, whether you can make money depends on the pond fish, overall, as long as the best is good, the output can make money on the base.