At present, it is the key season for the stocking of shrimps in autumn and winter. Grasping seed quality, germplasm, food and water quality control, and effectively preventing diseases and preventing floating heads are the top priorities for increasing shrimp production at the end of the year. Talk about the technology of intensive culture of shrimp, for the reference of the majority of farmers.
First, grasp the basic construction of shrimp ponds. Grab the dry pool before the stocking, clear ponds, detoxification, and drying pools. Change the practice of raising only the sunless ponds. Because a large number of bacteria are produced in the pool after a year of breeding, the sludge in the pool is more likely to make the shrimp lose oxygen. Large pools should be reconstructed, and pools should be raised and widened. The suitable pond area is from 8 mu to 10 mu, and the water depth is from 1.2 meters to 1.5 meters. There must be a certain area of ​​shrimp beach, and there is a set of shrimp valleys in the middle, which is matched with the drainage system. The bottom of the pool is disinfected with 60kg to 70kg of quicklime in the pool and exposed to sunlight for 15 days to 20 days.
Second, timely fertilization Fertilizer is mainly to cultivate the early water quality, so that after opening the shrimp can have a moderate amount of open mouth zooplankton, the main application of fermented organic fertilizer, 150 kg per mu ~ 250 kg. In addition, the promotion of the application of chicken manure pellet fertilizer, the principle is that the fertilizer after high temperature sterilization treatment, after the application is not easy to pollute the water environment, and chicken manure contains elements of potassium, which is conducive to the growth of shrimp carapace. The fertilization time is suitable 4 days to 5 days before the shrimp is put. The old pond is applied with 10 kilograms to 15 kilograms per mu, and the new pond is 15 kilograms to 20 kilograms. Quanchiposa. If the water quality is still light after stocking, fertilization can be increased by 5 kg to 7.5 kg, to reach the pool water, live, tender, cool, to prevent the emergence of moss, blue net algae.
Third, reasonable stocking The shrimps are stocked in the fall from late July to early August. The shrimp farmers choose Taihu Lake to cultivate wild shrimp seedlings. The principle is that the wild shrimps have strong disease resistance, neat specifications and high market share. The stocking size is 1.5 cm to 1.8 cm, and the acreage is 60,000 to 80,000. 10 to 15 days after stocking, set up to spend 800 to 1000 tails of summer flowers and 800 to 1000 tails of silver carp.
Fourth, feeding and water quality management Stocking shrimp should be selected sunny, if the pool when there is moderate amount of red worms in the pond, 1 day to 2 days can not feed food, wait until the red worm is eaten and then feed the food. The bait should be selected for high-quality green shrimp special feed, such as Dajiang brand feed. The first 15 days to 20 days feeding crushing material, the medium-term for the 1st material, the latter for the 2nd material, and add animal small trash fish. Per mu produce 100 kilograms of autumn shrimp, 150 kilograms of grain feed, 50 kilograms of miscellaneous fish or 750 kilograms of snails, 1.8 to 2 bait, and a bait cost of 500 to 600 yuan.
V. Prevent diseases, prevent floating heads and other management work After 15 to 30 days of stocking of young shrimps, select 4 to 5 kg of quick lime per acre for sunny days. If bacterial shrimp disease is found, chlorine dioxide or “strong chlorine can be used. "Fine", generally 200 grams per mu. The water plants in the pool should be kept at one-third, and mosses can be used to make up the fat. The green sand and seaweed can be used to make up the white water turtles. A 3000 watt aerator can be used every 6 to 7 acres, 20 days after stocking, and 1 hour to 2 hours at noon every day. During the rainy morning and early morning hours, it is necessary to ensure the prevention of floating. Inlet should adopt double channel net (60 mesh, 80 mesh) to strictly filter wild fish.
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