1, crayfish farm site requires sufficient water, easy drainage and irrigation and flood and drought resistance. Soil pH is neutral to slightly alkaline, and sunny, long hours of light, conducive to the propagation of plankton, especially with the wind to the sun is good. In order to ensure that crayfish products to meet the requirements of pollution-free, the farm site must be far away from industrial, agricultural and domestic sources of pollution, the environment in line with pollution-free farming standards.
2, reinforced high ridge, digging shrimp ditch, shrimp pit. In order to prevent crayfish digging holes in the ridge will be pierced, triggering the collapse of the ridge; in the flood season after heavy rains are prone to escape from the field shrimp, so you need to raise, widen and tamp the ridge. Reinforcement of the ridge should be 40 to 50 centimeters above the water surface, the base of the ridge widened to 80 to 100 centimeters. Ridges around the window screen mesh or calcium-plastic board to build anti-escape wall, 70 to 80 cm above the ridge surface. Every 1.5 meters with wooden stakes or bamboo poles to support the fixed. Inside the upper part of the mesh is sewn on the width of 30 centimeters or so of agricultural film, the formation of "upside down beard" to prevent crayfish climbing, holes to escape. Shrimp pit dug along the ridge around the field, to create a good living environment for crayfish and facilitate the concentration of shrimp. Shrimp pit about 1 meter deep, about 1 meter wide.
3, fertilization and disinfection. Should be based on fertilizer, preferably organic fertilizer. The use of organic fertilizer 150 to 200 kg per acre of organic fertilizer. 10 to 15 days before stocking shrimp seedlings, to shrimp ditch and shrimp pit disinfection. Use lime 100 ~ 150 kg per mu, water splashing.
4, shrimp seed stocking. There are two ways of stocking: one is to put into the parent shrimp to let their own reproduction, time is generally at the end of August to mid-October. Stocking specifications for each acre of 20 to 30 per kilogram of crayfish about 20 kilograms. Another is the spring stocking of young shrimp. Per acre to put specifications for each kg of 250 to 600 tails of crayfish juvenile shrimp 2.5 to 4.5 million tails. Stocking should be shrimp disinfection, you can use a concentration of about 30% salt solution bath shrimp species 3 to 5 minutes.
5, crawfish feed feeding. Crayfish feed rice bran, soybean cake, bran, miscellaneous fish, snails and mussels, silkworm pupae, earthworms, slaughterhouse scraps or with feed. Feeding amount to the amount of natural bait in the lotus root field with the stocking density of crayfish. Feeding throughout the season, to comply with the "early food, the beginning of less, more in the middle, less in the late" principle. 6 ~ September water temperature is suitable, is the crayfish growth period, generally feeding 2 to 3 times a day, time in the morning 9 ~ 10 and sunset or around the clock or at night, the daily feeding amount of shrimp body weight of 5% to 8%, the rest of the season can be fed every day! 1 time a day in the rest of the season, before and after sunset, the daily feeding amount of 1% to 3% of the body weight of the shrimp. Bait should be cast near the shrimp ditch shrimp ponds, shallow water and crayfish concentrated section, in order to facilitate its feeding and check the eating situation.
6, disease control. High-temperature season every 15 to 20 days using quicklime splash disinfection 1 time, each time l0 to 15 kg per mu, add a certain amount of allicin, compound vitamins and other drugs in the feed, generally can be controlled without disease.
7, fishing. Crayfish fishing is mainly used cage net catching, fishing can be year-round, catching big to stay small, the main fishing period from April to September. If each catch is very small, you can stop fishing.
8, the first time a novice engaged in crayfish farming, need to pay attention to the following points: a full understanding of the basic knowledge of crayfish, a proper understanding of the local lobster market, to put an end to blindness.
9, a small amount of investment in the initial period, in order to accumulate experience, more learning, more exchanges, a solid grasp of crayfish farming skills.
10, focusing on the selection of crayfish fry, crayfish fry is related to the success of farming.
11, rational planning and design of breeding ponds, do a good job of ridge, temporary ditch, drainage and anti-escape facilities.
12, pay attention to crayfish aquaculture pond planting and management, water quality, water level management.
13, crayfish daily management is crucial, the need for adequate day-to-day management, do a good job of disease prevention and management of aquaculture ponds.