Ampoules are developed for sensitive medication for only contacting with glass. Zhengli provides neutral glass, easy break and smooth cut ampoules manufactured by most advanced equipment. Ampoule is good for sensitive drugs. Based on stringent process and quality control, Zhengli ampoules features easy break and smooth cut surface. All Zhengli ampoules are manufactured and packed consistent with ISO 9001 and ISO 15378 standard.
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First, to ensure adequate supply of aquatic plants: Summer crab ponds should be stocked with water peanuts, duckweed, reeds, white water and other aquatic plants, where conditions can be used bricks, tiles and other piled artificial crab nests, to provide a cool shark inhabit surroundings. In addition, there must be a large supply of young weeds, such as Hydrilla verticillata and Arthrobacter spp., in order to feed the crabs and avoid predators. The plants used for shading should not cover the entire surface of the pool, and there should be about 1/3 of the area of ​​the pool. Thoroughly remove the filthy weeds so as not to spoil the water and breed germs.
Second, to ensure the quality of clean water and nutrition: crab pool should always check the water quality, timely removal of leftovers and dirt, keep the pool water clean, water depth to maintain more than 1 meter. Change the water frequently and change the water selection in the evening. Change the water every time to leave at least 1/3 of the original pool water as the bottom water. When the temperature is high, the water exchange interval should be appropriately shortened. Normally, the water should be changed every 3 to 5 days. The water source must be hygienically clean and non-polluting.
Crab raising also requires that the water contains a certain amount of inorganic salts to promote crab growth and clam shells. Therefore, after changing the water, the inorganic salts in the water can be supplemented according to the conditions. The crab oysters. During the shell, in particular to increase the content of calcium ions, generally 5 to 10 kg of lime per acre of water after the Quanchiposa, you can also put a small amount of other inorganic salts.
Third, pay attention to the feeding of food: high temperature should be appropriate to increase the feeding of plant foods to reduce the feeding of animal feed. Wheat, squash, and cakes are all vegetable feeds that crabs love to eat. When feeding, these feeds should be made into lumps and put on the table to feed the crabs. In this way, it is beneficial to observation without damaging water quality. The amount of feeding should be increased or decreased according to the water temperature of the day and the feeding situation of the crabs on the previous day. It is generally 10% of the total weight of the crabs, and it is advisable to have a slight surplus after feeding for 2 hours. Feeding time should be carried out every day from 4 to 5 pm to adapt to the crab's nocturnal habits.
Fourth, do a good job of anti-escape, prevention and disease prevention work: adhere to the daily tour of the pond, through the tour pond, to understand the crab feeding conditions, anti-escape facilities and predators situation. If crabs escape, replace the damaged anti-escape facilities in time. Timely capture predators in the crab pond. Artificially cultivated river crabs have many diseases, and they must do a good job of preventing diseases. They can use bleaching powders and other drugs to prevent and treat them from time to time. The occurrence of diseased crabs and dead crabs should be immediately investigated and the cause must be resolved.
Summer crab management measures
In summer, the weather is hot and the water temperature is relatively high. In order to ensure the river crabs to cross the river safely and improve the survival rate, the following measures must be taken: