In recent years, with the rapid development of urban fisheries in our province, many small reservoirs and small pontoon ponds have been used by people. They have developed a variety of businesses based on sport fishing and have achieved very good economic benefits. However, because these small reservoirs, small shoals, etc., are mostly unable to keep fish safe for the winter, these operators are all in spring, so they all prefer 250 to 400 grams of carp species and 300 when buying fish species in the spring. ~ 400 grams of carp species. Moreover, with the increasing requirements for the size of adult squid in the market, the average size of squid squid is 1.5 kilograms, which is much higher than the price of squid. Therefore, there is an increasing demand for large-scale species of carp in the breeding industry. In response to this fishery development trend, we have explored a breeding model for the cultivation of second-instar salmon species with large-sized pond species, and achieved good results. We now summarize the trials and training of our new fishery. I. Materials and Methods 1. A pool of pond test conditions is a rectangular earthen pond with an area of ​​10 mu. The pond is water-retaining and has an average water depth of 2.5 meters. The water source is good and sufficient, the water quality is clean and free of pollution. The pool is equipped with an aerator of 3 kilowatts. One. In mid-April, the depth of the pool was about 10 cm, and lime per acre was applied to 150 kg to kill germs and eliminate predators. Then 500 kg of organic fertilizer was applied per acre. After 5 days, the water was injected to about 1 meter deep. 2. Seed feeding (1) In early May, 15 days after the clear pond, the species of carp was put into use. The fish species are small-scale, 2nd-age fish species that have been specially cultivated in the previous year, with a specification of 35-50 g per tail, 40 kg per mu, and a ratio of 7:3 per carp. (2) At the beginning of June, put summer flowers and grass carp. Fertilize once in 7 days before stocking, fertilize the water quality, put 1,800 squid summer flowers per acre, grass carp summer 200, summer flowers require strong physique, neat specifications, no injuries. 3. Feeding management (1) Feeding and domesticating Feed a bait station in the middle of the long side of the fish pond. When the squid reaches 5 cm or more, the water quality begins to become thin, the transparency increases, and the natural food in the water is insufficient. It can be seen that the squid swims along the poolside to feed and begin domestication. This type of farming method is more critical for domestication. Some farmers have failed to master the domestication because they have not mastered the domestication method. Because there are a large number of second-instar carp species in the pond, when they start to accumulate with sound, etc., a large number of carp usually feed on the platform. The squid could not be put on stage. The specific approach is: use the reed rod made of the same year, the foil, the gap between the foil to pass through the eel and the eel just can not pass. Use a well-made foil to form a semi-circle about 3 meters away from the material table. In this way, when the fish are domesticated, the squid can freely feed on the table while the squid is unable to interfere with domestication. When all the catfish are on the stage and eat food actively, the domestication is successful. At this point, the foil is removed and normal feeding begins. (2) Feeding and breeding Feeding should be carried out strictly according to the four methods. The bait is the well-known manufacturers' fish seed material. Feed 3 to 4 times a day for 8:00 to 8:40, 11:00 to 11:40, 13:30 to 14:10, 17:00 to 17:40, and the daily feeding amount is the weight of the fish. 5% to 7%. (3) Water quality adjustment In late June, after the acclimation, the pool water is gradually deepened to 2.5 meters. Water is generally injected once a week to maintain the water level. The water is fertilized in time and fertilized in time to ensure the water's fatness and provide sufficient feed for the squid. After mid-July, adhere to the daily aerator, add a portion of new water to adjust. It is usually 3:00 to 6:00 in the morning, and 15:00 to 16:00 in the afternoon. When the cloudy sky is opened, the boot time is increased in the middle of the night. (4) Fish disease prevention and control of high-density intensive culture ponds and prevention of fish diseases is very important. We adopt the method of “prevention from illness and disease, early treatmentâ€, and apply 20 kg of lime every 10 days and regularly feed medicine baits. In addition, we do a good job of daily management work. We adhere to the patrol pond early, in the evening, and in the evening to clear the pond of dirt and dead fish. No major fish disease occurred during the culture period. II. Results and Benefits After the breeding of the test pool, the original pool was overwintering, and the ice was sold from mid-November to mid-April in the second year of April after opening ice. There was no dead fish during the winter under the ice. The pond averages 160 kilograms per mu, with an average weight of 265 grams per tail. The average yield is 60 kilograms per mu. The average weight is 320 grams per tail. The average yield is 250 kilograms per mu. The average weight is 360 grams per tail. The average total production of 770 kilograms of fish species, per mu production value of 6360 yuan, 4020 yuan per mu input, mu profit of 2340 yuan. 3. Summary and Experience 1. This type of aquaculture model adapts to the current demand of some farmers for large-scale fish species. 2. In this type of aquaculture, cultivation and domestication are the key to technology and should first be mastered. Second, in order to ensure the production and specifications of squid species, the water quality must be controlled. Third, in order to ensure the size of the carp species, not only must the feed pass, it is better to use a bait feeder. (Scientific fish farming)
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