Second, the release of broodstock. The delivery of broodstock should be carried out in the morning on a sunny day and avoid direct sunlight. After purchasing the broodstock to the poolside, the broodstock must be fully drown before it can be put in. The amount of broodstock to be put in is controlled below 30kg, and the male to female ratio is 1.5:1 to 2:1; The dosage is controlled at about 20 kilograms, and a 5% quantity of males is suitably used to prevent the fertilized eggs from falling off after the egg-bearing shrimps are moved. The released males can be mated again and spawn. On the basis of the previous year's breeding, some prawn were not consciously taken and used as breeding stock for broodstock rearing in the pond. Third, management. After the broodstock is released, it is necessary to strengthen the feeding of animal feed to ensure the nutrient requirements for broodstock breeding. After intensive care for 7-10 days, the broodstock will gradually dig and lay eggs for spawning. Once most of the broods enter the hole, some of the pool water can be drained slowly, and the water depth is controlled at about 60 cm. While strengthening the feeding, we must constantly check the broodstock's egg-holding situation, and be aware of it. We should timely apply fertilizer to cultivate water quality so that the juveniles who leave the mother's body after early reproduction can timely and adequately obtain palatable and nutritious natural foods. . When the broodstock is found to have a lot of eggs or a certain amount of juvenile shrimp, it is necessary to timely catch the male shrimp and the maturing female shrimp to reduce the amount of ponds. The hatching of the fertilized eggs of the oviposition shrimp and the growth of the young shrimp that leave the mother are timely. Provide a good environment. By November, the temperature has gradually decreased, and a large number of broodstock and large-sized juvenile shrimp have gradually entered the hole, and some holes have even been sealed with mud. At this time, the pool water should be gradually deepened until it is added to the lower part of the hole with the freshwater crayfish, and there is a certain water level or relative humidity in the freshwater crayfish cave. When the temperature is high in winter, some freshwater crayfish are still active near the entrance of the hole. They can feed a certain amount of bait for their use. The daily feeding amount can be controlled flexibly according to the conditions of food intake, weather conditions and temperature, and they can be adjusted in time. Usually, the weather is fine and the temperature is high in the afternoon. The feeding site should be selected in the surrounding area (around the middle mound) where there are many caves.
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Freshwater crayfish shrimp breeding pond breeding
First, the preparation of the pond. Before the broodstock is released, the ponds should be cleaned and maintained, and excess silt should be removed. Facilities for escape prevention should be built. The weeds around the ponds do not have to be removed, which is beneficial to the burrowing, mating and spawning of broodstock. At the same time, necessary clearing, disinfection, and killing of predator organisms and disease sources must be thoroughly filtered to prevent the entry of predator organisms and competing organisms. After entering the water, aquatic plants should be planted or transplanted, floating plants, and sinks. Water plants and emergent plants are all taken into consideration. The total area of ​​aquatic plants accounts for about two-thirds of the total pond area, and a certain amount of artificial concealed materials must be added. The depth of the initial water intake should be slightly higher, and should be maintained at more than 1 meter. Base fertilizer should be properly applied, and about 200 kg of decomposed organic fertilizer should be applied per acre.