First, clear pond sterilization
In the 7 to 10 days before the stocking of fish, clear pond sterilization can kill all kinds of bacteria and wild fish, prevent fish diseases, but also can increase the calcium content of fish pond water, which is conducive to fish growth. According to the water depth of 1 meter, 667 square meters with 135 kg of quicklime, open heat and sprinkling; or fish pond water level dropped to 10 to 20 cm depth, 667 square meters with about 75 kg of lime, after the sputter.
Second, bred broodstock
Spring is the key stage of gonad development in broodstock. Early brooding is very important. First of all, we must do a good job of water quality management. The brooding pond should be filled with water in a timely manner. After March, the squid and carp ponds should be filled once every 10 to 15 days; the grass and grass ponds should be filled once every 2 to 3 days. Secondly, we must grasp the feeding of bait, early in the season should be fed a certain amount of cereal malt, soybean cake and other feed to promote gonad development of broodstock; middle and late grass carp to feed ryegrass, grass-based, alfalfa, carp feeding Cakes, bran.
Third, stocking fish species
Freshly excavated fish ponds and water surfaces that are not released in winter can generally be used to release excellent fingerlings when the spring water temperature reaches 8°C. To eliminate pathogens, the fish species can be immersed in 3 to 5% saline or 810-6 bleach for 20 to 30 minutes in front of the pond.
Fourth, in time to eat
Grass, cockroach and squid began feeding at a water temperature of 10°C and gradually increased their feed intake as the water temperature rose. Feeding the bait should be scheduled at a fixed time, once a day at the beginning, and then once in the afternoon and once in the afternoon. Feeding amount: 1.5% to 2.5% of the body weight of the fish, and the green feed is eaten within 4 to 5 hours after feeding. Better.
Fifth, pay attention to fertilization
After applying the basal fertilizer before irrigation, the pond should also be topdressed when the spring temperature rises to cultivate more natural food. Fertilizer amount is generally 50 to 100 kilograms of human waste per 667 square meters, or 100 to 150 kilograms of livestock manure. Such as chemical fertilizers to master nitrogen, phosphorus, potassium 1:1:0 5, a total of 1.5 to 2.5 kg. The fertilization cycle lasts from 10 to 15 days, and is shortened or prolonged depending on the type of fertilization, the weather, and the fatness of the pool. Its dosage should also be adjusted accordingly.
6. Add new water
In early spring, the water temperature is low, and the fish species are small. As the temperature rises, the fish grows and the water slowly deepens. Usually every half a month water injection, each water injection l0 ~ 15 cm, when the water to prevent the mixing of wild fish.
Seven, patrol pond management
Adhere to the morning and evening patrols to eliminate waterborne serpents, frogs, and squid hunters. If fish are found to be oxygen-depleted, they should be injected with fresh water or aerated with oxygen in a timely manner. Daily use of residual grass and bait should be done regularly. Bleach disinfection food and tools.
Eight, prevention and treatment
The common fish diseases in spring are watery mildew, gill rot disease, and small melon worm disease. Adhere to the "early disease prevention." To prevent the inflow of sewage, do not feed deteriorating feed. Drug prevention: Sprinkle the whole pool with l10-6 bleach and 0.710-6 copper sulfate solution and splash it once every one month or so. Found fish diseases, timely diagnosis, symptomatic treatment.
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