In recent years, crayfish breeding has taken off in Tangdian Town, Xinyi City. Some farmers have explored some breeding experiences during the breeding process for many years and have also achieved good economic benefits. The current situation of Gao Zhijun crayfish farming in Tangdian Town in 2011 is described as follows: Tongkou condition The pond is well-watered and meets the national pollution-free water quality standard. The pond area is 10 mu. The bottom of the pond is about 20 cm deep and the water depth is 60 to 100 cm. In the pool there is a set of shrimp ditch or pits, and anti-escape facilities are made around the pond using crab crab escape films. Qingtang disinfection before April 2 drained pool water, exposure to the bottom of the pool about 15 days, and then use 75 to 120 kg of lime slurry per acre after the whole pool evenly spilled, completely kill the pool of wild fish and other predators. Microporous aeration set with a 0.22 kilowatt air pump per acre, laying a microporous rubber pipe with a 10 micron aperture at a distance of 20 cm from the bottom of the pool, with a pipe spacing of 8 meters plus a rigid plastic tube with an aperture of 75 microns. The air pump vents are connected to the microporous rubber tube. One week after infusing fertilized lime into ponds, the ponds were filled with 60-70 cm of water, and when they were flooded, they were filtered with 40-60 mesh nets to prevent wild fish and fish Eggs from entering the pond and affecting the growth of crayfish. Grass seedlings are planted with water peanuts, Elodea and other aquatic plants at a distance of 1 m from the shore, and emergent plants and floating plants are planted in a reasonable manner. The planting area accounts for 30% of the shrimp pond area, and a certain number of willow roots are properly stacked in the middle of the pond to provide shelter for shrimp. In early April, 40 kg of snails were placed per acre, creating a good pond ecological environment. Seed rearing on April 10, 80 to 120 tails/kg of shrimp were purchased, and 65 kg per acre was placed. The seedlings required a robust body, agile activities, and complete appendages. Before stocking, soaking with 2% to 3% of salt water for 3 to 5 minutes, dispersive stocking, to avoid accumulation, the temperature difference between the shrimp before and after entering the pool does not exceed 2 °C. The feed is mainly fed with small mixed fish and frozen seafood junk fish, snail meat, bean dregs, bean cake, barley, water grass and other feeds, supplemented with shrimp feed. It is required that the feed protein should be about 30%, and the daily feed amount should account for 40% to 60% of the total weight of the pond shrimp, and the amount of feed should be reduced by half on cloudy and rainy days, and should be fed in small amounts when there is continuous rain or low air pressure. Feeding twice a day, the amount of feed in the morning accounted for 30% of the daily feed, and 70% in the evening, feeding around the pond. The fodder was cast in the deep water area in the morning and was cast in the shallows at night. There were 2 active food stalls in the pool. Check the diet and growth of crayfish regularly, and check every 10 days. Measure the crayfish's size and weight and estimate the total weight of the crayfish in the pool. Calculate a reasonable amount of daily feed. Water quality adjustment According to the principle of “Spring, Summer, and Full-Summerâ€, the spring water level of 0.6 to 1 meter is beneficial to the crayfish clam shell, water injection is performed every 15 to 20 days in summer, and the water depth is controlled at 1.5 meters, which is conducive to the safe passage of crayfish. Hot season. In addition, every 10 months, per acre surface lime 10 kg of lime disinfected once, adjust the pH of the water to 7.5 ~ 8.5, regular use of microbial agents to improve the pond water quality and sediment quality. Routine management Every morning and afternoon, one or more patrol ponds are regularly added and replaced with fresh water. For diseases, the principle of "prevention from prevention and prevention from combination" is adhered to, and biological regulation and scientific application are used. Encountered the aerator in the hot weather, and opened the aerator at midnight during the high temperature season until 9 o'clock the next day to ensure the dissolved oxygen in the water in the pool. The catch began in June according to the market conditions and the growth of crayfish catching large and small, a total of 20 to 30 fish / kg of commercial shrimp caught 2,696 kg, an average profit of 5127 yuan per acre. Vc Enzyme Whitening Moisturizing Hand Cream
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