Rainbow trout has the characteristics of delicious meat, rich nutrition, less thorn meat, high food value, rapid growth, and easy artificial reproduction.
Rainbow trout is a cold-water fish, which is named after a rainbow-red vertical pattern along its lateral line. Its living water temperature is 2 ~ 25 °C, the optimum water temperature is 12 ~ 20 °C, the higher the dissolved oxygen in water, but adaptability is strong, both in the pond culture, but also suitable for stocking in reservoirs, lakes, rivers. Especially in running water, it can be grown all year round with high yields. Generally 667 m2 (1 mu) produces 30,000 to 35,000 kilograms. Therefore, the artificial breeding of rainbow trout is very attractive. Its breeding technology is:
First, fish farm construction. Wherever the annual water temperature is maintained at 7 to 20°C, the dissolved oxygen is above 5 mg/l, the pH is between 6.5 and 8, and the water is fresh, rainbow trout farms can be built. The terrain requires a certain slope in order to facilitate the drainage and drainage. At the same time, the drop in water is also conducive to natural oxygenation. Medium-sized and small-scale breeding farms, with an area of ​​0.5 to 20,000 m2. The area of ​​each rearing pond is 200m2, and the cement structure has a length and width of 25m 4m to 30m to 60m 5m to 8m. This facilitates feeding, management and control of fish diseases, and allows uniform flow of water. Go to the pool, in line with the characteristics of rainbow trout hi reverse. There are two types of injection and drainage outlets in the fish pond: one is the inlet and outlet equivalent to the width of the fish pond, and the gate is from top to bottom, and the whole section is kept over water. This form is suitable for large-scale fish farms; The inlet width is only about 1/5 of the tank width, and the outlet width is 1/2 of the tank width. At the same time, in order to prevent the wild fish from entering the fish ponds and pool fish from escaping, fish traps should be set at the inlet and outlet. The rearing ponds are arranged in parallel pools and series pools, and they can also be combined. However, it is better to use concatenated fish ponds for convenient management and labor saving. If the fish pond is built on the mountain, the aquarium can be like a terraced field. It is stratified down one level and the water from the upper level pool flows into the next level pool through a small gate to keep the water flowing.
Second, adult fish rearing. Adult fish rearing begins with the rearing of 50 grams of fish. Stocking densities 210 to 15 per meter, water depth of 1 to 2 meters. In feeds, animal feeds account for 30% to 40%, and plant feeds account for 60% to 70%. Animal feedstuffs include fishmeal, meat powder, small trash fish, cocoon and poultry, and the internal organs of livestock. Botanical feeds include dried cake powder, bran, bran, and lettuce leaves. The particle size is palatable, usually 4 to 8 mm in diameter. Feeding twice a day, the feeding amount is 2% to 3% of the total weight of the fish, which can be flexibly controlled according to the weather, water temperature and fish appetite. Generally do not feed too much under the conditions of dense culture, so as not to pollute the water quality and kill the adult fish. In order to achieve high yields of fish, the management must first maintain enough water and sufficient dissolved oxygen. For this purpose, additional oxygen-increasing equipment should be added to the fish ponds. Once oxygen deficiency occurs, supplement them immediately. In addition, the fish that have reached the food standard are often sold in time for sale. Individuals with significant differences will be selected and kept in separate ponds.
Rainbow trout is a cold-water fish, which is named after a rainbow-red vertical pattern along its lateral line. Its living water temperature is 2 ~ 25 °C, the optimum water temperature is 12 ~ 20 °C, the higher the dissolved oxygen in water, but adaptability is strong, both in the pond culture, but also suitable for stocking in reservoirs, lakes, rivers. Especially in running water, it can be grown all year round with high yields. Generally 667 m2 (1 mu) produces 30,000 to 35,000 kilograms. Therefore, the artificial breeding of rainbow trout is very attractive. Its breeding technology is:
First, fish farm construction. Wherever the annual water temperature is maintained at 7 to 20°C, the dissolved oxygen is above 5 mg/l, the pH is between 6.5 and 8, and the water is fresh, rainbow trout farms can be built. The terrain requires a certain slope in order to facilitate the drainage and drainage. At the same time, the drop in water is also conducive to natural oxygenation. Medium-sized and small-scale breeding farms, with an area of ​​0.5 to 20,000 m2. The area of ​​each rearing pond is 200m2, and the cement structure has a length and width of 25m 4m to 30m to 60m 5m to 8m. This facilitates feeding, management and control of fish diseases, and allows uniform flow of water. Go to the pool, in line with the characteristics of rainbow trout hi reverse. There are two types of injection and drainage outlets in the fish pond: one is the inlet and outlet equivalent to the width of the fish pond, and the gate is from top to bottom, and the whole section is kept over water. This form is suitable for large-scale fish farms; The inlet width is only about 1/5 of the tank width, and the outlet width is 1/2 of the tank width. At the same time, in order to prevent the wild fish from entering the fish ponds and pool fish from escaping, fish traps should be set at the inlet and outlet. The rearing ponds are arranged in parallel pools and series pools, and they can also be combined. However, it is better to use concatenated fish ponds for convenient management and labor saving. If the fish pond is built on the mountain, the aquarium can be like a terraced field. It is stratified down one level and the water from the upper level pool flows into the next level pool through a small gate to keep the water flowing.
Second, adult fish rearing. Adult fish rearing begins with the rearing of 50 grams of fish. Stocking densities 210 to 15 per meter, water depth of 1 to 2 meters. In feeds, animal feeds account for 30% to 40%, and plant feeds account for 60% to 70%. Animal feedstuffs include fishmeal, meat powder, small trash fish, cocoon and poultry, and the internal organs of livestock. Botanical feeds include dried cake powder, bran, bran, and lettuce leaves. The particle size is palatable, usually 4 to 8 mm in diameter. Feeding twice a day, the feeding amount is 2% to 3% of the total weight of the fish, which can be flexibly controlled according to the weather, water temperature and fish appetite. Generally do not feed too much under the conditions of dense culture, so as not to pollute the water quality and kill the adult fish. In order to achieve high yields of fish, the management must first maintain enough water and sufficient dissolved oxygen. For this purpose, additional oxygen-increasing equipment should be added to the fish ponds. Once oxygen deficiency occurs, supplement them immediately. In addition, the fish that have reached the food standard are often sold in time for sale. Individuals with significant differences will be selected and kept in separate ponds.
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