Winter temperature is relatively low, fish activity is relatively low, metabolism is relatively slow, eating materials begin to decrease or stop eating, all aspects of demand will decline, so it will lead to farmers in the winter during the breeding management negligence, in fact, the more in the winter pond management is more important. How to do overwintering management for winter fish pond farming?
First, prepare before wintering management
1. Before wintering, feed more feed rich in protein and fat to improve the fullness of fish fingerlings so that they can overwinter smoothly.
2, the wintering pond should choose to avoid the wind and the sun, the water source is sufficient, the bottom of the pond is flat, less silt, the water retention is good, the inlet and drainage is convenient, and it is convenient to manage.
3. Dredging the pond, exposing the bottom of the pond, removing too much silt, while using povidone iodine whole pond sprinkling disinfection, disinfection before the fish species are released in the pond, overwintering water level is maintained at about 2 meters water depth, while fertilizing the pond, fertilizing the pond water, increasing the bait organism.
Second, the pond overwinters
1. When merging the pond, the water temperature should be selected at 8-10 degrees, and the net exercise should be carried out before the pond, and the net pulling action should be careful to avoid injury to the fish body and prevent the fish species from being infected with various body surface infectious diseases before falling into the pond.
2, fish species should choose a strong physique, no disease and no injury, swimming lively fish species, stocking density according to the species, specifications, physique and other flexible mastery. The release time should be selected at noon on a sunny day with relatively high temperatures, avoiding wind, rain and snow weather with lower temperatures, and striving to increase stocking, early feeding, and early growth in order to prolong the growth period of fish.
3. Technical management
1. Appropriately raise the water level in winter to maintain a relatively stable water temperature. Regularly regulate water quality and discharge old water appropriately. Increasing the concentration of calcium and phosphorus in the pond water is conducive to enhancing the cold resistance and stress resistance of the fish body.
2, to improve the survival rate of wintering, should be scientific feeding, wintering feed to animal protein feed, feeding feed according to the weather, water temperature and fish activity feeding situation, timely and appropriate amount of feeding.
3. Do a good job in the prevention of common diseases in winter. A common disease in winter is water mold disease, and the prevention and control method is to thoroughly disinfect the fish body before stocking, and kill pathogens and parasites on the surface of the parasitic fish body and on the gills of the fish. Secondly, careful operation should be carried out during stocking to avoid damage to the fish body. Finally, if water mold disease occurs, sprinkle the whole pool with water beauty twice, and also pay attention to common diseases such as red skin disease, melon worm disease, wheel worm disease and so on.
4. In the management process during the wintering period, corresponding measures should be taken after observing the change of water color of the fish pond and the fish eating, activity, and problems. Appropriately deepen the water level, increase the volume of fish ponds, improve the thermal insulation capacity of fish ponds, and ensure the safe overwintering of fish species.