Pond conditions for culturing adult rainbow trout in ponds

Adult fish culture is the cultivation of commercial fish from fish species. In general, adult fish are raised with fish that have been raised for more than one year, and some have been raised from the beginning of the year until commercial fish come out of the pond. However, no matter what kind of culture method, in order to achieve high yield and efficiency, we must release a sufficient number of fish species, usually in a year's growing period, the annual production is 3.5 to 5 times the stocking amount.

Pond conditions for culturing adult rainbow trout in ponds

The area of adult fish culture ponds is required to be between 60 square meters and 600 square meters. Both round and square ponds can be designed according to local conditions, but the depth of the pond should reach 0.8 to 1.2 meters, the water depth should be 60 to 80 centimeters, and the bottom slope of the pond should be 0.8%.

The water depth requires that the depth of the pond can be adjusted with the growth of the fish. Generally, the water depth of adult fish ponds and parent fish ponds is 60-90 cm. The height of the pool wall should exceed the depth of the water by 30 centimeters. The depth of water is often controlled by the increase or decrease of the gate of the outlet.

In the special case of too much floating mud or poor water holding capacity, the pond requires all concrete to be used as the bottom, and the specific drop of the bottom is generally required to be more than 100.

The effect of concrete wall is better and it is durable. The structure of the discharge outlet is very important and should meet the requirements of water flow, anti-escape, sewage discharge and easy replacement of the grid plate. The mesh of the grid plate should be determined according to the size of the fish body, and the installation of the grid plate can be tilted, which not only expands the water area, but also facilitates the removal of debris.

When designing a fish pond, the fish pond is generally set at the top and the adult pond at the bottom. Can be divided into vertical row, horizontal row of two forms. When the amount of water is insufficient, it is better to use vertical row. The number of ponds is calculated on the basis of 1 million eye eggs to produce 800000 fingerlings and 500000 adults, which requires 3, 000 square meters of water. The output index per unit water surface is generally calculated according to the output of 20,40kg per square meter of water surface.

Adult fish culture actually includes parent fish culture. The parent fish pond is used for rainbow trout parent fish or backup parent fish breeding. the area and shape of the parent fish pond is the same as that of the adult fish pond, and the depth, water depth and bottom slope of the pond are also the same as those of the adult fish pond, but if there are conditions in the cold season, consideration should be given to overwintering indoors, and the design area can be relatively small. For example, the area of the parent fish pond is between 50 and 200 square meters, the pond is 20 and 30 meters long and the pond is 4 feet wide. The depth of the pool is 0.8-1.2 meters, the water depth is 60-80 centimeters, and the bottom slope of the pool is 0.8%.

In the actual production, because the running water pond is very limited, the adult fish pond can also be used to cultivate fish fingers. if it is built in the greenhouse, in order to save area, the shape of the fish pond is better. In outdoor construction, if the amount of water is sufficient, considering the dead corner of the water flow, a circular pool can also be built if the conditions permit, the outlet is designed in the middle, and the slope tends to the middle point, which is conducive to the discharge of sewage.

In order to use water source efficiently, high culture density is often maintained in adult fish culture ponds. Because water supply is mainly oxygen supply, and oxygen is related to temperature, water quantity, temperature and oxygen are the three major factors that affect breeding density.

If it is the transformation of the old pond, both the flowing soil pond and the flowing cement pond which are suitable for running water can be used as adult fish culture ponds, and the cement ponds for breeding Sturgeon and other fish can also be used as rainbow trout adult fish culture ponds. The area and shape can be square and round, and the design should be adapted to local conditions. It is best to form the water level difference of each pool, and the water depth of each pool should reach 60 to 100 centimeters. There should be a certain slope from the water inlet to the drainage place at the bottom of the pool. The mode of water supply should be arranged in parallel, and if it is arranged in series, it should not exceed 3 pools in series at most to prevent water quality and water flow from being affected.

Generally, there are two water injection gates, the first one is to control the water intake, and the second is the fish fence. The drainage gate is generally designed to have the function of blocking fish, drainage and water level control. In general, a water source with a water flow of 1 liter per second can produce 50 kilograms of adult fish, and the water body in the pond must have a proper flow rate of 1.2 to 1.8 meters per minute. Fish ponds should be equipped with a sewage discharge system to ensure regular discharge and control of water quality. The discharge outlet generally has the function of drainage and sewage discharge, and the general injection and discharge outlet should increase the cross-section as much as possible. In particular, the water injection port is generally in the shape of a trumpet, and the water is fan-shaped when entering the fish pond through the intake gate, and there should be a certain drop, so that the water falls into the fish pond to obtain the effect of increasing oxygen.

Nutritional value of rainbow trout

1. Protein

Rainbow trout skin and meat are rich in protein, some of which are essential ingredients for the human body, which can play a role in beauty and bone building after human consumption.

Vitamins

Rainbow trout is rich in vitamins, especially the content of vitamin D is higher than that of other foods, and we know that vitamin D plays an important role in human bone growth, and the lack of vitamin D in the human body is prone to rickets.

3. Unsaturated fat

Rainbow trout eggs contain high unsaturated fatty acids and egg albumin, which is a kind of nutrition with high nutritional value.

4. Trace elements

Iron is the most important mineral element in rainbow trout, and iron is closely related to human hematopoiesis and plays an important role in maintaining the normal activity of human internal organs.

Efficacy and function of rainbow trout

1. Rainbow trout is sweet in taste and warm in nature, which can warm the stomach and stop diarrhea.

2. Beauty and beauty

Rainbow trout is rich in protein, egg albumen, unsaturated fatty acids and other ingredients, women insist on eating, can play a good role in beauty.

3. Protect cardio-cerebral vessels

Fish oil extracted from rainbow trout is rich in unsaturated fatty acids. Its main function is to protect cardiovascular and cerebrovascular diseases. At the same time, the content of unsaturated fatty acids in rainbow trout is much higher than other freshwater fish, so rainbow trout is more valuable.

4. Promote brain development

Rainbow trout contains phosphoprotein, which can promote brain development, especially for people who often use the brain.

When it comes to rainbow trout, I don't think you know much about it. This kind of fish is relatively rare, so its price is relatively high, so the investment cost of raising rainbow trout is much higher.