How to manage early autumn fish ponds with high water quality, fertilizer and oxygen consumption in autumn

In autumn, the fish grows rapidly, the fish carrying capacity in the fish pond increases, the feeding amount and fish excretion in the fish pond also increase, resulting in the fertilizer of the water quality of the fish pond in autumn, the oxygen consumption of the water body increases, and the fish is prone to floating head diseases. Therefore, it is particularly important for fish farmers to strengthen the management of fish ponds in autumn.

Fish pond

First, grasp the bait and feed it. The suitable air temperature and water temperature in autumn is not only one of the fastest growth stages of fish, but also the key period for the formation of fish yield, so it is necessary to increase the amount of bait and feed high quality bait. Fish farmers should master the "four fixed, four look" bait to ensure the rapid growth of fish. As long as the weather is normal and the fish activities are normal, it is necessary to pay close attention to bait to ensure that all kinds of fish in the fish pond are well fed, so as to gain weight and gain weight quickly. For herbivorous fish, the combination of fine and coarse should be achieved, and the amount of feed should be increased appropriately.

Second, do a good job of water quality regulation and control. According to the change of weather, adjust the amount of bait in time, less or no in cloudy and rainy days, so as to avoid excess residual bait, which not only increases the cost, but also spoils the water quality. Frequently open the aerator, so that "three open two do not open", sunny noon, not open in the evening; cloudy early morning, not open during the day; continuous rain. At the same time, attention should be paid to the change of water quality in fish ponds, and quicklime should be used to adjust the pH of the water regularly to keep the pH value at 7.5-8.5. Fish ponds to maintain a certain water level, regular water injection, such as poor water quality or inconvenient water injection, you can choose fine weather, about 15 days to use compound microbial preparation to regulate water quality, reduce the harm of ammonia nitrogen, hydrogen sulfide, nitrite and other poisonous substances to fish. In short, it is necessary to keep the water body "fat, alive, tender and cool".

Third, do a good job in disease prevention. In autumn, bacteria are easy to breed and diseases are easy to occur, especially before and after White Dew, the epidemic peak of fish diseases, such as rotten Gill, enteritis, red skin, printing disease and other bacterial diseases and viral diseases such as hemorrhagic disease and so on. The prevention and treatment of fish disease should be based on prevention, prevention is more important than treatment, and the combination of external use and internal administration should be combined. Regularly sprinkle strong chlorine, dibromohydantoin, chlorine dioxide, povidone iodine, crystal trichlorfon and other drugs, every 15 days. Feed allicin, vitamin C, trisulfonamide and other baits, once a day, 6 times a day, one course of treatment a month to prevent the occurrence of diseases.

Fourth, do a good job in inspecting fish ponds. Inspect every morning, middle and evening, pay attention to observe the water color of fish ponds and fish activities, check whether the ridges and dams are damaged, leakage, etc., and make relevant records. The remaining sundries such as forage grass and dead fish in the fish pond should be removed in time. At the same time, according to the market situation, timely and appropriate amount of adult fish on the market, in order to reduce the fish carrying capacity of the fish pond and ensure the safety of the fish in the pond.