Select good water quality, sufficient water, no pollution sources around, strong water retention capacity, convenient drainage and irrigation, not subject to flooding of the field for paddy shrimp, the area of less than a few acres, more than dozens of acres or hundreds of acres are available. Along the inside of the paddy ridge around to excavate shrimp ditch, ditch width 1.5 meters, 1 meter deep, the field area is larger, but also in the middle of the field to excavate field ditch, field ditch width of 1 meter, 0.5 meters deep, shrimp ditch and field ditch area of about 20% of the total area of paddy fields. The use of excavation of shrimp ditch dug out of the soil reinforcement to heighten the ridge, leveling the field, ridge reinforcement of each layer of soil should be tamped, to prevent the next big storm when the ridge collapsed. The width of the ridge is more than 3 meters, and the height of the ridge is 1 meter. Inlet and outlet to be surrounded by wire mesh or fencing to prevent crayfish escape and enemy entry. Water intake channel built on the ridge, the drainage outlet built in the lowest part of the shrimp ditch, according to the pattern of high irrigation and low drainage, to ensure that irrigation, drainage. In 1 meter from the ridge, every 3 meters to play a 1.5 meters high pile, set up with moso bamboo, in the ridge side of the planting of melon, beans, gourds, etc., to be after the vine on the shelves, in the hot summer to play a role in the shade to avoid the summer heat. In the shrimp ditch and field to transplant water plants, such as bitter grass, rotunda black algae, goldfish algae and other submerged plants, water plant cover to 30% is appropriate, and to sporadic, scattered as well, which is conducive to the shrimp ditch water flow unobstructed plug. Field around the plastic film, cement board, asbestos tiles or calcium-plastic board to build a wall to prevent the escape of crayfish.

Two, shrimp fry shrimp stocking

Stocking crayfish shrimp fry or shrimp seed to test the water, test the water safety before putting shrimp. Crayfish stocking method has two kinds: one is in the rice harvest in early September after the seed shrimp directly placed in the paddy field, so that their own reproduction, according to the actual situation of paddy farming, generally stocked per mu individual in 40 grams / only more than 20 kilograms of crayfish, male and female sex ratio of 3 : 1. Two is in May after rice planting, put specifications for the juvenile shrimp of 2-4 cm 1500 -2000 tails/mu or 30 kg/mu. Crayfish in the stocking, pay attention to the quality of young shrimp, the same field stocking specifications to be as neat as possible, stocking a full release. Stocking in the morning on a sunny day or rainy day, stocking shrimp with 3% to 4% of the salt water bath for 10 minutes to disinfect, high temperature weather into the seed, seedling to be careful to disinfect, it is best to enter the seedling without the use of salt water bath, into the finished seedling with quicklime 10 kg / mu on the disinfection of the water body.

Three, daily management

Every morning and evening, insist on patrolling the field, observe the ditch water color changes and shrimp activity, feeding, growth. Field management is mainly focused on rice tanning, medication and escape prevention and pest control. Rice tanning field should be lightly baked, can not completely drain the field water. The water level is lowered to the surface of the field can be exposed, and the time should be short, found that the crayfish have abnormal should be, then immediately inject water. Crayfish are very sensitive to many pesticides, rice paddy shrimp farming principle is to be able to not use drugs resolutely do not need to use drugs when the need to use high-efficiency and low-toxicity pesticides and biological agents. Pesticides should pay attention to strictly grasp the safe use of pesticides concentration, to ensure the safety of shrimp, should be and require spraying in the rice foliage, try not to spray into the water, and the best partitioning of drugs. Prevention and control of rice stem borer, mu with 200 ml of 18% insecticide double water with 75 kg of water spray; prevention and control of rice fly, mu with 50 grams of 25% puff puffer wettable powder with 25 kg of water spray; prevention and control of rice streak disease, rice blast, mu with 50% of the fungicide 40 grams of water spray; prevention and control of rice blight, rice curculio, mu with potentiated wellbutrin 250 ml with water spray. Rice application of drugs, should try to avoid the use of insecticides containing bow esters, so as not to cause harm to the crayfish. Spraying water is preferable in the afternoon, because the rice leaves are dry in the afternoon, and most of the liquid is adsorbed on the rice. At the same time, the field before the application of water to 20 centimeters, the spraying of water in a timely manner after the water change.

Four, feeding management

Rice farming crayfish base fertilizer should be enough, should be based on the use of rotted organic fertilizer, before transplanting rice seedlings into the arable layer at a time, to achieve the enduring long-lasting fertilizer. Fertilizer is generally once a month, urea 5 kg / mu, compound fertilizer 10 kg / mu, or the application of organic fertilizer. Prohibit the use of chemical fertilizers harmful to crayfish such as ammonia and ammonium bicarbonate. Application of fertilizer, it is best to first drain shallow field water, so that shrimp concentrated in the ring ditch, field ditch, and then apply fertilizer, so that fertilizer is rapidly deposited in the bottom layer of field mud, and for the mud and rice absorption, and then deepen the field water to a normal depth.

Paddy shrimp generally do not require feeding, in the peak season of crayfish can be appropriate to feed some animal feed, such as hammering snails, mussels and slaughterhouse scraps, etc. August to September to feed plant-based feed, October to December to feed more animal feed. Daily feeding according to the shrimp body weight of 6% to 8% arrangement. Winter feeding every 3 to 5 days, daily feeding for the field shrimp weight of 2% to 3%. From April of the following year, gradually increase the feeding rate. Water quality management August to September high temperature season, every 10 days to change the water, each time to change the water 1 / 3; every 20 days to splash 1 lime water to regulate water quality. Daily management inspect the field once a day. Do a good job of flood prevention and escape prevention. Maintain a large number of aquatic plants in the shrimp ditch, the number is insufficient to replenish in a timely manner. Do not flush when a large number of shrimp molt, do not interfere, and feed more high-quality animal feed after molt.