Key points of adult fish management after autumn

After the beginning of autumn, the water temperature begins to drop, and fish eat more and more vigorously, which is also a golden period for fish production and growth, so management should be strengthened and the following key points should be mastered:

First, strengthen baiting and feeding. At this time, the feeding should be based on concentrate, with emphasis on fattening and fattening by eating fish at the bottom. At the same time, attention should be paid to the collocation of varieties in coarse and coarse fodder to ensure that the nutrition of fish feed is full and comprehensive. Grass carp should be properly fed with grass carp, herring should be fed with snail feed, silver carp and bighead carp should be fertilized properly. After entering the autumn, the amount of fertilizer applied less frequently, and mainly inorganic fertilizer, but also according to the situation of fish, water fertility, weather and other specific grasp.

Second, adjust the water quality reasonably. (1) to add fresh water, generally add water 4 times 5 times a month, 1 hour each time, and the amount of water is 5% and 10%. (2) sprinkling quicklime, quicklime can neutralize hydrogen ions, increase calcium, increase water fatness, disinfect and sterilize at the same time to prevent and cure diseases. Usually every semimonthly, 20,25kg per mu.

Third, arrest at the right time and pay attention to daily management. After autumn, some fish have reached the commodity standard. if they continue to feed, eat a large amount of food and grow slowly, they should be caught and listed in time to reduce the density of fish in the pond so as to accelerate the growth of fish that do not meet the specifications. Through the accumulation of loading and unloading, the deposition of organic matter at the bottom of the pool is more and more, in case of weather changes, it will lead to flooding the pond and observe the activities of the fish in time.

Fourth, prevention and control of fish diseases. After entering autumn, fish are very easy to develop rotten Gill and enteritis complications. In practice, local farmers use rape oil and ginger mixture to treat the complications of rotten Gill and enteritis of grass carp. The formula of this medicine is introduced as follows: 750 grams of rape oil and 250 grams of ginger per mu of pond. First cook the vegetable oil in the pan, then pour the chopped ginger into the oil pan and boil for 20 minutes, then pick it up, put it in a bucket, rinse into the right amount of water, stir it well, and sprinkle it all over the pool, especially next to the table frame. Take the medicine once a day, or every other day, and throw it twice in a row. Three points should be paid attention to when using it: sprinkle evenly; choose sunny days to work; change water five days after splashing (especially in hot weather, change water very frequently)