Rainbow trout culture technology rainbow trout culture conditions

The meat taste of rainbow trout is very delicious, and rich in nutrition, with less thorns and more meat, which is deeply loved by many mothers, so many fish farmers will also choose this good species to raise. Rainbow trout is easy to breed artificially. And it is known as one of the four excellent freshwater farming species. How do you raise this high-grade fish?

Culture techniques of rainbow trout

1. Rainbow trout have a long spindle shape, round snout, small and round scales, bluish or dark gray back and head, and silver-white lower abdomen. There are scattered small black spots on the side, back and fin, and the middle of the sexually mature individual has a purplish red band similar to a rainbow (hence called rainbow trout) extending to the base of the caudal fin along the lateral line.

2. Rainbow trout is a cold water fish, which is required to grow in running water with clear water quality, gravel bottom and sufficient oxygen. The living water temperature is 5 ℃, the suitable water temperature is 7 ℃, and the most suitable growth water temperature is 13 ℃. In the range of suitable water temperature, rainbow trout eats vigorously, grows rapidly, and the body can maintain a good metabolic state.

3. When the water temperature of the living environment is lower than 7 ℃ or higher than 20 ℃, the rainbow trout stops feeding, and the body fails and even dies. In natural waters, if there is plenty of water and dissolved oxygen, it can tolerate a water temperature of more than 24 ℃, but under the condition of a farm, the water temperature is at risk of death at about 22 ℃.

Culture conditions of rainbow trout

1. Temperature. This is an important condition, the best water temperature in the four seasons is 12-18 ℃, and the highest water temperature in summer can not exceed 24 ℃. Dissolved oxygen. The dissolved oxygen in water should be above 7mg/L, and the lowest should not be less than 5 mg/L. The flow of water. It is required to have a large flow, large flow, large scale of culture and high yield. Generally speaking, the flow rate of 1 liter of water per second has a production capacity of 100-200 kg.

2. The water quality is required to be clean, pollution-free and sediment-free. The shape of the fish pond. The fish ponds for rainbow trout farming vary in shape, but most of them are rectangular. Generally, the ratio of length to width is 8, 1, 1, 10, and the appropriate ratio can be determined according to the terrain. Maintain a certain slope from the water inlet to the water outlet (1 > 50 / 100 / 100), which is convenient for water exchange and sewage discharge. The arrangement of water drop can be arranged by using the terrain between the pools.

3. Fish pond construction. The structure of the fish pond is a brick-concrete structure, and the inner wall is smooth with cement. The inlet and outlet is located in the upper middle of the fish pond in order to maintain the water level. At the same time, fences should be set up at the inlet and outlet to prevent escaping fish.

The prospect of rainbow trout culture

1. Rainbow trout is a kind of fish with high protein, high fat and extremely low cholesterol. Because of its good quality and high nutritional value, rainbow trout helps to strengthen the brain, prevent cardiovascular diseases and other diseases, and can effectively resist chronic diseases such as diabetes and some types of cancer. and has high edible value and health care value. At present, rainbow trout has become the mainstream aquatic food for people in Europe, America and other countries, and has been rated as "the best brain food recommended to the people of the whole country" by the China Nutrition Association.

2. The global annual demand for rainbow trout is about 5 million tons, and the annual output is about 1 million tons. At present, the annual demand for rainbow trout in China is about 130000 tons, while the annual output is about 10,000 tons. With the rapid development of the national economy and the continuous improvement of people's living standards, the annual demand for cold-water fish is expected to increase at a rate of 35% to 40%. At present, there is a large gap between supply and demand, which mainly depends on imports. Therefore, from the perspective of international and domestic market demand, the development space of rainbow trout is still very large, and the market prospect is very promising.

How rainbow trout culture can grow faster

1. The best way to make it grow fast is to create an environment suitable for rainbow trout. The rainbow trout likes to live in clear waters with low water temperature, high dissolved oxygen and abundant flow. the limit temperature of life of rainbow trout is 0-30 ℃, the suitable living temperature is 12-18 ℃, and the optimum growth temperature is 16-18 ℃. When it is lower than 7 ℃ or higher than 20 ℃, the appetite decreases, the growth slows down, and the feeding stops when it exceeds 24 ℃.

2. Then gradually weakened and died. It has a high demand for dissolved oxygen in water. The lethal point was less than 3 mg / L of dissolved oxygen, and the "floating head" began to die when the dissolved oxygen was less than 4.3 mg / L. When the dissolved oxygen is less than 5 mg / L, the respiratory rate increases.

Rainbow trout still have such high requirements for water. At the same time, what we need to focus on in the process of rainbow trout farming, the healthy growth of rainbow trout is very important for breeding red trout, and it will also bring considerable economic benefits.