After the seedlings return to the green, each mu can be stocked size 10 cm large mouth catfish species 30, other fish about 150, according to the conventional management of paddy fish farming methods, each mu can be more than 40 kilograms of large mouth catfish adult fish, other adult fish 50 kilograms to 100 kilograms. The technical guidance is:

1. feeding management

(1) feed feeding: large mouth catfish feed chilled fish, snails and mussels meat, earthworms, animal offal, etc., and its eating is mainly in the early morning and at night. General day baiting 2 times, that is, about 6 o'clock in the morning once, 6 o'clock in the afternoon and then cast once, to set up a fixed point of the feed table, with earthworms and other large mouth catfish food food for enticing and domestication, the feed should be made to achieve the size of the right mouth, do not fit the mouth of the manual or mechanical chopping, the amount of bait should be according to the weather, the water temperature and the eating situation is flexible, generally controlled between 5% and 12%. Feed number 3.5 to 4.5.

(2) water quality management: large mouth catfish like fresh water, rice paddy breeding large mouth catfish, due to a large number of feed feeding, the water quality is susceptible to contamination, should be regularly splashed quicklime, timely filling of new water.

(3) adhere to the daily inspection, found fish disease timely symptomatic medication, and at the same time do a good job of escape prevention, anti-theft work.

2. Disease prevention and control of large-mouth catfish

Large-mouth catfish is highly resistant to disease, and generally does not occur in the adult stage of the disease, the species stage of common diseases and their prevention and control are described below:

(1) hemorrhagic disease

Symptoms and hazards: the disease occurs in the species stage of the 5 cm to 7 cm, the symptoms of the disease and the popularity of the breeding of fish hemorrhagic disease is similar to some years, the symptoms of the fish are similar to those of the breeding of fish hemorrhagic disease. Diseased fish and fish species that died soon after the disease around the eyes, the top of the head and the sides of the abdomen red and congested, rotting and bleeding, gill filaments white, red and swollen anus, microscopic examination can not find parasites.

Treatment: at the beginning of the disease, the first day of the fish pond with 0.3ppm fish and shrimp An splashing disinfection, while using the Chinese Academy of Sciences Institute of Aquatic Sciences production of fish blood Kang at 1% to 2% content of mixed feed feeding, and then two consecutive days of 0.4ppm fish and shrimp An splashing, and a daily change in the water and sewage, while 3% to 5% of fish blood Kang mixed bait feeding for five days.

(2)Small Melon Worm Disease

Symptoms and hazards: Small Melon Worm Disease occurs in the intensive cultivation of large-mouth catfish seed stage, when the temperature is low, it is easy to be infected with this disease. After the onset of the disease, most of the fish do not eat, in the surface of the cluster floating, the fish body black, the top of the head seems to have a layer of white film, one after another death, was a violent occurrence. Sick fish microscopic examination of the fish body surface and carp part of a large number of small melon worm.

Treatment: the fish will be concentrated with "insecticide" emulsion 7.67ppm dip fish body for half an hour, after dipping all the fish species will be transferred to another empty pool to feed, the original pool is thoroughly cleaned and disinfected before releasing the fish. For prevention, use 0.35ppm to 0.45ppm of "Insecticide" emulsion to sprinkle the fish once a day for 5 consecutive days.

(3) fingerling disease, rotifers

Symptoms and damage: in the 3 cm or more fish species stage, the sick fish body color black, slow swimming, not much food for several days, naked eye observation found that the fish gills swollen, gill filaments mucus increased, and death, microscopic examination of the gill filaments of the fish, found that each field of view of the 5 to 6 fingerling worms, but also some of the rotifers.

Treatment: after the discovery of the disease, all the fish will be concentrated, with 20ppm potassium permanganate solution for 15 minutes, the fish will be dispersed after the change of new water, the second day to 4 days with the mirex 1ppm splash the whole pool for three days, pay attention to the diligent change of water.