After entering the winter, due to the low temperature, the fish feed is reduced, the activity is weakened, and the growth rate is slow. Many farmers neglect the management of ponds during the wintering period, resulting in the deterioration of ponds and ponds, and then outbreaks of parasitic diseases and bacterial diseases, resulting in serious fish losses and declining production, which directly causes serious economic losses. Winter fish management directly affects the level of breeding efficiency, in order to avoid suffering from stealth and direct economic losses, how to do a good job in wintering pond management.
1. Northern Region
After entering the autumn, the northern region began to be invaded by cold air, the winter freezing time is long, the wintering period is as long as 150 days, the pond water temperature is low, the fish stop feeding, and the farmers in the northern region are accustomed to breeding overwintering fish, so ensuring the safety of fish overwintering is the most concerned issue for farmers.
1, due to the low temperature in winter, less precipitation, easy to cause the pond water level is low, the water temperature changes quickly, the water temperature difference is large, so it is necessary to appropriately increase the pond water depth, the pond water depth of more than 2 meters overwintering effect is very good.
2, do not stop the material prematurely, ensure the physical health of the wintering fish, reasonably feed the feed, and reduce the rate of fat loss. Once the food is stopped prematurely, it can lead to the loss of nutrients from the fish and increase the mortality rate.
3. Maintain the water quality fertility of the pond, ensure that the fish pond has a certain amount of phytoplankton, and maintain the transparency of water quality at 40-50 cm.
2. Southern Region
The wintering period in the southern region is from mid-November to mid-February. Winter is both the season of fish harvest and the beginning of the next breeding cycle, so it is very important to do a good job in winter pond management, and a slight impropriety will directly affect the aquaculture efficiency of the current year and the increase in production and income in the next year. So how to do a good job of wintering ponds in the southern region.
1. Raise the water level and control the organic matter of the pond. If the pond has more organic matter, it is better to use the green to improve the environment at the bottom of the pond, stabilize the water quality, degrade the pond bait and manure, degrade ammonia nitrogen, and control the production of hydrogen sulfide. If the algae phase is not good, it can be improved with algae cultivation products to cultivate algae.
2. Reasonably feed the wintering feed to enhance the physique of the fish and overwinter safely. Especially in ponds with large density, it is necessary to feed reasonably to enhance the physique of fish and ensure that fish have sufficient physical strength to survive the winter. Otherwise, the fish has poor physique, severe loss of fat, and is prone to illness after the spring.
3. Do a good job in disinfection and sterilization, and regularly use povidone iodine to prevent fish diseases.