In autumn, the cold and warm temperatures and appropriate water temperatures are the peak season for the growth of fingerlings. To improve the management of autumn fingerlings is a direct measure to increase economic efficiency. The author believes that the following techniques should be applied to the management of fingerlings in the fall. First, the clear pond. After 2-3 months of cultivation of fish ponds, in general, water quality will age, natural foods will be reduced, and harmful substances such as hydrogen sulfide and pathogens will increase. After the fall, the fish should be transferred to ponds cleared by clear ponds for cultivation. Where water and fish ponds are difficult to turn around, all the fish can be transferred out of stocking, and then 75-100 kilograms of quick lime can be disinfected per acre of the original pond, and water fertilization can be carried out according to conventional methods until fish disappears. The species turned back to ensure the purification of the living environment. Second, scientific feeding. In autumn, the weather is suitable. Fish feeds are large and grow rapidly. Feed must be guaranteed. In the case of grass-breeding fish species, with the oyster and squid fish species pools, caster feed should be used, and concentrates should be properly fed. Every day, ten thousand grass carp species are fed with duckweed, tender grass or aquatic plants 70-90 kilograms, and concentrate feed 1.5-2.5 kilograms. First cast a green feed, and then concentrate on the fodder to avoid eating grass carp and other fish. Feeding should be guaranteed, quantitative, timing, and positioning. The polyculture of cockroaches and squid need to be fertilized regularly, fertilize once every 10-15 days, apply 70-90 kilograms of fermented manure per acre, and keep the water transparency at 30-35 centimeters. In order to use grass carp as the main species for carp and carp species, fertilization should be given priority, and feeding should be supplemented. In addition to basal fertilization, top dressing is applied once every 5-10 days, and the amount of manure and livestock manure is 80-100 kg per mu. At the same time, 2-4 kilograms of feed per 10,000 species of fish are sown every day. For the grass carp, 60 to 90 kg of grass carp is fed to every 10,000 grass carp before consubstantial feeding. Third, the separation and management. Fish species should be properly reared according to different specifications, so that the specifications of the species to be released in the same pool are the same. Because large-scale fish species have large food intake and strong grab power, if small-scale fish species are placed at the same time, the fish will lose their body feed due to insufficient feed. Fishes over 16 cm in size can be placed in adult fish ponds. Smaller fish species need special pools for cultivation, so as not to cause food shortages, and stronger and weaker weaker extremes occur. Fourth, regular patrol pool. During the cultivation of fingerlings, it is necessary to insist on daily patrols to observe the fish’s feeding and living conditions, pay attention to changes in water quality, change new water, and add new water once a week. And often clean the food market, remove the residue leftover bait in time, every half a month in the food market with bleach bleach 0.5 kg of water sprinkling, regular feeding baits, preferably twice a month, each feeding 3 consecutive days. The diseased fish and dead fish should be removed and buried in a timely manner. At the same time, they should be diagnosed and given drug control. Fifth, reasonable and thin. It is an important part of increasing the survival rate of wintering fish species that large-sized fingerlings are bred in the fall. It should be reasonably diluted according to the size of the water surface, water depth, etc. to promote the growth of fingerlings. For ponds with a depth of 1.5 meters, a total of 4000-6000 fishes of 7-8 cm in size are placed per acre, and the body length can be as high as 13-17 cm at the end of the year, which is of great importance to raising the aquaculture income.
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