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Talking about the efficient breeding of pond fish shrimps and crabs
The Feicaibao of Zhouzhuang Town, Xinghua City, uses 30 acres of ponds to carry out polyculture of squid, squid, crayfish, and crabs. The net profit is 3098 yuan. Now his breeding experience is introduced as follows. The pond clears and disinfects and drains the pool water in winter, removes excess silt, reinforces the pond, and freezes the sun for 1 month. At the end of January, 100 kilograms of quicklime in the end of each month clears the pool to destroy the predators and wild animals in the pond. Fish and pathogens. Construction of anti-escape facilities A 50 cm high plastic sheet is placed around the pond as a fence, and the bottom is buried in the soil 20 cm. In addition, 60 mesh mesh filter at the inlet and outlet can prevent wild fish and eggs from entering the shrimp pond and crayfish to escape. Influent fertilization In February 20th, 50 cm of water was poured, 200 kg of fermented organic fertilizer was applied per acre to cultivate natural feed. Transplanting plants to transplant Elodea, Vallisneria, etc., so that it covers an area of ​​about 30% of the total pond area. When the seedlings are not planted during the early stage of planting, they are tied with terrestrial plants and placed around the pond. Usually 1.5 meters away from the pool, put a bundle of grass every 3 to 5 meters for shrimps and crabs to inhabit. Putting a snail on the water surface of about 150 kg per acre will not only purify the water, but also the shell of the snail is very fragile and nutritious. It is very easy to feed shrimps and crabs, which will help improve the survival rate and growth rate of shrimps and crabs. In mid-February, the seedlings will be reared at about 30 centimeters per mu on about 30 centimeters of carp seedlings in mid-February; in late March, 420 will be placed on 140-160/kg of crab seedlings per mu; at the end of April, 300~ 400/kg crayfish seedlings 4000; In late June, 6 seedlings of 5 to 7 cm body length were fed per acre. The feed is mainly fed with compound feed, and is fed with minced fish, slaughterhouse waste, rice bran, and bean cake. When the weather is fine, cast more, high temperature hot, continuous rainy days or less water when the water quality is too heavy, cast less shells, cast more after the shell. Water quality management timely fertilizer, regular exchange of new water, hot water every 5 to 7 days in the hot water, 1 time, usually 15 to 20 days, changing the water once to maintain the pool water pH 7.5 to 8.2, dissolved oxygen 5 mg / liter or more . During the hot season, the rotted part of Elodea was cut off in time and a small amount of sterilized water peanuts was transplanted. Disease prevention and control regularly sterilize the water body. Every 15 days, 10 to 15 kilograms of quicklime is used to sprinkling Quanhua. Regular sprinkling of EM bacteria, splashed once every 7 to 10 days in the hot season, and once every 15 to 20 days. The bait is fed once every 20-30 days, mainly using Chinese herbal medicine and immunopotentiator. Crawfish specifications can reach 20-30 g/cap, and they can be caught and put on the market. They are generally caught in the ground cage, and when crawling, their habit of crawling against the water in the crayfish is appropriate. Micro stream water stimulation can increase the crawfish catch rate. Listed before the Mid-Autumn Festival.