Liu Shouhai, a fisherman in the farmland of Linhai Farm, Jiangsu Province, used fish culture in aquaculture. He used the mixed carp and silver carp and the flower carp mixed breed model. This year, the fish yielded 2,400 jin per mu, and the average income per mu exceeded 3,000 yuan, becoming a farm aquaculture. Technology demonstration households.

In 2011, Liu Shouhai in the contracted 230-acre large-scale pond, the main breeding silver carp with white carp, flower carp mixed farming mode, achieved good results. In farming, he used seven technical measures as a starting point to upgrade his old experience.

1. Use the construction of cement slope protection in the high-yield breeding demonstration area of the fishery. Maintaining the water storage capacity of 2.0 meters, the bottom of the pool is flat, the sludge is about 30 cm deep, and the pond has good water retention. It is equipped with 12 large aerators and 12 feeding machines. The drainage is convenient and unimpeded.

Second, the stocking of fish species, the fish species are generally self-preserved pond species, the difference can be supplemented by the size of the fish species before the Spring Festival, to insert flowers in June and July, specifically the self-preserved pond species of silver carp 6-8 tail / In kilograms, 3,500 kilograms per acre, flowers, white peonys, 6 kilograms per kilogram, and 1,800 kilograms per acre. In June, 600 kilograms per kilogram of gibel carp, 40 kilograms per acre, and 150 acres per acre in July. Tail/kg of 245 kg of gibel carp, 6 kg of white mullet 200 kg/kg, 200 carp per fish/kg 24 kg, and 40 kg/kg of gibberium 250 kg per mu at the beginning of September.

Third, the feed is fed, the feed variety is mainly based on compound feed, and the concentrate material contains more than 25% of the pellets. It is fed in the middle and late March, and is fed 4 times a day in March and April, every day from May to September. Feeding 5 times, feeding 4 times a day in October and November, the specific feeding amount is adjusted according to the weather, water temperature, water color, and fish eating conditions. The fixed feeding position is subject to 45 minutes of feeding. In order to make the fish eat well, the total amount is controlled at 70%.

Fourth, daily management, in addition to diligent patrol ponds, diligent observation, mainly to manage the water quality, to maintain the water, live, cool PH control of the pool water is controlled at 6.5-8.0, dissolved oxygen is 4.5 mg / liter or more, transparency is about 20 cm, In order to prevent fish residue and excrement from sedimenting the bottom of the pond, the substrate is modified with a potent substrate conditioner and granule oxygen, and the microbial preparations such as Bacillus are used to regulate the water quality, according to the water color and the external water. Good or bad to decide the number of water changes, high temperature season, sunny day at noon daily aerator for 3 hours to ensure adequate oxygen in the water.

5. Prevention and control of fish diseases. Before the Qingming Festival and after the white dew, the avermectin was sprayed with the whole pool for insecticide. At the same time, the whole pool was sprayed with chlorine dioxide every other day. It was decided whether to use the medicine according to the activity of the fish and the feeding condition. Before the lower pond, the chlorine dioxide is used for treatment. Each time the water is added, the water injection port is disinfected with a stable chlorine dioxide disinfectant, and the chlorine dioxide disinfectant is used for disinfection after each pulling.

6. Launching hot water fish for catching and listing: The specific practice: pull the net from the end of April or early May, pull the net once every month or forty days, so as to catch the big and stay small, the fertility silver carp reaches 0.8 kg / Tail, white carp 1.5 kg / strip, flower 鰱 1.8 kg / strip can be listed, each pull net action should be light, fast, while paying attention to the fish's oxygen, after the net is disinfected.

Seven, looking at the market to sell fish, to maximize the benefits of breeding, fresh fish in the market before and during the breeding, the fish price is relatively high, and in the later stage of breeding, the freshwater fish in the market is relatively concentrated, farmers often appear to sell fish difficult phenomenon, The price of fish is low, and the use of round-trapping and wheel-displacement has changed the situation of spring shortage, summer-sum and autumn-squeezing of freshwater fish in the market, which not only meets the needs of the market, but also improves economic benefits. In addition, it is timely to replenish summer by catching large and small. Flowers and 1 year old fish species allow the fish species that are housed in adult fish ponds to grow rapidly, cultivating large-scale fish species for the coming year. This model avoids the risk of purchasing foreign fish species and is not subject to changes in fish species prices. And affect the final economic benefits.

[The following models of chlorine dioxide are suitable for use in aquaculture]

1, high purity chlorine dioxide disinfectant

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2, stable chlorine dioxide solution

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3, one yuan chlorine dioxide effervescent disinfection powder

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