Culture technique of red crucian carp in pond

The body shape of red crucian carp is similar to that of tall allogenic silver crucian carp, and its growth rate is fast, and the fish fry can reach 300 grams in that year. The feeding speed is faster than that of high-backed crucian carp mixed in the same pond, and the feed utilization rate is effectively improved. The ability of disease resistance is strong, and no disease has been found in culture in the past two years. The body color is fiery red, the color is bright, the meat is fresh and tender, and it has double economic value of edible and ornamental. 1. Fish fry cultivation techniques 1. Cleaning and disinfection of fish fry ponds: in late March, prepare the fry ponds. The fry ponds should be rectangular in east-west direction with an area of 1 mu and a water depth of 0.8-1.5 meters. Remove weeds in the pond, remove excessive silt from the bottom of the pond, and disinfect the fish fry pond with quicklime. 2. Water injection to improve water quality: after 3 days of disinfection in the cultivation pond, add new water to the water level of 0.5 meters, and install the filter when adding water. Fertilize the water quality, ferment 300 kg of human and animal manure per mu. 3. time of fry going down to the pond: choose a sunny day at about 10:00 in the morning, and release the fry in the upwind where there is little silt and hard sediment. The stocking density of fish fry is 200000 per mu. 4. Feeding and management of fish fry: after the fry went into the pond, the fry was fed with soybean milk twice a day and sprinkled in the whole pond, and 5 kilograms of dried soybeans were fed per mu every day. The rate of daily gain of fish fry is fast in the cultivation stage, so it is necessary to inject new water uninterruptedly to increase the volume of water and the amount of dissolved oxygen. When the red crucian carp seedlings after more than 20 days of cultivation, when the body length reaches 5cm to 8cm, it can be divided into ponds to enter the fish breeding stage. 5. Breeding and management of fish species: 5000 red crucian carp summer flowers, 200 silver carp slices and 1000 Wuchang fish are released per mu. The red pigment of red crucian carp increased gradually in the middle of July, and basically showed red at the end of July. The management of red crucian carp is basically the same as that of high-backed crucian carp. Second, adult fish culture technology 1, pond conditions: an area of 520 mu, water depth of 1.5 to 2.5 meters, complete drainage and irrigation facilities, convenient transportation, adequate power supply. 2. Planting time and density: fish species are released after the pond is cleaned in winter every year. Mixed culture: 300 red crucian carp with a tail weight of about 50 grams per mu, 600 high-backed crucian carp (or other excellent crucian carp) and 50 Wuchang fish. The main culture mode: 800 red crucian carp with a tail weight of about 50 grams per mu, 200 high-backed crucian carp and 50 Wuchang fish, and silver carp in the upper water body. Soak the seeds with 3% salt water for 5 minutes for 10 minutes. 3. Feeding and management: red crucian carp has a small amount of food in winter, so it is appropriate to feed peanut bran cake. With the increase of water temperature in early spring, the mixture can be fed, or pellet feed containing 32% crude protein, with a particle size of 2 mm and a daily dose of 2% of body weight, can be fed. The food intake of red crucian carp increases in June, especially at the end of June to September, and the daily intake is flexibly controlled according to 5% to 8% of body weight. Wuchang fish is mainly green fodder, supplemented by concentrate, which is picked up and fed every morning. In October, red crucian carp, high-backed crucian carp and Wuchang fish tail weight all reached 400 million 500 grams, at this time to balance the market sales. In the peak growing season, add new water regularly to adjust the water quality. The aerator is turned on at dawn and sunny noon for 1-3 hours every day. Put quicklime once every half a month, 40 kilograms per mu, and sprinkle the chemical pulp in the whole pond to prevent fish disease.