In the 15 to 20 days prior to the release of crab seedlings, 75 kg of lime are used for sprinkling and disinfecting per acre. After the disappearance of the medicinal property, 80 mesh filters are used to infuse water, cultivate basic baits, transplant aquatic plants, and set up necessary anti-escape facilities. When the crabs go into the pool, they may be lighter. Feeding bait 2 to 3 times a day should be invested in shallow areas in the surrounding area, and pay attention to weather, water sanitation, individual growth, and the number of bait creatures.
(b) Crab farming
1. The pond has sufficient water sources, convenient water inlet and drainage, good water quality, good ventilation, and the pond area should not be too small. The water depth of the pond is maintained at about 0.6 to 1.5 meters all year round. The water depth varies from place to place. The shallowest point is 10 centimeters. Several mounds can be built in the pool that are slightly higher than the surface of the water. The island can be transplanted with aquatic plants. The pond slope ratio is generally 1 : 1.5 or less.
2. Water temperature control The crabs should be kept as far as possible and the temperature difference should be reduced. The temperature difference between the seedlings should be less than 2°C, and the temperature difference between the adults should be less than 5°C. The area required for planting aquatic plants in crab ponds accounts for 1/3 to 1/2 of the total pond area, in order to facilitate the control of the water body temperature and prevent crabs from becoming precocious. The new water should not be filled too quickly or too quickly. The temperature difference should not exceed 3°C.
3. The level of natural production of transplanted grass crabs mainly depends on the number of aquatic grasses and benthic organisms (food organisms) in the waters. For pond culture crabs, we must make great efforts to plant good plants and pay attention to disinfection and prevention during transplantation.
4. Anti-escape facilities Anti-escape facilities use plastic films and cement boards, depending on the situation.
5. The disinfection of clear ponds is generally disinfected with quicklime clear pond before release, with a dosage of 75 kg per mu. After receiving water, it is necessary to timely apply fertilizer to cultivate algae and basic bait. The transparency is generally kept at 40-50 cm.
6. Seedlings bought back from the field can not be directly put into the pool, should be soaked in water for 2 to 3 minutes, remove the home for 10 minutes, so repeat 2 to 3 times, until the young crab gradually absorb enough water and adapt After the water temperature is put into the pool, the survival rate can be improved. Density can be controlled within 1500/mu, standard size 120 ~ 150 kg / kg of crab.
7. Daily management The entire process of pond intensive culture mainly depends on manual feeding of feed. Therefore, the type, quality, and inferiority of feed have a great influence on the growth and development of crabs. When feeding, they should adhere to refined, green, and coarse The principle is that animal concentrates account for 40%, aquatic grasses account for 35%, and other plant feeds account for 25%. The method of feeding the crabs is to “see four sets of fourâ€, that is, to see the season, see the weather, see the water quality, see the activities of the crabs, timing, fixed-point, qualitative, quantitative.
Medical Consumables and Accessories
Medical Consumables and accessories
1. Made from 100% cotton absorbent gauze. Folded edges or Unfolded edges. 2. White, dyed green, green, dark blue color are available. 3. Yarn usually is 40S, but 32S is also available 4. Mesh can be 12x8, 18x11, 19x15, 20x12, 24x20, 26x18, 30x20, etc. 5. The sizes can be 5x5cm, 7.5x7.5cm, 10x10cm, 10x20cm, 20x20cm, etc. 6. It can be 8ply, 12ply, 16ply, 32ply, etc. 7. Sterile or Non sterile. Steriled by EO or Gamma. 8. With X-ray detectable or without 9. High soft, absorbency, poison free and could do isolating or absorbing, washing protecting function in surgical operation. strictly confirming to BP,EUP, USP. 10. Passed CE Certificate, ISO 13485, etc. 11. For disposable use before sterilization and its expiry time is 5 years.
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