I. Fattening pond conditions
1. Cement pool area is 50 square meters to 100 square meters. It can store more than 1.2 meters of water and is convenient for drainage and drainage. Spread 10 to 15 centimeters of fine sand on the bottom of the pool and sterilize it after 10 days of soaking and then use it to build a plastic greenhouse.
2. The area of ​​earthen pond is from 5 mu to 10 mu. It can maintain a water level of over 1.5 meters without leakage. It is convenient for drainage and drainage. The depth of silt does not exceed 15 cm. 10 days before the crab enters the pool, clear the pond with quick lime and fill it with water a week later. The plastic canopy can still be installed as described above.
3. There is no need to build a plastic greenhouse insulation facility in the indoor area, and it is possible to carry out short-term maintenance by directly using empty houses to build smooth, non-leakable concrete floors. The general area is 10 to 30 square meters.
Second, the density of cultivated cement ponds is 1.5 kg to 2 kg per square meter. Before the crabs enter the pool, aquatic animals like water peanuts need to be put in the pond, accounting for 1/3 of the water area, for their habitat and feeding. The earthen pond is 500 to 700 kilograms per mu, and the pond also needs to put in 1/3 to 2/5 of the aquatic plants occupying the water area, so that the crab can safely avoid the enemy and feed. The room is 3kg to 5kg per square meter.
Third, bait feeding in the winter greenhouses using plastic greenhouses, can keep the temperature of the greenhouse in the greenhouse most of the water temperature above 15 °C, to ensure normal growth of crabs in the appropriate water temperature. In the previous stage of feeding, bait should be dominated by plant foods. Such as soaked or cooked wheat, soybeans, sweet potatoes, vegetables and so on. Each day, the amount of feeding is about 5% to 8% of the crab weight. It is fed once a day in the afternoon and then in the afternoon. It is fed from 10 a.m. to 11 a.m., and the feed is fed 30%, and it is fed from 4 to 5 p.m. 70%. In the latter stage of feeding, the animal protein content in the food should be appropriately increased, and small fish, shrimp, snail meat, and compound feed can be fed in an appropriate amount.
Fourth, daily management
1. Management of greenhouses In order to maintain the water temperature, it is necessary to pay attention to the sealing of the plastic film and the poolside. Do not open the greenhouse door for a long time or open the door frequently. If the agricultural film is damaged, repair it in time. Depending on the water quality, the water in the pool will be changed from 1/5 to 1/3 every 1 to 3 days when the weather is warm in the afternoon. As for indoor maintenance, in addition to maintaining ventilation, fish pond water was sprayed 3 to 4 times a day to maintain a certain humidity.
2. Prevent disease Every other week or two should be mixed with appropriate amount of sulfa drugs and antibiotics in the feed. It is also possible to soak the feed in the liquid and feed it together with a small amount of residual liquid.
1. Cement pool area is 50 square meters to 100 square meters. It can store more than 1.2 meters of water and is convenient for drainage and drainage. Spread 10 to 15 centimeters of fine sand on the bottom of the pool and sterilize it after 10 days of soaking and then use it to build a plastic greenhouse.
2. The area of ​​earthen pond is from 5 mu to 10 mu. It can maintain a water level of over 1.5 meters without leakage. It is convenient for drainage and drainage. The depth of silt does not exceed 15 cm. 10 days before the crab enters the pool, clear the pond with quick lime and fill it with water a week later. The plastic canopy can still be installed as described above.
3. There is no need to build a plastic greenhouse insulation facility in the indoor area, and it is possible to carry out short-term maintenance by directly using empty houses to build smooth, non-leakable concrete floors. The general area is 10 to 30 square meters.
Second, the density of cultivated cement ponds is 1.5 kg to 2 kg per square meter. Before the crabs enter the pool, aquatic animals like water peanuts need to be put in the pond, accounting for 1/3 of the water area, for their habitat and feeding. The earthen pond is 500 to 700 kilograms per mu, and the pond also needs to put in 1/3 to 2/5 of the aquatic plants occupying the water area, so that the crab can safely avoid the enemy and feed. The room is 3kg to 5kg per square meter.
Third, bait feeding in the winter greenhouses using plastic greenhouses, can keep the temperature of the greenhouse in the greenhouse most of the water temperature above 15 °C, to ensure normal growth of crabs in the appropriate water temperature. In the previous stage of feeding, bait should be dominated by plant foods. Such as soaked or cooked wheat, soybeans, sweet potatoes, vegetables and so on. Each day, the amount of feeding is about 5% to 8% of the crab weight. It is fed once a day in the afternoon and then in the afternoon. It is fed from 10 a.m. to 11 a.m., and the feed is fed 30%, and it is fed from 4 to 5 p.m. 70%. In the latter stage of feeding, the animal protein content in the food should be appropriately increased, and small fish, shrimp, snail meat, and compound feed can be fed in an appropriate amount.
Fourth, daily management
1. Management of greenhouses In order to maintain the water temperature, it is necessary to pay attention to the sealing of the plastic film and the poolside. Do not open the greenhouse door for a long time or open the door frequently. If the agricultural film is damaged, repair it in time. Depending on the water quality, the water in the pool will be changed from 1/5 to 1/3 every 1 to 3 days when the weather is warm in the afternoon. As for indoor maintenance, in addition to maintaining ventilation, fish pond water was sprayed 3 to 4 times a day to maintain a certain humidity.
2. Prevent disease Every other week or two should be mixed with appropriate amount of sulfa drugs and antibiotics in the feed. It is also possible to soak the feed in the liquid and feed it together with a small amount of residual liquid.
Digital Sensor And X-Ray Units
Digital Sensor And X-Ray Units,Dental Radiographic Device,Dental Radiographic Equipment,Dental Radiography Device
Rolence Enterprise Inc. , https://www.rolencedent.com