The experience of raising crabs: Crabs are long shells in July and August and are long in October. Summer crabs have frequent activities in the high-temperature season, and their appetite has increased greatly. This is a critical period for the growth of crabs and management must be strengthened. Rationally increase the amount of feed daily. In addition to supplying plant feedstuffs such as peanuts, water lettuce, and Sudangrass, feed them 2 to 3 times a week on animal feedstuffs, such as slaughterhouse waste, miscellaneous fish, cockroach and snails. Meat, etc., or vegetable-rich feeds rich in protein, fat, such as corn, small families, soybeans and so on. The silage feed is best mixed and steamed into blocks for feeding. The amount fed was 10% to 15% of the body weight of the crabs. The feed was put in the shallow water near the pool and fed every day from 3 to 5 pm to adapt to the habit of crab feeding. Avoid Water Pollution During the prosperous period of crabs, it is necessary to ensure that the depth of the pond is about 1 meter, and it is better to be clear, clean, and rich in oxygen. Change the water regularly and change the water every 3 to 4 days. Change the water every time by 10 to 30 centimeters. Changing the water is best carried out before the evening. The water source should be clean, non-toxic and non-polluting. Most of the crabs in the pond were found to have landed and spit, especially during the day when a large number of crabs climbed out of the water, and they were not scared to go into the water or immediately went ashore, indicating that the water was deficient in oxygen or water, and the water should be changed as soon as possible. Should increase. Timely prevention and treatment of diseases in the hot season, crabs easily lead to outbreaks, therefore, we must adhere to the principle of prevention and treatment, supplemented by drugs to prevent diseases. May regularly alternately spill 1 mg/l terramycin powder, 0.5~1 mg/l furazolidone, 1~2 mg/l zinc sulfate, 05 mg/l crab aura and other drugs; regular feeding baits, every 1000g crab Reuse 0.1 to 0.2 grams of oxytetracycline or erythromycin bait feeding; add appropriate amount of shell powder, bone meal, fish meal, poultry eggshell powder in the feed, in order to facilitate crab shelling. Parasitic disease can be used 5 ~ 10 mg / l formalin or other insecticide Quanchiposa, bacterial disease disinfection with water disinfection of the body 2 to 3 times, Quanchiposa drugs and feeding bait combination, the effect Better. To prevent crabs from escaping crabs, it is most likely to run away in summer and early fall. Always check the escape prevention facilities and observe whether there are traces of escape. Check if there is a hole that communicates with the outside river channel and rice fields, and find that the problem is solved in time. The device for blocking the outlet should also be inspected and prevented from occurring.
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Create ecological dehulling environment From July to August, crabs need to undergo the most critical shelling. This shelling takes a long time and often occurs due to the unsuccessful shelling. The water grass is the favorite plant feed for crabs, and it can also provide a shelter and a substrate for living creatures. Therefore, the cultivation of crab ponds should be transplanted as early as possible Elodea, water peanuts, Vallisneria, black leaf algae and other plants, cover rate of about 50%, so that it can provide a cool habitat for crabs, crabs will help escape shelling Predators will prevent soft shell crabs from being attacked by other crabs. Under conditions, the soft shell crabs should be singled out and stored in a ventilated, cool, pool or basin with aquatic plants. After the crab shells are hardened and then kept in the pool, the survival rate of the shelled crabs can be increased.