MySheen

Management of overwintering in ponds of cultured freshwater Pomfret seedlings

Published: 2024-11-22 Author: mysheen
Last Updated: 2024/11/22, 1. The preparation area of the overwintering pool is 600 to 1500 square meters, and the depth of the pool is 1.5 meters. The pool water in Pukou District of Nanjing is hot spring water, which flows into the pool slightly. The inlet pipe is 10 cm and the bottom of the pool is 10 cm thick. After the dry pool is disinfected, enter the water. Each pool is equipped with two three-kilowatt aerators. two。 White Pomfret seedling

1. Wintering pond preparation

Area 600~1500 square meters, pool depth 1.5 meters, pool water Nanjing Pukou District area for hot spring water, micro-inflow pool, inlet pipe 10 cm, bottom silt thickness 10 cm. After disinfection of the dry pool, water is added. Each pool is equipped with two 3 kW aerators.

2. White pomfret seed stocking

Stop feeding water three days before stocking, so that the water temperature of the overwintering pond is close to that of the pond, and the temperature difference is within 2 degrees Celsius. In Nanjing area, fry are usually caught at the end of September and the beginning of October. After fry are bathed in methylene blue 0.2ppm for 10~15 minutes, they enter the overwintering pond for overwintering. About 180 fish are stocked per cubic meter of water.

3. feeding

After entering the pond, the white pomfret was fed with floating feed with protein content above 30%, 3~4 times a day, and the daily feeding amount was 3~4% of the fish weight.

4. daily management

During winter, the water temperature is controlled at 26~28 degrees Celsius, and the water flow is stable. Regular sampling, check fish growth and feeding conditions, and microscopic examination of pests. At the later stage of overwintering, the fish load in the pond increased, and an aerator was started, which did not stop for 24 hours except when feeding.

5. Overwintering specification control

Colossoma brachypomum has strong feeding ability and large individual growth disparity. During the overwintering period, it is advisable to adopt the feeding mode of small amount, fixed point and long time, so as to avoid the excessive disparity of white pomfret specifications and improve the utilization rate of feed. Each cubic meter of water generally can be out of the pond overwintering species about 15 kg.

 
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