Fish species are knowledgeable about autumn tube.

First, clear the pond in time. After 2 ~ 3 months of fish breeding ponds, the water quality has generally aged, natural bait decreased, hydrogen sulfide and other harmful gases and pathogens increased. After entering autumn, the fish species should be transferred to the pond which has been cleaned and sterilized for cultivation. Where there are difficulties in the turnover of water sources and fish ponds, all the fish can be temporarily reared, and then the original ponds can be disinfected with 75kg ~ 100kg of quicklime per 667 square meters, and the water quality will be fattened according to the conventional method, and the fish will be returned after the medicine disappears to ensure the purification of the living environment.

Second, separate cultivation management. Fish species should be reared reasonably according to different specifications, so that the specifications of fish species put back in the pond are the same. Because the large size fish has a large food intake and strong grabbing power, if the small size fish are released at the same time, the small fish will not get enough bait and their physique will decline. Fish species of more than 16 cm can be placed in adult fish ponds, and small fish species need to be cultivated in a special pond, so as not to lead to competition for food, resulting in the extreme phenomenon that the strong are stronger and the weak are weaker.

Third, patrol the pool regularly. During the period of fish breeding, we should observe the feeding and growth of fish in the pond every day, pay attention to the change of water quality, change new water frequently, and add new water once a week. And often clean the food field, timely fish out the residue bait, every half a month around the food farm with bleach 0.5 kg of water sprinkled, regular feeding bait, preferably twice a month, each time continuously for 3 days, found that sick fish, dead fish should be fished out in time for deep burial, at the same time diagnosis, give drug prevention and treatment.

Fourth, reasonable sparse. The cultivation of larger fish species in autumn is an important part of improving the overwintering survival rate of fish species, which should be reasonably sparse according to the size and depth of water surface to promote the growth of fish species. In the pond with a water depth of 1.5m, there are 4000 ~ 6000 fish species with a length of 7cm ~ 8cm per 667m2, and the body length can reach 13cm ~ 17cm by the end of the year, which is of great significance to improve the income of culture.