After spring, the temperature rose and each freshwater fish species was susceptible to disease. The reasons were divided into failure to deal with the accumulation of problems in the early period and temperature instability after the spring. In winter, the water temperature is low, and the problem is less. The farmers are also less concerned. In fact, winter ponds have problems and gradually accumulate: nutrient consumption and sediment quality problems. Nutritional consumption: Nutrient depletion of water bodies, algae bacteria tend to age. This is one of the reasons for the instability of the ponds after the spring; the stored energy of the fish is consumed in large quantities, the fish body is thin, and the constitution is poor. After the spring, it is easy to infect parasites, bacteria and fungi, and the incidence rate is increased. Bottom matter problem: Feeding continues after October of each year. As the water temperature drops, the decomposition of organic matter at the bottom slows down, and the dissolved oxygen increases, most problems are covered up in this situation, and the parasites and harmful bacteria multiply at a reduced rate. Slow, basically does not cause harm, so most ponds are unregulated. In the case of feeding the feed during the cold period, the produced bait feces is decomposed to consume less, and most of it accumulates at the bottom of the pond. For example, at the beginning of the twelfth lunar month in 2017, after the first cold wave suddenly returned, some areas had bacterial septicemia in some carp and aquaculture ponds. Comparing the diseased ponds to the unaffected ponds, the abrupt climate change (stress) is the cause, and the lack of treatment of sediment pollution is the root cause. The characteristics of the climate after the spring began: The temperature rose, the climate was unstable, and the problem of winter accumulation broke out at this time. Increased water temperature, decreased dissolved oxygen, enhanced toxicity of ammonia nitrogen, nitrite, etc., accelerated reproduction of parasites and harmful bacteria, accelerated decomposition of organic matter at the bottom, increased oxygen consumption, and increased pond pollution. Climate instability: water instability, algal bacteria instability, ammonia nitrogen, nitrite and other pollution treatment speed slows, the stress led to a decline in the body of cultured animals. These are the reasons for the subsequent onset of various freshwater fish species after the spring. It is recommended to deepen the water level in advance to help stabilize the water body. For ponds with large ponds and difficult water level elevations, it is recommended that fish be released before the temperature rises, which can effectively reduce the risk of disease. Maintain the pond water body with a certain degree of fatness, enhance the insulation effect and the ability to deal with pollution: maintain deep water level, promote environmental stability, and reduce the risk of water change, but the time for adding a single water should not be too long. Choose continuous sunny morning water for 3 hours~4 Hours; maintain high dissolved oxygen, rational use of aerators, after the first winter overheating time of the aerator should not be too long to reduce the back to the end of the stress, then change the bottom of the drug can be used as oxygen supplement; supplement water body nutrition to carbon Fertilizer and trace elements are the main ingredients, and at the same time, the use of low-temperature fertilizer and water bacterium preparations to enhance the utilization of the bottom nutrient. Persist in changing the bottom: The water temperature rises after spring and parasites begin to germinate. Insect pests with serious organic matter pollution are more serious. According to the actual conditions of the pond, changing the bottom a few times can effectively prevent pests from occurring. After the normal feeding, according to the amount of feeding, the bottom reform work shall be carried out. According to one bottle per ton of material, “Fu Di An II (recommended use area of ​​6 mu per bottle or more)†shall be changed and the old and new ponds shall be added or subtracted accordingly. When the weather is fine, it is appropriate to feed, supplement nutrition, and promote the recovery of aquatic and vivid objects. In March, the stocking rate of deposit ponds was 0.2% to 0.6%. Before the temperature reached 20°C and a large amount of feed, microecological preparations were regularly added to the feed to colonize the intestine of aquatic animals and thicken the intestine wall to prepare for the next large amount of feeding. Disclaimer: Some articles in this website have been transferred from the Internet. If you are involved in third party legal rights, please inform this website. phone Medical Device Consumables,Consumables Medical Products,Disposable Medical Paper Mouthpieces,Disposable Filter Spirometer Mouthpiece Hengshui Qifei Paper Products Co. 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Fresh water fish pond management points after spring