In 2007, the crayfish ponds were bred in Heqiao Town, Luan County, and the aquaculture area was 80 mu. A total of 31,807 kilograms of crayfish with an average size of 27 fishes per kilogram was produced, with an average yield of 397.6 kilograms and a maximum yield of 551 kilograms per mu. The pond preparation pond is suitable for 8-10 mu. It requires sufficient water source, convenient drainage and drainage, water depth of 1.5 meters, flat bottom and less silt. Clear water 10 cm forward, per acre 100 kg of lime slurry Quanchiposa, 10 days into the water 30 cm. Before the stocking of shrimps, aquatic plants such as Hydrilla verticillata, Elodea and aquatic flowers are planted. The area covered by aquatic plants accounts for 40%-60% of the pond area. After planting good aquatic plants, 15 kg of phosphate fertilizer or 150-200 kg of organic fertilizer is applied per acre. The seedlings require that the shrimps be robust in structure, complete with appendages, and disease-free without injury. The shrimps stocked in the same pond must have the same specifications. They are generally stocked in December or March of the following year and stocked with 100-200 tails per acre. / kg of crayfish fry 50 kg. Feed feeding uses plant feeds and animal feeds for feeding. The plant feeds fed mainly include corn, wheat, bran, hawthorn and pumpkin. The animal feeds fed mainly include pig blood, fish intestine and small trash fish. The daily feeding amount of crayfish accounts for 6%-7% of the total weight of shrimp in ponds and is fed twice a day. Day-to-day management Water transparency is kept at 25-30 cm, fresh water is added every 5 days in the breeding period, water is changed once a week in the high-temperature period from July to August, and the water depth is 1.2-1.5 meters per month. Kilo quicklime 1 times to promote growth and peeling of juvenile shrimp. Each morning, evening and midnight, the pool was observed once and the eating and growth of crayfish were observed. Disease prevention and control adhere to the principle of "prevention first and prevention greater than governance". In addition to routine use of quicklime for disinfection, ponds should regularly use microbiological agents according to water quality and crayfish activities to create a good environment and maintain normal growth of crayfish. Fishing listing Around June, crayfish can be caught timely according to market demand and growth specifications.
All water based products have plenty of nutrients and water to support microbe growth under favorable conditions. Microbes invade water based products from multi-point sources, such as contaminated raw materials, poor plant hygiene, untreated water, and not properly preserved recycling materials. While adding in-can preservatives into the products should not excuse a factory from Good Manufacturing Hygiene Practices (GMHP), proper use of in-can preservatives coupled with GMHP can dramatically minimize the chance of microbial tolerance development, and assure unspoiled products to customers.
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