After the beginning of autumn, the weather gradually cools. Although it is difficult to eliminate the heat, there is still the “fall tigerâ€. However, the overall trend is that the daily temperature difference is gradually obvious. It is often hot during the day and cooler at night. Autumn is a key season for aquaculture production management. If you are careless, it will cause major losses and even make any efforts. The following technologies and management measures are proposed:
Water quality control: One must change the water in time, a small number of times, to absorb the middle and upper water, in order to increase the types of plankton, prevent and reduce the breeding of green algae to form "blue lake water." Autumn crab ponds should gradually increase the amount of water exchange, a small number of times, while entering the side row, to prevent the water level caused by high floatation and death, and every 10 days or so, spill lime, increase the pool water calcium, dosage 5 kg / mu Keep the PH value of the pool water 7.8~8.5, and the transparency is 30 cm~40 cm, which will help the crab shell thicken and harden, and promote healthy growth.
Feed Feeding: Feeding of conventional fish should improve the quality of feed. The amount of daily feed is 5%-6% of the weight of fish in the pond; 60% of animal feed is required in shrimp feed, and the amount of daily feed is in the weight of pond shrimp. 7%-8%; increase the proportion of crab feed, crab feed animal feed 65%, daily feed is 10% of the total weight of crabs. From the beginning of October onwards, as the water temperature declines, the amount of feeds will gradually decline, and the daily feed volume will drop to 3%, 4%, and 4%-5% of the total weight of fish, shrimp, and crab respectively. Another early autumn and mid-autumn period is the peak period of river crab feeding on plants and snails. We must pay close attention to ensure that crabs are used for food and eat, but also have a high amount of ponds. Insufficient ponds should take measures to make up water plants and snails. Soft-shelled turtle breeding, into the fall of soft-shelled turtle farming should be based on water quality regulation. It is suggested that farmers first use water purifiers to reduce the ammonia nitrogen and nitrous acid in the water at a faster rate, and after two days supplement the water transfer biological agents (such as photosynthetic bacteria, nitrifying bacteria, etc.), to expand the beneficial micro-organisms of the water body, and to make the aquaculture water body changeable. Good and keep stable for a long time. To ensure the quality of feed, in line with the turtle's demand for protein and fat, can be added in the feed 20% or less of fresh fish or high-quality chilled fish slurry fed, can greatly enhance the soft-shelled turtle feeding intensity, increase its growth rate and fullness . Due to the increase in the amount of soft-shelled turtles, adding drugs for the prevention of enteritis, such as andrographis paniculata, garlic, etc., are used for a few days for better results.
Disease prevention and treatment: "Blooming out of the head, fish continue to die." Judging from the historical experience and practice of pond fish farming, fish disease will enter another popular peak season after the beginning of autumn. Therefore, to master the law of the occurrence of fish in the fall, and take the positive measures of “prevention without disease, early treatment with diseaseâ€, can we get a multiplier effect of prevention and control. It is recommended to adopt a combination of "elimination" and "internal treatment" to prevent the occurrence of diseases. Every 20 days or so, use Chlorine Dioxide and shrimp and crabs to disinfect the whole pool once. At the same time, detoxification, calcium, oxytetracycline and other drugs are added to the feed once a month. For ponds with poor water quality and reduced aquatic weeds, the “first killing after sterilization†method is used. The shrimp and crabs are used to net the fimbriae, the fish use the trichlorfon, the fish, shrimp and crabs are mixed with the fish and the nemesis, and the whole pool is splashed; The use of chlorine preparations or iodine preparations will start the process of sterilizing in the whole pool; in late autumn, cold air will come and the temperature will drop. Tropical breeding animals such as white prawn and Macrobrachium rosenbergii will be attacked by cold air, and preparations for the market and measures for keeping warm are needed.
Every day, stick to the morning and evening patrol ponds, check the activities of fish, shrimps and crabs, eat and eat, check the water color, transparency, and PH value, and timely remove the rot and the baits and sterilize and clean the food field. For river crabs, soft-shelled turtles and other easy-to-escape aquaculture species, pay attention to see if there are any loopholes in the anti-escape setting and pools, check the inlet and outlet anti-escape facilities, and strengthen anti-theft inspections at night.
Water quality control: One must change the water in time, a small number of times, to absorb the middle and upper water, in order to increase the types of plankton, prevent and reduce the breeding of green algae to form "blue lake water." Autumn crab ponds should gradually increase the amount of water exchange, a small number of times, while entering the side row, to prevent the water level caused by high floatation and death, and every 10 days or so, spill lime, increase the pool water calcium, dosage 5 kg / mu Keep the PH value of the pool water 7.8~8.5, and the transparency is 30 cm~40 cm, which will help the crab shell thicken and harden, and promote healthy growth.
Feed Feeding: Feeding of conventional fish should improve the quality of feed. The amount of daily feed is 5%-6% of the weight of fish in the pond; 60% of animal feed is required in shrimp feed, and the amount of daily feed is in the weight of pond shrimp. 7%-8%; increase the proportion of crab feed, crab feed animal feed 65%, daily feed is 10% of the total weight of crabs. From the beginning of October onwards, as the water temperature declines, the amount of feeds will gradually decline, and the daily feed volume will drop to 3%, 4%, and 4%-5% of the total weight of fish, shrimp, and crab respectively. Another early autumn and mid-autumn period is the peak period of river crab feeding on plants and snails. We must pay close attention to ensure that crabs are used for food and eat, but also have a high amount of ponds. Insufficient ponds should take measures to make up water plants and snails. Soft-shelled turtle breeding, into the fall of soft-shelled turtle farming should be based on water quality regulation. It is suggested that farmers first use water purifiers to reduce the ammonia nitrogen and nitrous acid in the water at a faster rate, and after two days supplement the water transfer biological agents (such as photosynthetic bacteria, nitrifying bacteria, etc.), to expand the beneficial micro-organisms of the water body, and to make the aquaculture water body changeable. Good and keep stable for a long time. To ensure the quality of feed, in line with the turtle's demand for protein and fat, can be added in the feed 20% or less of fresh fish or high-quality chilled fish slurry fed, can greatly enhance the soft-shelled turtle feeding intensity, increase its growth rate and fullness . Due to the increase in the amount of soft-shelled turtles, adding drugs for the prevention of enteritis, such as andrographis paniculata, garlic, etc., are used for a few days for better results.
Disease prevention and treatment: "Blooming out of the head, fish continue to die." Judging from the historical experience and practice of pond fish farming, fish disease will enter another popular peak season after the beginning of autumn. Therefore, to master the law of the occurrence of fish in the fall, and take the positive measures of “prevention without disease, early treatment with diseaseâ€, can we get a multiplier effect of prevention and control. It is recommended to adopt a combination of "elimination" and "internal treatment" to prevent the occurrence of diseases. Every 20 days or so, use Chlorine Dioxide and shrimp and crabs to disinfect the whole pool once. At the same time, detoxification, calcium, oxytetracycline and other drugs are added to the feed once a month. For ponds with poor water quality and reduced aquatic weeds, the “first killing after sterilization†method is used. The shrimp and crabs are used to net the fimbriae, the fish use the trichlorfon, the fish, shrimp and crabs are mixed with the fish and the nemesis, and the whole pool is splashed; The use of chlorine preparations or iodine preparations will start the process of sterilizing in the whole pool; in late autumn, cold air will come and the temperature will drop. Tropical breeding animals such as white prawn and Macrobrachium rosenbergii will be attacked by cold air, and preparations for the market and measures for keeping warm are needed.
Every day, stick to the morning and evening patrol ponds, check the activities of fish, shrimps and crabs, eat and eat, check the water color, transparency, and PH value, and timely remove the rot and the baits and sterilize and clean the food field. For river crabs, soft-shelled turtles and other easy-to-escape aquaculture species, pay attention to see if there are any loopholes in the anti-escape setting and pools, check the inlet and outlet anti-escape facilities, and strengthen anti-theft inspections at night.
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