Non-pollution stingray carp stocking

The new local standards for 18 pollution-free aquatic products newly implemented by the pollution-free stingray carp have made strict regulations for the stocking and feeding management of stingray fingerlings. According to Song Wenping, deputy director of the Municipal Fisheries Research Institute, stingray fingerlings must have passed the quarantine inspection at the quarantine station and have a body length of 4 cm or more. The percentage of bleaching powder should be well controlled for the disinfection of fingerlings. Within 8 grams. Observe the observation at any time during disinfection and immediately release the fish in the event of adverse reactions. The stocking density should be reasonable, and the stocking density is generally 2,000 to 2,500 per 0.067 hectare. It is also crucial to properly coordinate with other fish. After one week of stingrays being planted, other fish that do not conflict with the stingrays can be released. Each of the 0.067 hectares should be placed in 200 tails and 10 to 15 cm in length. White pelicans, 100-body calyxes 8 to 10 cm long, and grass carp 80 to 100 tails 10 to 15 cm or 6 to 8 cm long. Feeding and management should also be cautious. Feeding amount should be 6%~8% of the fish's body weight. The bait should adhere to the principle of timing, positioning, qualitative and quantitative. Feeding feed should meet the safety limit standard for pollution-free food and fish feed, supplemented with animal feed such as small trash fish, animal internal organs and scraps, snails, etc., and be fed after boiling or disinfecting. In the initial stage of breeding, fresh water should be filled once every 10 to 15 days. Each water injection is 5 to 15 centimeters. As the water temperature rises, the transparency drops. Every 5 to 7 days water injection, 15 to 30 centimeters each time, to increase the pond The water level.

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