With more rain in autumn and suitable temperature, it is the season when fish grows fastest and grows fat, and it is also a crucial period for the harvest of fisheries throughout the year. Therefore, it is particularly important to grasp the management of the autumn fishing ponds. The feeding and management during this period has to increase production by more than 30% compared with general management; it is of great importance to improve the breeding efficiency and increase the income of fishermen. If it is a hot-water fish, it can also catch up with the city in the winter morning and reduce the loss of winter frostbite. Even if it is not listed, it can enhance the body's cold body after fattening and lay a good foundation for the safety of the fish. The technical measures for fattening fish ponds in autumn are: First, strengthen water quality management. Ponds reared for adult fish have more fish stocks, more fertilizer and more organic matter in the water. It is easy to cause deterioration of the water quality. Therefore, the residual baits and debris leftover from the fish should be picked up every day, and new water should be added in time according to the weather and the activities of the fish. To prevent deterioration of water quality: For ponds with convenient water sources, microfluidic water should be maintained or washed once every 10 days. For ponds lacking water sources, the average depth of water is 1 meter per mu for every 15 days to 30 days. 15kg to 20kg of quicklime is stacked in the waters around the pond; 1kg of lime per acre is used to add 10kg of quick lime, and water is added. Quantang spilled to clarify the pond water. The pond where the aerator is placed should catch every sunny day and start the aerator to send the upper dissolved oxygen layer to the lower layer to reduce nighttime oxygen deficiency. Second, top dressing bait. Fall should see the water fertilization, cultivation of water rich in biological feed, to meet the growth needs of larvae and earthworms. At the beginning of autumn, the temperature is higher, and the fertilization persists less often. If it is a fertilizer pond, a small amount of fertilizer is applied to prevent deterioration of water quality and maintain good water quality that is fat, live, tender and cool. Generally, 2.5 kg of urea and 5 kg of superphosphate are used to make the pool water green or tea green. If it is a semi-thin water pond, the main excrement of livestock that is fermented is mainly 400 to 500 kg. After 7 days to 10 days, it can quickly cultivate plankton to meet the needs of fish. At the end of autumn, the temperature of water gradually decreases. Organic fertilizers should be used to make the pool water become richer and richer, and plankton should multiply, and provide sufficient food for the wintering of fish. Third, feeding. From September to October, it is still a season for fish to feed and grow. In ponds that mainly feed on herbivorous fish or eating fish, they should be fed with green feed or other roughage. These feeds are eaten up by the fish and then fed together. Grain bait or other concentrated feeds are injected twice a day, and the amount of feeding is about 3% to 6% of the fish's body weight. After 10 months, according to the nutritional needs of different main cultured fish, the fish should be scientifically formulated and baited once a day. The amount of feeding should normally account for 1% to 3% of the fish's body weight. Feeding can last until mid-November. Fourth, prevent floating heads. For ponds with high intensive density and high yield, due to the large amount of fertilization and organic matter contained in the diet, fish activities are frequent, and the phenomenon of anoxic floating heads can easily occur. Every morning and evening, especially in the middle of the night, it is necessary to step up the tour. When fed, fish were found to be eating less, eating longer, and more residual bait in the pond. In particular, swimming grass grass ponds and no signs of grazing showed that the water began to lack oxygen. After the frightened fish in the daytime, visible waves appeared on the surface of the water, indicating that a "floating head" had appeared. When fish heads are found to have signs of floating heads, they will start aerators or inject fresh water into ponds to increase the amount of dissolved oxygen and properly discharge some of the old water. If there is no new water infusion and there is no aeration machine to increase oxygen, dissolve 5 kg or 20 kg salinized water per acre with alum, or use oxygenation agent according to instructions. The net of water and impurities in the clean water can reduce pollution and purify water quality. It also helps prevent floating heads. Fifth, control the source of disease prevention. Autumn temperatures are relatively moderate, pathogenic microorganisms are easy to breed, and it is also a season of fish disease. The bait and debris in the pond should be removed every day, and new water should be added in time according to the weather and the activities of the fish. Usually every half a month with 250 grams of bleaching powder dissolved in water, sprinkled around the food market, continuous splashing for three days, can also be added to the feed garlic seeds (0.5 kg per 100 kg feed), salt (per 100 kg feed plus 1 Kilograms) Prevention of bacterial fish disease. After the copper sulfate and ferrous sulfate mixture was dissolved in water, the whole pool was splashed (0.5 g of copper sulfate and 0.2 g of ferrous sulfate per cubic meter of water) to prevent parasitic diseases. At the same time, we must pay attention to the prevention of gills, enteritis, red skin, whiteheads, and trichoderma. If there are too many green ponds in the fish pond, it can splash copper sulfate in Quanchipi, and apply 0.7 grams per cubic meter of water. Add water to dissolve the entire pond, or apply 50 kg of plant ash per acre. Sprinkle it on the green mud moss and make the blue mud moss not visible. Sunshine and death. 6. Prepare for the winter. If the pond fish, which has not yet reached the market requirement through autumn fattening, will be prepared for winter. Over-winter fishing ponds should be sterilized by clear ponds to make the fishes in the ponds have a good water environment; the ponds should be 2 to 3 meters deep; the deeper the water, the better the warmth; the soft-shelled carp, squid, leather beard and other fierce carnivorous fish Classes can not be mixed for the winter, so as to avoid eating small, strong food and weak killings. For the tropical and subtropical fish wintering ponds, 80 m2 to 100 m2 of anti-frost sheds should be erected for each mu. They should be snagged with grass or woven film and placed in the deepest position of the leeward sunny pond, about 20 cm away from the water surface. Rotary Cultivator For Medium Sized Gearbox Shandong Dahua Machinery Co.,Ltd , https://www.agrodahua.com