Fengli Town, Rudong County, Nantong City, Jiangsu Province supplies a large number of crabs every year, such as Jiangsu, Anhui, Shanghai, Hubei, etc. Many local farmers rely on this one to embark on the road to prosperity. Recently, the town’s fishery science and technology instructor visited the demonstration households. Interact with typical demonstration households and combine the technical opinions of the expert group to provide the following opinions on the management of deduction crab rearing for reference by the demonstration households.
First, strengthen the feeding and management, and cultivate the specifications of crabs. Make sure that the listed crabs are between 60-80. Now it is appropriate for seedlings to have a specification of about 200 cats per kilogram. Miaotai should prevent old crabs, reduce the protein content in feed, and feed duckweed in appropriate amounts, and feed them once in the evening. Miaoxiao increase the amount of feeding, feeding once in the morning and evening, it is necessary to dilute the water and promote the growth of crabs.
Second, protect water quality and create a deduction crab ecological environment. The water quality is fresh, live, tender, and cool. The transparency is more than 30cm. The PH value of the regulating pond should be 7.5-8.0. The pH should be adjusted with quicklime. It should be applied once every 15 days for 10kg to 20kg per acre (667m3). The amount of lime used is gradually increased. According to the principle of “before shallow, medium and deep, and after stableâ€, the water level is adjusted.
Third, prevent diseases and improve the survival rate of dung beetles. In early September, the ciliates of the crabs will be prevented from using 500 grams of a net bag of fibrin per acre. Chlorine dioxide will be used once a month. The amount of 120-150 grams per acre will be used on sunny mornings.
Fourth, adhere to the survey pond, observe the crab shell, the remaining food, etc., to prevent predators, and routine inspection anti-escape facilities, repair cracks.
V. Keep abreast of the deduction crab market, often communicate with instructors and typical model households, and sell quality crabs.
Sixth, do Tangkou log, earnestly sum up the experience and lessons of the past year, lay a good foundation for better breeding in the next year.
First, strengthen the feeding and management, and cultivate the specifications of crabs. Make sure that the listed crabs are between 60-80. Now it is appropriate for seedlings to have a specification of about 200 cats per kilogram. Miaotai should prevent old crabs, reduce the protein content in feed, and feed duckweed in appropriate amounts, and feed them once in the evening. Miaoxiao increase the amount of feeding, feeding once in the morning and evening, it is necessary to dilute the water and promote the growth of crabs.
Second, protect water quality and create a deduction crab ecological environment. The water quality is fresh, live, tender, and cool. The transparency is more than 30cm. The PH value of the regulating pond should be 7.5-8.0. The pH should be adjusted with quicklime. It should be applied once every 15 days for 10kg to 20kg per acre (667m3). The amount of lime used is gradually increased. According to the principle of “before shallow, medium and deep, and after stableâ€, the water level is adjusted.
Third, prevent diseases and improve the survival rate of dung beetles. In early September, the ciliates of the crabs will be prevented from using 500 grams of a net bag of fibrin per acre. Chlorine dioxide will be used once a month. The amount of 120-150 grams per acre will be used on sunny mornings.
Fourth, adhere to the survey pond, observe the crab shell, the remaining food, etc., to prevent predators, and routine inspection anti-escape facilities, repair cracks.
V. Keep abreast of the deduction crab market, often communicate with instructors and typical model households, and sell quality crabs.
Sixth, do Tangkou log, earnestly sum up the experience and lessons of the past year, lay a good foundation for better breeding in the next year.
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