Rainbow trout is a high value cold water edible fish, what feeds are generally used to feed rainbow

Rainbow trout is one of the main freshwater aquaculture objects in the world today. Its meat is tender and nutritious, and it has always been listed as a high-end commercial fish in the international market. It is not only suitable for high-density flowing water intensive culture in ponds, but also suitable for cage and factory farming, with relatively high yields.

The earliest rainbow trout raised in China was transplanted from North Korea, and now it has been widely cultivated in Beijing, Shanxi, Heilongjiang and other places, and the output is also very considerable. Breeding rainbow trout is very simple, feeding with their own feed to promote growth, good absorption of protein nutrients, reduce breeding costs, and increase the benefits of farmers.

1. Feed requirements.

Breeding rainbow trout requires that the feed must be fresh, nutritious and comprehensive, and can be prepared with energy feed, protein feed and added feed. When the feed is preserved, we must pay attention to moisture-proof and mildew, and once the feed is found to be deteriorating, it should be eliminated in time.

2. Feed type.

Energy feed: The energy feed of rainbow trout mainly includes rice bran, corn bran, sorghum bran, wheat bran, soil surface, starch factory scraps, grain processing plant sieve material, honey, oil, etc.

Protein feed: Feed adult fish with an optimal protein content of 40% and a fat content of 6%-12%.

Add feed: mainly fish with a variety of vitamins, minerals, bone meal, shrimp and crab shell powder, fermented blood meal, etc., some farmers in order to prevent fish diseases, will also add a small amount of antibiotics.

Rainbow trout are carnivorous fish with a ferocious temperament and often flock to the surface of the water to grab food. The fry are dominated by zooplankton, benthic animals and aquatic insects. Yearling species devour small trash fish and amphibians.

Adults mainly eat fish, but also small shrimp, benthic animals, aquatic insects, plant detritus and algae. ArtificialFeedingcan be fed pellets. Rainbow trout is a cold-water fish that prefers to inhabit waters with clear water, gravel bottom, low water temperature, abundant dissolved oxygen, and abundant flow.

Since it is a cold-water fish, the water temperature for growth is 7-20, and the optimal water temperature is 10-18. If the water temperature rises to 25, it will feel "too hot" and even "die of heat", the highest critical water temperature is 26, but when the flow is high and the oxygen is sufficient, it can live in 30 water for a short time. Although it is a cold-water fish, it can survive but not grow when the water temperature is below 7.

You can choose corn bran, rice bran, you can also choose soil surface, or wheat bran, you should add an appropriate amount of protein, you should also add minerals or bone meal, fermented blood meal, etc., you must be fed regularly and fixedly, and some vitamins should be supplemented.

Eat more foods with high vitamin content, and to carry out scientific feeding, one time can not be fed too much and pay attention to the balance of nutrition, you can feed some fish offal, wheat flour, probiotics and other foods.

Edible fish, energy feed, protein feed, seafood feed, soft pellet feed. These are all feeds that can be fed. The nutritional value is high.

It is necessary to feed the grains, prepare the corn bran, prepare the rice bran, prepare the sorghum bran, prepare the soil surface, prepare the wheat bran.

When breeding rainbow trout, we must choose the feed reasonably, rainbow trout is very sensitive to the feed, they have very strict requirements for the shape and softness of the feed, the particle size of the feed will not only affect the amount of rainbow trout eat, but also affect their taste to flow culture, rivers and lakes can be! Pond breeding under heavy rainwater mixed with easy to die. It's more troublesome!

<> rainbow trout (oncorhynchus mikiss) is a cold-water fish belonging to the salmonidae family, which is currently one of the most widely farmed fish species in the world. Because rainbow trout is most suitable for artificial intensive farming, with high yield, high efficiency, broad market and other characteristics, rainbow trout farming has developed rapidly, and the scope of breeding area and output are increasing year by year. There are farms in the town next door to my house, so I don't know if it's the same kind.

When I went to the farm, I asked the owner of the farm, saying that this kind of fish has very strict requirements for the breeding environment and water quality, and the water is a long-term flowing spring water, and the mortality rate is very high if it is not cultivated properly.

We have a rainbow trout farm here that has been open since I was a kid and until now. Business is very good, rainbow trout ** is more expensive, the meat is delicious, and it is the first choice for many people who love to eat fish. This mainly depends on whether you have breeding technology and natural conditions of the location, water flow, water quality, temperature, altitude, and whether there are pollution sources in the local area, whether the transportation is convenient and other conditions.

The water quality in the mountainous areas is good, and the best ratio of length and width is 8:1-10:1, and the appropriate ratio can be determined according to the terrain.

Maintain a certain slope (1 50--1 100) from the water inlet to the water outlet, which is convenient for water exchange and sewage discharge. Between the pools, the terrain can be used to classify the water drop arrangement layout. Bulk purchase of large four big fish, and then live water ** can be sold several times the price.

The difficulty of breeding is low, the cost is low, and the sales volume is good. The pH value in the water is best between, and the salinity is adjusted according to the different growth stages of rainbow trout, generally juveniles can adapt to 5-8% salinity, and adults can adapt to 30% salinity.

Rainbow trout culture is conditioned by the fact that the water must be freshwater selected from cold water that is not turbid, non-polluting and meets the standards for fishery use. In general, cave streams, springs, underground well water, reservoir bottom drainage, and clear, unpolluted river water can be used as water for water lifting.

The variation range of perennial water temperature is 5 20, and the water volume changes little and is basically constant.

Large-scale fish farming needs to apply for the "Water and Tidal Flat Aquaculture License" in the local county-level fishery department. To apply for the "Aquaculture License for Waters and Tidal Flats", it is necessary to meet the requirements of using waters and tidal flats that are not owned by the whole people for aquaculture production; It is not allowed to engage in aquaculture in waterways, harbors, and anchorages; The ownership of the water area is clear, and it meets the planning requirements of water and tidal flat aquaculture; The scale and density of breeding meet the requirements of regional breeding capacity; The scale and density of breeding meet the requirements of regional breeding capacity.

The conditions for rainbow trout breeding are mainly that the environment must be clean and thorough, and the rainbow trout must be placed what they like to eat, and the temperature is generally about 30 degrees Celsius in the weather conditions, and the sunshine must be sufficient to be suitable for breeding. In my opinion, only the southern region is more suitable for farming.

Generally, there must be enough water, and there must be more fertilizer, so that the fish can actually reproduce faster, and the growth will be better.

Generally, some special fry are used, and some small meats are also used, so that the fish can grow bigger.

It is generally fed with soft pellet feed, which is widely used because of its high nutrient content and low cost.

Basically, it is some special feed and grains, the grain can choose corn, corn is also particularly suitable for fish farming, in fact, the specific information content of each farm is different, they have their own proportion.

Generally, some rice bran, sorghum bran, corn bran, wheat bran, and some starch are used, and some other nutrients are also mixed.

Mainly some small fry and some meat, these foods are rich in protein and can help fish grow.

Generally, it is enough to feed it with special fish feed, or it is okay to use loach and small shrimp.

Rainbow trout can grow quickly, feed vigorously, and maintain a good metabolism at the right water temperature. When the water temperature is below 7 or above 20, the rainbow trout will stop feeding and slowly collapse and die. Rainbow trout can tolerate water temperatures above 24 in natural living waters, with sufficient water and dissolved oxygen, while in artificial farms, water temperatures around 22 are at risk of death.

The key is dissolved oxygen, water temperature, and feed. Dissolved oxygen in milligrams per liter or more, water temperature 10-18 .

The newly hatched fry absorb the egg yolk on their heads, and after 20 days, they start eating, sprinkle broad soybean milk in the upstream pool, and eat small and frequent meals. After two months, the fish bones and liver are mashed and fed with a small amount of soybean cake powder. The end of the year is the breeding period of fish, and eating more at this time will cause the fastest growth.

In the second year, the adult fish period is mainly used for commercial feed. In addition, the stocking density and inlet and outlet water should be adjusted according to the size of the fish species. Rainbow trout rearing management:

Within 20 days after hatching, juveniles rely on the nutrition of their yolk sac to maintain growth and development, and 1-50,000 fish can be stocked per square meter; After 1 month of rearing, 500-1000 birds per square meter can be stocked.

After two months of feeding, all pellets can be fed; Adults can be stocked with 15-50 fish per square meter, with 30-40% animal feed and 60-70% plant-based feed. For retirees, they raise a few fish when they have nothing to do, raise insects and change the water for the fish every morning, and suck out the waste from the fish tank at night, these light and rhythmic manual labor is not only beneficial to their physical health, but also makes them forget the loneliness and troubles after leaving their jobs. While raising fish, it is necessary to study the variation of goldfish, longan, bubbles, and tiger heads.

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It is necessary to pay attention to the water quality of breeding rainbow trout, pay attention to the water temperature, try to keep it between 14 and 18 degrees, when the temperature is too low, do not feed the rainbow trout, and change the water in time to ensure that the oxygen is sufficient, and the water level can not be higher than 22 degrees, so that the rainbow trout will die, once the dead fish are found, it is necessary to clean up and change the water in time.

This fish is a cold-water fish. Cement fish ponds should be built for this fish. This kind of pond has great benefits for the growth of fish.

Artificial insemination is used for breeding.

The water source must be wide, the breeding pond must be large, the water temperature must be suitable, the oxygen injection should be timely and sterilized, the frequent sterilization and disinfection, the feeding of some favorite fertilizers, and the scientific management should be done.

To choose the right temperature, the water temperature should be 12 18, pay attention to the clarity of the water, the water should be pollution-free, no sediment.

The water quality in the mountainous area is good, and it is best to raise ** fish, and the four big fish are purchased in batches, and then the live water ** can be sold for several times the price. The difficulty of breeding is low, the cost is low, and the sales volume is good. Rainbow trout is easy to raise, and there are many rainbow trout in the tourist area of Huairou District, Beijing, and it has become a local specialty delicacy.

Rainbow trout is a freshwater fish, this kind of meat is delicious, tender and lively, no spines, suitable for the old and young. Rainbow trout are also highly nutritious. Rich in protein, vitamins, unsaturated fats, trace elements.

This fish also has high requirements for the living environment, and must live in clear and transparent fresh water with low water temperatures.

In fact, in recent years, after artificial breeding in China, it is very common on the table. The meat of rainbow trout is tender and nutritious, and there are few bones after cooking, and of course there is a lot of fish meat, which is suitable for the whole family, and there are many ways to make it delicious. Rainbow trout tastes delicious, so what about its nutrition?

In fact, rainbow trout usually swim very fast in the water, and the muscles of the fish are quite developed, so it is rich in protein, fat, vitamin A, vitamin D, amino acids, and unsaturated fatty acids and other nutrients.

Method: Put the scaled rainbow trout into the cage drawer and steam it for 3 to 5 minutes, then take it out, put it on a plate and set aside, pour the soy sauce fish juice and Maggi fresh soy sauce into the juice and pour it on the fish, put the green onion and ginger shreds and red and green pepper shreds, splash and fry them with hot oil, and garnish the coriander before eating. Method:

Remove the bones of the rainbow trout, chop the meat to make fish gelatin, add minced green onion and ginger, and set aside the fish sauce and egg whites. American ginseng and wolfberry are well mixed with soup, squeezed into the fish meatballs, add shuifa shiitake mushrooms, cabbage sum, salt, monosodium glutamate, chicken juice, and can be eaten after the fish balls are cooked.

It has the effect of warming the stomach and neutralizing and stopping diarrhea, but it is best not to eat rainbow trout if you suffer from sores and scabies! Rainbow trout is not only delicate in flesh, but also fresh in taste, the most commendable thing is that it also contains essential amino acids and trace elements for the human body, which can be called "ginseng in water" is of great significance for the prevention of cardiovascular and cerebrovascular diseases, especially suitable for the three high people to eat.

1.Fish ponds are generally rectangular in shape. From the water inlet to the water outlet, a certain slope is maintained to facilitate the exchange of water bodies and sewage discharge.

The structure is generally a brick arch structure, and the inner wall is smoothed with cement. Fences should be set up at the inlet and outlet to prevent fish from escaping. 2.

The temperature of the pool is best at 12-18 degrees, and the maximum water temperature in summer should not exceed 24 degrees. Dissolved oxygen in water is more than 7 mg per liter. It is required to have a large water flow, and the water quality should be clean, pollution-free and sediment-free.

3.The feed of rainbow trout should be nutritionally complete, with a high fat content and minerals and vitamins, and the protein content should be 40 to 45%. It is important that the bait is fresh.