Cultivation of Summer Flowers of Freshwater White Pomfret

Fresh water Pomfret water raised for more than 20 days, the body length of about 3 centimeters, called summer flower fish species. The key cultivation techniques at this stage are as follows:

First, the choice of the pond. The pond is rich in water source, good water quality, no pollution, good light, convenient entry and drainage, the ratio of length to width is 3 ∶ 2, the size is 2 × 667m2 ~ 3 × 5667m2, the depth of the pond is 2m, and the bottom material is loam.

Second, the pond is cleaned up. 1. Pond repair: the gate of the pond should be firm, and the old pond should take out too much mud from the bottom and keep it 5cm ~ 10cm thick, which is conducive to the cultivation of bait organisms. two。 Pond disinfection: every 667m2 dry pond was sprinkled with quicklime 50kg ~ 60kg or 200ppm quicklime at noon on a sunny day. After 7 ~ 10 days, the seedlings were sprinkled in the whole pond, or sprinkled with 20ppm bleaching powder in the whole pool, 3 ~ 4 days later.

Third, stocking density. There are 300000 ~ 400000 spray per 667m2. Just to be safe. Test water seedlings should be released before releasing seedlings, and the transparency of water quality should be controlled at 40 cm ~ 50 cm before release to prevent giant water fleas from stabbing delicate fish fry in the pond. It is estimated that there will be fine weather in a few days, which has a considerable impact on the survival rate of seedlings. Choose 7: 00 ~ 8: 00 in the morning on a sunny day, first soak the oxygenated nylon bag in water for 30 minutes, pour the fry in the upwind of the pond, first pull the surface of the water, and then pull the corner of the bag back to make the fry enter the pond evenly in the water.

Fourth, feeding technology. After releasing the fry for 3 ~ 4 hours, you can start feeding. For every 100000 fry, 6 egg yolks and 250g young eel feed are fed daily. The egg yolk must be filtered through a 40-mesh screen window, usually 5 ~ 6 times a day. Bait is sprinkled evenly along the edge of the pool, requiring less and more. After 10 days, it was changed to soybean milk, and the daily feeding amount was adjusted once every 5 days. In addition, it also increases or decreases according to weather, water temperature and water quality as appropriate.

Fifth, water level control. At the beginning, the water level is 50 cm deep, and then add water 20 cm ~ 30 cm every 5 ~ 6 days, up to 1.5 meters deep.

Sixth, patrol the pond. The pond was patrolled every morning, noon and evening, and frog eggs and sundries were fished out in time to observe the degree of floating head and serve as a basis for baiting and adding water. Start the aerator at noon on a sunny day for 1 hour to 2 hours: observe whether there are signs of fish disease in the evening.

Seventh, pull the net for exercise. The fry should be cultivated for more than 20 days, and the fish fry should be trained for 2 ~ 3 times before coming out of the pool. Choose the sunny day from 9 am to 10:00, the first time to gather the net, the action should be light, fast and short, and the next 2 ~ 3 times should be appropriately extended, and the procedure is based on the undead fish. Its purpose is to strengthen the physique of fish.

8. Prevention and control of fish diseases. Give priority to prevention, early treatment of disease as the principle. Cucumber disease: 0.1ppm~0.2ppm mercurous nitrate can be used to sprinkle the whole pool, 0.13ppm~0.15ppm is suitable, or formalin 25ppm~30ppm can be used to sprinkle the whole pool, once a day, twice in a row. It is forbidden to treat the disease with copper sulfate. Rotifer disease: sprinkled with 0.7ppm ferrous sulfate mixture in the whole pool, once a day for 2 consecutive times. Ascites disease: 1ppm bleach (effective chlorine content more than 25%) was sprinkled in the whole pool, combined with medicine, and fed with 0.3% oxytetracycline bait for 5 ~ 6 days. In addition, enemy organisms are water centipedes, dragonfly larvae, every 667 square meters of water with 0.5 kg of diesel oil, the whole pool sprinkled to drive out, the effect is good.