In order to restore the post-disaster aquaculture production as soon as possible and to make up for the lack of fish seedlings, it is possible to use the autumn fish fry to cultivate fish species for future adult culture. The technical points are now described as follows:
First, broodstock cultivation. After the water recedes, we must seize the time to clean up the fish pond, disinfect it, and separate the broodstock. For broodstock and broodstock broodstock cultivation, basal fertilizer should be applied, fertilizer should be applied in a timely manner, and bean paste should be splashed; grass carp and broodstock broodstock should be fed with green feed and supplemented with a certain amount of concentrated feed. During the cultivation period, the gonad development of the broodstock was promoted by strengthening water quality control and fine feeding of the spermatic tube.

Second, prenatal preparation. The temperature of autumn fish species is high, and the technical difficulty is high. All preparations must be done well. The whole process of breeding should be carefully planned, such as checking the gonad development and breeding equipment, selecting cool weather, and selecting experienced operators. Conditionally available deep well water regulates water temperature.

Third, oxytocin insemination. Grass carp production using luteinizing hormone-releasing hormone analogues (LRH-A), cockroach, eel production of human chorionic gonadotropin (HCG) or type A, B mixed hormones, take a shot, keep the environment quiet after injection. In the early stage of the urine-producing pool, micro-flowing water is maintained. The flushing stimulation is started 2 to 4 hours before estrus and the network is checked from 6 hours to 10 hours. If the abdomen has eggs out of the abdomen, artificial insemination can be performed. Postpartum broodstock can be applied to external trauma with chlortetracycline ointment, and immediately after the injection of penicillin or postpartum health care agents.

Fourth, hatch management. Incubation water requirements are fresh and non-polluting, and need to be filtered through 40 mesh to 50 mesh screen mesh, dissolved oxygen should be kept above 4 mg/L, pH value between 7 and 8. About 200,000 capsules of fertilized eggs were placed in a 200 kg incubator tank. The flow rate during hatching was based on the "high-low-high-low" operating procedure, so that the eggs were overturned near the center of the tank. Incubation water If there are too many large zooplankton such as sword leeches, 90% crystals of trichlorfon 0.2g-0.5g can be killed per cubic metre. The premature rupture of fish eggs can be treated with potassium permanganate solution.

Fifth, shipment of fry. When the fry larvae are inflated (see waist points), the yolk sac basically disappears, and when the mouth can feed, it can be discharged. The fry were filled with oxygen in a 30cm-70cm nylon bag. Each bag contained about 50,000 fry. The way to prevent high temperature and direct sunlight, and pay attention to adjust the water temperature, so that the water temperature difference between the incubator, oxygen bag and pond does not exceed 3 °C.

Sixth, Uruguayan cultivation. The cultivation ponds need to be cleaned and disinfected beforehand, enough basal fertilizer should be applied, and natural biological food should be cultivated. 30,000 to 50,000 fish fry per acre should be raised. The fish fry ponds should be raised in cages before being fed with 1 cooked egg yolk. Water quality is thin, with 3kg soybeans per acre milled into pulp for 3 to 4 times a day, and injection of new water to prevent floating heads. After about 10 days of cultivation, when reaching 2 cm of Uzbekistan, several times of nets can be used to exercise, and the fish can be raised in separate ponds.

VII. Feeding of fingerlings. Uzi passed through the early ponds and sparsely laid and fed, and then it can grow into fish species of about 10 cm. The species of fish is cultivated from 3000 to 5000 tails per acre of stocked urchins, and the main cultivating and breeding cultivars are determined according to the conventional polyculture ratio. Ponds with grasses and squids should be fed as much as possible with duckweed, aquatic plants or tender grasses; ponds with squid and squid should be topped with organic fertilizers and chemical fertilizers, and they should be properly fed with bean cakes, cakes and cotton. Cakes and other commodity feeds promote rapid growth of fingerlings.

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