Wells Water Plant Shrimp Technology
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I. Main breeding facilities
1. 28 indoor aquaculture ponds with a total area of ​​4 acres; 3 outdoor pools with an area of ​​1.5 mu, 1.5 mu and 8 mu respectively. A total of 15 acres.
2. Two deep-water wells with a depth of 90 meters, a salinity of about 16 inches and a sunrise water volume of 400 cubic meters. Groundwater is used as a water source for breeding to prevent contamination of bacteria. The indoor aquaculture pond is equipped with relevant temperature, light control equipment, and ground water. After the treatment, it enters the culture pond and conducts high density culture of white shrimps.
3. Dressing and disinfection of aquaculture ponds. In May, the organizers dredged and trimmed the cement aquaculture ponds, cleared sludge from the bottom of the pond, disinfected them with 50ppm bleaching powder, and then completely washed them with unpolluted groundwater, thus fundamentally preventing the spread of the disease sources. , ensure the smooth progress of aquaculture production.
Second, the water into the underground well water into the outdoor oxidation tank, oxidation week, and then placed in the sterile nursery room, training basic food organisms, 5 grams of urea water per cubic meter of water, 2 grams of superphosphate, after each day 50% of the amount before the application, so that the transparency of about 30 cm, ready to put seedlings.
Third, seed stocking
1. Selection of shrimp seedlings In shrimp farming, seedlings are very important. The quality of seedlings directly affects the success or failure of production. We purchased 6 million nauplii of healthy P. vannamei from the Jinjiang Nursery Farm in Fujian Province and conducted seedling cultivation. By mid-June, we produced 1.5 million commercial seedlings. The seed size was neat and the body length was about 1.5 cm. Lively and strong, strong ability to travel, transparent body, dark brown liver.
2. The time for planting seedlings was 6 months, and the water temperature in the tank was 21°C.
3. The seedling density of 1.5 million seedlings was placed in 31 cement pools, with an average of 100,000 seedlings per acre and 150 seedlings per square meter.
IV. Management during cultivation
1. Feeding In the aquaculture production, no fresh feed was used, and only feedstuffs were used to feed the fish according to the minimum standard for determining the feed length of the shrimp.
2. Change the water and change the water to take the method of adding water along with the leakage and siphoning. The groundwater will be oxidized and then put into the pool in the spring and autumn season. In the summer, the groundwater will be used directly, the water level will be kept at about 1.5 meters, and the water environment index will be controlled in: Oxygen is greater than 5 mg/l, total ammonia nitrogen is less than 0.6 mg/l, pH is 7.8-8.6, and daily fluctuations in salinity are less than 5 ‰.
3. Oxygenation Two oxygenators are installed in each aquaculture pond. Oxygen is added to the pool water depending on the water quality. Two hours in the early noon, and two hours to three hours in the dawn, and gradually increase the power-on time. In addition to shutting down the machine, it is usually turned on day and night to ensure that the water used for breeding is rich in dissolved oxygen.
4. Disease prevention and control Strictly sterilize culture ponds, apply dibromohydantoin+PV iodine once every half-month during high-temperature period, and regularly put high-efficiency nutrient solution for aquatic production so that no large-scale disease occurs during the breeding period.
V. Aquiculture effectiveness After 3 months of culture, the growth of shrimps is good. The average body length is up to 12 cm. A total of 11 200 kilograms of shrimp are produced, with an average of 60 pigs per kilogram. The survival rate is 50%. The average yield of shrimp is 750 kilograms. The price per kilogram was 40 yuan, and the total output value was 450,000 yuan. During the breeding period, the total investment and depreciation of fixed assets totaled 177,500 yuan, and the net profit reached 277,500 yuan. The input-output ratio was 1:2.53, and the economic benefit was considerable.