I. Timing of shrimp species rearing With the warming of the weather, when the water temperature rises above 20°C, the shrimp begins to shell out. At this time, the shrimp body is susceptible to bruising. Before stocking, ponds should be well-grounded and quickly disinfected with bleaching powder, active iodine and other drugs. Ponds with moss, green algae, and bluegrass should also be sprayed once with copper sulfate. There is no need to artificially dig a ditch in the pool without shrimp gullies, which will not only facilitate the accumulation of water in the pool, but also facilitate the capture of shrimp. The stocking rate per acre depends on the size of the shrimp, generally controlled at 10-20 kg.
Second, water quality management Aquaculture ponds have been restocking the water level is not easy to be too low, the minimum water level maintained at 60 cm or more, add fresh water at intervals of 7 to 10 days. Water-slim ponds should stack 200-400 kilograms of fermented organic fertilizer and 5-10 kilograms of chicken manure. It plays a role in cultivating fertilizers, increasing natural animal foods, and reducing the occurrence of three hazards (moss, stinky green sand, blue net algae) in the pool. If the pond fertility is more than enough, then after the temperature rises, apply an inorganic fertilizer, 5~7.5 kg per mu. At the same time, the pond should be properly cultivated and transplanted with aquatic plants, accounting for about 30% of the total area.
Third, do a good job bait feeding weather When the water temperature rises above 18°C, feed food in time. Start a meal every day, increase the temperature to normal once and then increase to the afternoon. Feed them with green barley, wheat bran, bean cake or full-price shrimp feed, and add animal feed such as small trash fish, fish meal, and feedstuffs to shrimp ponds. 6-3% of the amount. Do a good job of inspection after feeding, according to the daily diet of shrimp, increase or decrease the amount of feed in time to adjust, not only to prevent waste, but also to prevent inadequate feeding.
Fourth, to prevent the hazards of shrimp disease After stocking, normal shrimp ponds can be used in the middle of March bleaching powder, active iodine Quanchiposa once to prevent bacterial infection caused by bumps. During the inspection, if ciliosis is found in the shrimp body (time), the “parasites†must be used first to kill the parasites, and then the bactericidal drugs (such as chlorine dioxide) should be used to kill the bacteria in intervals of 5-7 days. Prevent black shank disease and red spot disease.
5. Anti-floatation can't be neglected Spring will not be like a large number of hypoxic floating heads like high temperatures in summer, but after a sudden increase in temperature, in case of prolonged rainy weather, combined with shallow water level, poor water quality, improper use of drugs, and death of large numbers of blue algae After the precipitation rot, dried pond ponds after the sun did not drink aquaculture, shrimp species stocking too much, sick shrimp disease, etc., it is easy to cause hypoxic floating head. Therefore, it is still necessary to look closely at shrimp ponds, pay attention to changes in weather and water quality, not blindly use drugs, pay attention to adding fresh water frequently, and do a good job of anti-floating work. For shrimp ponds with high stocking densities, aerators should be activated at noon for 1-2 hours to increase dissolved oxygen in the water to prevent dead shrimp caused by lack of oxygen.
Second, water quality management Aquaculture ponds have been restocking the water level is not easy to be too low, the minimum water level maintained at 60 cm or more, add fresh water at intervals of 7 to 10 days. Water-slim ponds should stack 200-400 kilograms of fermented organic fertilizer and 5-10 kilograms of chicken manure. It plays a role in cultivating fertilizers, increasing natural animal foods, and reducing the occurrence of three hazards (moss, stinky green sand, blue net algae) in the pool. If the pond fertility is more than enough, then after the temperature rises, apply an inorganic fertilizer, 5~7.5 kg per mu. At the same time, the pond should be properly cultivated and transplanted with aquatic plants, accounting for about 30% of the total area.
Third, do a good job bait feeding weather When the water temperature rises above 18°C, feed food in time. Start a meal every day, increase the temperature to normal once and then increase to the afternoon. Feed them with green barley, wheat bran, bean cake or full-price shrimp feed, and add animal feed such as small trash fish, fish meal, and feedstuffs to shrimp ponds. 6-3% of the amount. Do a good job of inspection after feeding, according to the daily diet of shrimp, increase or decrease the amount of feed in time to adjust, not only to prevent waste, but also to prevent inadequate feeding.
Fourth, to prevent the hazards of shrimp disease After stocking, normal shrimp ponds can be used in the middle of March bleaching powder, active iodine Quanchiposa once to prevent bacterial infection caused by bumps. During the inspection, if ciliosis is found in the shrimp body (time), the “parasites†must be used first to kill the parasites, and then the bactericidal drugs (such as chlorine dioxide) should be used to kill the bacteria in intervals of 5-7 days. Prevent black shank disease and red spot disease.
5. Anti-floatation can't be neglected Spring will not be like a large number of hypoxic floating heads like high temperatures in summer, but after a sudden increase in temperature, in case of prolonged rainy weather, combined with shallow water level, poor water quality, improper use of drugs, and death of large numbers of blue algae After the precipitation rot, dried pond ponds after the sun did not drink aquaculture, shrimp species stocking too much, sick shrimp disease, etc., it is easy to cause hypoxic floating head. Therefore, it is still necessary to look closely at shrimp ponds, pay attention to changes in weather and water quality, not blindly use drugs, pay attention to adding fresh water frequently, and do a good job of anti-floating work. For shrimp ponds with high stocking densities, aerators should be activated at noon for 1-2 hours to increase dissolved oxygen in the water to prevent dead shrimp caused by lack of oxygen.
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