The cultivar “Salmonfish†is cultivated from a fry which has been bred up to 2 cm in length to 5 cm in length.
1. Fish pond conditions: 5 square meters - 100 square meters cement pool can be. The pool is 80 cm to 100 cm deep. The pool is surrounded by 40 mesh nets to form a 0.5 meter high circle. The fence is inserted into the soil at 20 cm to 30 cm and tilted slightly inward to prevent the fish from escaping during rain or water changes. One week prior to the release of the seedlings, fish ponds were cleaned and disinfected, and fertilizers were used to cultivate plankton. Because the moonlight is strong and direct light and hi hi under the aquatic plants or swimming at the bottom edge of the aquatic plants, the heat season needs to be prevented from cooling down. The water plants such as water peanuts and water hyacinth should be transplanted in the pool, and a shade shelter should be erected at the corner of the pool. .
2. The fry stocking density is the same as that of stocked fry, and according to the condition of the pond and the management level, the stocking density is 500 to 1000 tails per square meter. With the growth of the fish, the size of the fish is grading and thinning in time.
3. Water temperature regulation: fry growth temperature range of 18 °C -34 °C. The optimum growth water temperature is between 24°C and 30°C. When the water temperature is low, the activity ability is weakened, the food intake is reduced, and the growth is slow. When the water temperature exceeds 35°C, the fish fry become restless and frequently surfaced. When the temperature exceeds 38°C, the mortality rate reaches 80%-90%. During the hot season, attention should be paid to putting shades and water plants and replacing river or well water with lower temperatures.
4. Feeding: The fry of 2 cm to 5 cm in body length is still mainly zooplankton. After the fish seedlings sit under the pond, on the one hand, fertilize the amount of plankton in the water regularly, and on the other hand, manually catch and collect rotifers or chironomid larvae and feed it regularly at regular intervals. When the fry body grows to about 3 centimeters in length, the body shape resembles that of adult fish. The food table can be set up in the pool, and artificial feeding can be gradually added. In the early days, low-value fish such as white quail and quail can be used to feed meat. After one week, turtles or quail feed or "fishmeal + wheat flour" is gradually added into broilers. After that, they are gradually fed with "thyroid or quail feed + wheat flour". As the fish grows, the proportion of wheat flour is gradually increased, and appropriate animal feeds such as flies, cockroaches and quail meats are fed.
5. Water quality: The water body cultivated in the month of the month is relatively small, the stocking density is relatively high, and the water quality is easily deteriorated. Even if the moons have strong resistance to hypoxia, they are required to meet the normal feeding and healthy and rapid growth of the seedlings during the seedling cultivation. Dissolved oxygen in the water is higher than 2 mg/l, the water quality is weakly acidic or neutral, the pH value is controlled at 6.4-7, and the feeding should be adequate. Frequent water changes or local flow is used to keep the water fresh, so that the water body is “fat, live, Tender and cool." The cement cultivating pool requires that the water be changed every 3 to 5 days, each time changing the water 1/3-1/2, while removing the sedimentary dirt and collecting the debris floating on the water to prevent the feces and the residual baits from corrupting. Ammonia poisoning. Use of beneficial microorganisms such as photosynthetic bacteria to improve water quality.
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