Combined with the specific breeding conditions, shrimp size, water depth, water-carrying capacity, water change conditions, it is appropriate to stock 30,000 to 40,000 shrimp per mu. I. Breeding facilities pond area of 4-10 acres, depth 1-1.5 meters, slope ratio 1:2.5. pond bottom flat, bottom loam, pond slope hard, pond water retention is good, water level is easy to control. The water source is sufficient and the water quality is not polluted. In accordance with the pattern of high irrigation and low drainage, the construction of inlet and outlet channels, so that irrigation can go in and drainage can go out. Crayfish have a strong ability to escape, and need to build anti-escape facilities. Usually with plastic film or calcium-plastic boards, with bamboo stakes or wooden stakes around the pond ridge to support, to prevent escape. II. Preparation before stocking 1. Thoroughly clean and disinfect the pond. Stocking shrimp seedlings before 20 ~ 30 days, drain the pond, remove excess sludge, repair the pond ridge, 75 kilograms of quicklime per mu or bleaching powder, bleaching powder essence and other drugs for thorough cleaning and disinfection of the pond.2. Apply sufficient basal fertilizer, 500 to 600 kilograms of decomposed animal and poultry manure per acre, cultivate rotifers, branching horns and copepods of the plankton, shrimp seedlings to provide palatable bait.3. Planting of aquatic plants. Planting rotifers, Malayan eyelet, Iole algae and other aquatic plants, accounting for 2/3 of the area of the shrimp pond. at the same time, set up nets, or set up bamboo tubes, plastic tubes, etc.. Provide crayfish with a place to live, molt and hide. Third, stocking shrimp fry and shrimp species 1. A variety of breeding modes can be used. (1) summer stocking mode. Stocking the first batch of young shrimp hatched that year is mainly. Stocking time in mid- to late July, juvenile shrimp specifications above 0.8 cm. Stocking 3 to 40,000 tails per mu. (2) fall stocking mode. Cultivated in that year, large-size shrimp fry or shrimp seed-based stocking, stocking time from mid-August to September. Shrimp specifications in 1.2cm or so, stocking 25,000 to 30,000 per mu; if the shrimp species specifications of 2.5 to 3cm, then stocking 15 to 20,000 shrimp per mu. Some can reach market specifications by the end of the year, and most of them are caught and marketed in June-July of the following year. Commercial shrimp weighing only 25 grams, mu yield 300-500 kilograms. (3) winter and spring stocking mode. Generally stocked in December or March-April of the following year. The current year does not meet the market specifications of the shrimp to stocking-based, specifications for each kg 100-200, 15000-20000 per mu stocking. after the winter and spring seasons of breeding, June-July commercial shrimp can only weigh 30 grams, mu yield 400-500 kg. 2. the quality of shrimp fry shrimp fry quality requirements are: (1) neat specifications. Juvenile shrimp size of 0.8 cm or more, shrimp species size of about 3 cm. The same pond stocked shrimp fry and shrimp species specifications to be consistent, and to be all stocked at once. (2) Robust, complete appendages, no disease or injury, and strong vitality. (3) Shrimp fry and shrimp seeds are artificially cultivated. If it is a wild shrimp species, it should be domesticated for a period of time before stocking, so as to avoid fighting and killing each other.3. Precautions:(1) Stocking should be carried out in sunny mornings in winter, and in the summer and fall seasons in sunny mornings or rainy days to avoid sun exposure. (2)Before stocking shrimp seeds, wash them with 3%~5% salt water bath for 10 minutes to kill parasites and pathogenic bacteria. (3) Shrimp seeds purchased from abroad should be slightly treated before stocking because they are away from water for a long time. Soak the shrimp in the pool water for 1 minute, lift it up for 2-3 minutes, soak it again for 1 minute, and so on for 2-3 times, so that the surface of the shrimp and the gill cavities absorb enough water before stocking, to improve the survival rate. (4) in the pond to raise crayfish, appropriate mixing of some silver and bighead carp, improve water quality, make full use of bait resources. Fourth, scientific feeding crayfish is omnivorous and gluttonous. Feed, grasp the following three points.1. According to the nutritional requirements of crayfish at the same stage of growth, do a good job of feed matching and feeding. Crayfish larvae and juvenile stage to rotifers, branchiopods, copepods, aquatic insect larvae, etc. for food. , while the adult stage also feed on animal feed and plant feed. After stocking shrimp shrimp, to fertilize the water quality in a timely manner. 8-10 months crayfish rapid growth period, to feed more bran, soybean cake, green fodder, appropriate feed animal feed. 1-12 months, crayfish overwintering before the animal feed feeding. 2. according to the crayfish's habits and feeding characteristics of the feeding. Crayfish crayfish mostly foraging at night, there is competition for food and gluttony habits. Every morning and evening feed once a day, mainly in the afternoon, accounting for 70% of the feed throughout the day; take the quality, quantity, timing feeding method, full, even feeding, to ensure that each shrimp are full, to avoid competition for food. 3, according to the weather, water quality changes and shrimp activity feeding situation reasonable baiting. Crayfish growth of suitable water temperature of 20 ~ 32 ℃. From August to October, crayfish have a large amount of food. Daily feeding can be arranged according to the shrimp body weight of 6% to 10% in the pool, the overall dry or with the material for 2% to 4%, and according to the weather, water quality and shrimp feeding situation appropriate increase or decrease. Continuous rainy weather or water quality is too thick, you can feed less, and feed more when the weather is good; a large number of shrimp in the moult to feed less, after the moult to feed more; shrimp in the onset of the season to feed less, and normal growth to feed more. Getting shrimp to eat well reduces waste and improves feed utilization. Verb (abbreviation of verb) daily management 1. Establish a traveling inspection system. Patrol the pool every day and take timely countermeasures when abnormalities are found.2. Regulate water quality. Keep the dissolved oxygen in the shrimp pool above 5g/L, pH 7~8.5, and transparency about 40cm. Every 15~20 days to change the water, each time to change 1/3 of the water. Spread lime water every 20 days, each time 10 kilograms of lime per mu. Keep the water level stable, do not fluctuate. 3. Strengthen the management of the habitat and moulting place. There are always more aquatic plants in the shrimp pond. When the shrimp molt in large quantities, interference is strictly prohibited. Add high-quality palatable feed immediately after molting to prevent mutual killing and promote growth.4. Escape and disease prevention. Strengthen flood inspections to prevent shrimp escape. Do a good job of disease control and enemy elimination. intransitive verb commercial shrimp fishing and transportation 1. fishing. June-July and November-December can be concentrated fishing. They are first caught in cage nets, hand nets and other tools, and then in dry pools. Fish of all sizes can also be caught, all year round.2. Transportation. Shrimp are usually transported in Styrofoam boxes, plastic bags or refrigerated trucks. Keep the shrimp moist during transportation, do not squeeze, to improve the survival rate of transportation.