Winter fish species pay attention to what?

1. Pond "five changes." That is, the small change is large, the shallow change is deep, the death (water) is changed to live (water), the leak (water) is changed to security (water), and the grab (insurance) is changed to defense (flood). With conditions, new high-yielding fish ponds can be built. 2. Clear pond disinfection. Should be carried out on a sunny day. 1 Dry method (retaining 10 cm of water), 80 to 100 kg of lime for every 667 square meters, or 4 to 5 kg of chlorine powder containing 30% chlorine. 2 with water (remaining water 1 meter), use lime for every 667 square meters 150 kilograms, or use chlorine bleach 30% of 12 to 13 kilograms. Add lime or bleach to dissolve water and spray evenly. After 7 days of clear pond, fish can be released. 3. Fertilizer pond. After clearing the pond, apply enough basic fertilizer to apply 250 to 500 kilograms of man and animal manure per 667 square meters. New pool can be applied. After fertilization, winter water (wax water) can be injected to cultivate water quality and cultivate natural food. Fat ponds can be applied less or not. 4. Pay close attention to early release. The winter solstice to the beginning of spring is a good season for stocking. The so-called “was water stocking and the fish species are swift.” At this time, the water quality is stable, the fish is strong, the scales are tight, the activity is small, the operation is not easy to hurt, and it is beneficial to prevent diseases and promote early eating. Gain weight quickly. 5. Specifications and quality. Hericium 0.5 kg or more, grass carp 0.4 kg or more, carp, carp 13 to 20 cm, carp, carp 10 to 13 cm, carp, carp 12 cm. Fish species require uniform and uniform specifications, but also have high flesh thickness, fat tail, scales intact, non-destructive fins, body color, vibrant beat and so on. 6. Disinfection of fingerlings before stocking. After netting exercise and drug disinfection. Generally 3% to 5% saline can be used to dip for 15 minutes. It is best to vaccinate grasses and fish with conditions to prevent bleeding. 7. The proportion of polyculture and the number of stocking should be adapted to local conditions and be flexible. 8. Fish stocking management. When the weather is cold, it is necessary to deepen the water level to more than 2 meters to slow down the water temperature. If snow is frozen, it is necessary to remove snow and oxygen. When the water temperature increases, it may be appropriate to cast some fine material to promote early eating and early growth.

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