1. Water source: No pollution, rich dissolved oxygen, convenient drainage and irrigation. The water of rivers, lakes and reservoirs can be used as a water source. Well water and spring water can also be used as water sources as long as they do not contain harmful substances.
2, shrimp pond size: preferably rectangular. It is advisable to use shrimp with a mixed pond area of ​​2-20 acres. Fish-based ponds with shrimps can be appropriately larger.
3, shrimp pond bottom and water depth: the bottom of the pond is best sand mud bottom. Water depth of 1 to 1.5 meters is better, can plant 30% water surface of aquatic plants.
4, clear pond: available bran, lime, bleaching pond clear pond (the same way as the fish pond). 2 to 3 days later, organic fertilizer was used to cultivate water quality. Until the emergence of zooplankton can be put shrimp seedlings. Ponds with more miscellaneous fish that are difficult to remove can be sprayed with sodium pentachlorophenol (2 kg/mu) in the whole pool. The water level in the pool is 0.5 meters. After 2 days, the pond is drained.
Second, put the seedlings
1 shrimp feeding season: When the water temperature is stable above 20°C, seedlings can be considered. It is generally necessary to ensure that there are 4 to 5 months of rearing period, as early as possible when the water temperature conditions allow.
2, seedling density: the survival rate of commercial shrimp is about 30 to 80%, if the plan to produce 105 kilograms of shrimp per mu, the specifications in 20 grams / only, general Mu 2 to 30,000. The growth time is shorter and less suitable.
3. Notes: (1) The inspection water is non-toxic and the zooplankton is cultivated to a medium level; (2) No matter what kind of aquaculture mode, the fish species must be put in after about 1 month of the shrimp pond; (3) more Point to put, to facilitate the distribution of shrimp; (4) select the water temperature balance of weather. (5) Ten days before the shrimps were released, plankton, chicken manure and other fertilizers should be used to cultivate plankton in ponds after clear ponds in order to improve the survival rate of shrimps and speed up the growth of young shrimps. Use 60-mesh sieve filter when entering and draining to prevent wild fish from mixing. Plant aquatic plants to improve the water environment. On high temperatures, 10 cm of water should be poured every night.
Third, feed and feeding methods
1, feed: rice bran, wheat bran, bean cake, peanut cake, livestock manure, slaughtered leftovers, fish meal, small trash fish, cocoon, snail, pellet feed. Dilution of shrimp seedlings to about 2 cm of juvenile shrimp is dominated by zooplankton and organic debris, and feeds should be ground into fine particles. Longer than 3 cm in length can be fed pellet feeds 0.2 to 0.4 cm in diameter and 0.4 to 0.6 cm in length.
2. Feeding method and quantity: The first month after the shrimps are fed, the fish should be fed with fish sauce, soybean paste, wheat bran, and peanut cake. Soybean meal and peanut cake 1 to 2 kilograms per mu water surface, animal feed properly reduced. The food organisms in the water are not enough, and chickens and duck eggs can be cooked into very fine particles and splashed along the pond. Each day, it has 0.5 to 1 kilograms per mu. When the body length is more than 3 cm, granular bait can be cast and gradually increase the particle size. After feeding, check whether you have eaten before the next feeding, and increase or decrease according to the feeding situation. Macrobrachium rosenbergii has the habit of foraging in the evening, and it accounts for a total amount of 3/day during the day, 2/3 in the evening and night, and 4 projections per day.
Fourth, daily management
1. Check the ponds on a daily basis and check the drains to prevent the escape of shrimps and wild fish. Observe the color of the shrimp to prevent floating heads. Check the food intake. In the summer, pay special attention to the night-watching pond.
2, the water pH is about 7, dissolved oxygen is maintained at 4 milligrams or more, transparency is about 25 centimeters, summer or rainy and humid weather should be promptly opened aerator.
3. Body length and body weight were measured every two weeks. The growth status was checked. The shells were thick and dark in color, indicating that the growth was not good. The animal protein diet was added and new water was added.
Fifth, catch a large number of fishing with a net catch, mesh 2 cm, listed in batches can also be used net catch, can also be copied along the side of the net copy. In addition, cage traps can also be used. The temperature of the pool water should not be lower than 18°C ​​when catching, otherwise it can easily cause losses.
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