I. Construction of Dianchi Lake
1. Infants who are younger than 10 grams of age are said to be young. The pool area is 2 square meters to 8 square meters, rectangular, 0.3 meters to 0.4 meters deep. The water depth is maintained at 0.1m to 0.15m. The bottom of the pool is paved with fine sand. The shade cover of the pool is 1 to 1.5 meters above the pool top. Both ends need to build a rest table about 20 cm wide. A 30 ramp is built at the intersection of the lounge and the water surface to allow it to go up and down.
2. Baby larvae weighing about 10 grams to 100 grams. The pool area is 20 to 200 square meters, the pool depth is 0.6 to 0.8 meters, the water depth is maintained at 0.3 to 0.4 meters, and the bottom of the pool is 8 to 10 centimeters long. There are rest platforms at both ends of the pool.
3. The weight of 100 grams or more into a quaternary pond is called é³–. The area is 30 to 300 square meters. Since individuals ranging from 100 g to 1500 g or heavier are crickets, several pools should be built and kept separately according to size. The depth of the pool is about 1.5 meters, the water depth is between 0.8 meters and 1.2 meters, and the bottom of the pool is 5 centimeters thick sand.
4. Intimate pool area of ​​50 square meters to 300 square meters, pool depth of 1.6 meters, water depth to maintain about 1.2 meters. At the bottom of the pool, 25 cm of fine sand is laid. There is a spawning ground on one side or around the pool, which accounts for about a quarter of the pool area. It is 20 cm above the surface of the water. The fine sand in the field is about 35 centimeters. Trails. The pool must be sturdy to prevent escape and leak.
Second, choose to plant
Any species that are caught, introduced or collected should be physically and physically free from injury. In the spring and summer, juveniles are stocked with 20 to 40 animals per square metre, and 75 to 100 in the winter. In spring and summer, young cubs stock 10 to 15 animals per square meter, and 75 to 100 rabbits in winter. Chengyu spring and summer stocking 2 to 3 per square meter, and 3 to 5 in winter.
Third, management
The water in the pool is, in principle, slightly shallower in spring and autumn and deeper in summer and winter. When the water temperature is above 28°C, it needs to be replaced and deepened every day. The water color is light green with a transparency of 40 cm to 50 cm and contains moderate plankton. In the 10 days to 20 days, the juveniles can feed eggs and cooked eggs. After that, the lean meat with fine bones and fine feeds are suspended on the water surface. They are fed once a day in the morning, in the evening and once in the evening. Every day, the amount of feeding is 1% to 10% of its total weight. Juvenile baits are more than juvenile bait. Such as animal organs, cocoons, fish, shrimp, snails, cockroaches, melons and so on. Feed 8% of body weight every day and feed 1 time each morning and evening. Chengyu's feeding amount is 5% to 10% of the total weight.
Care should be taken in feeding: 1. Should not be fed too much fat foods, so as not to spread out the air from grease. 2. The larvae should be removed in time and the pool water should be changed frequently. 3. After entering the winter, you should pay attention to the pool water temperature. Put a plastic shed on the pool to warm the sun. In general, it can be grown into a commercial product within 2 years, which is 2 to 3 years shorter than the natural growth period.
Fourth, the prevention and treatment of rickets
1. swollen neck disease with chloramphenicol or penicillin 150,000 units per kilogram abdominal or intramuscular injection, the amount of 1 ml to 2 ml. Oxytetracycline or sulfa drugs can also be used for feeding, 0.2 g per kilogram, and then halved.
(2) Toxic worm disease should be soaked with 2% to 3% saline for 4 minutes, or soaked in 1ppm bleach solution for a day or night.
3. Hemorrhagic disease can be taken orally with sulfa drugs and antibiotics. For bites, the use of 2ppm to 3ppm bleaching medicated bath.
4. Parasitic disease 20ppm potassium permanganate can be used to wash the carcass.
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