The head bream, commonly known as Wuchang fish, is suitable for breeding and growth in hydrostatic water bodies. It is easy to acclimate and eat food pellets in the condition of herbivorous and artificial culture. It is easy to fish in pond culture and the catch rate of the first net can reach 60% to 70%. The group head lice have strong disease resistance, high survival rate, rapid growth rate, easy production management, and large income increase potential. They are suitable for main pond breeding and breeding. The use of ponds for high-yielding cultivation of bream-headed bream can provide a large-scale, abundant-sized and superior-quality bream-headed bream species for the production of adult fish, which is an extremely important basic task.
First, the choice of fish breeding ponds and the area of ​​clear fish breeding ponds should not be too large, with a suitable range of 1-5 mu, preferably 2-4 mu. This kind of pond is convenient for production management and operation, and the pond water depth can maintain 1. 5-2.0 meters is better, the pool shape is better with the east-west rectangle, the pool embankment requires straight and tidy, the bottom of the pool should be flat, the mud should not exceed 10 cm, and the water retention performance of the pond is good. There must be excellent water sources near the pond, well-equipped water intake and drainage facilities, and the influent canal should be separated from the drain. In addition, there should be no lush trees and buildings on the poolside to avoid obstructing the sunlight and obstructing the ventilation and affecting the growth of pond plankton. Reproduction, increased water temperature, and dissolved oxygen content.
Pond cleaning and disinfection. It is better to clean the dry pond.
During the winter, the pool water was drained, and the bottom of the pool was frozen and exposed. Excessive silt was excavated and the embankment and pool slope were trimmed. In the 10 days before the fish pool, 10 cm of water is injected, and 100 kg of lime is used for the mu. The entire pool is splashed evenly afterwards, completely killing parasites, pathogens, and predators in the pond.
Second, the pond water injection and the use of basal clear pond disinfection 2-3 days after the start of the pool water injection, water injection at the inlet with a gauze filter, to prevent wild fish and predators and other water into the pool, the water injection depth to 1 About the meter is appropriate. After water injection, 150 kg of manure, such as chicken manure, is used as the base fertilizer for each mu of water. The manure should be used to make slurry from the use of water, and the whole pool should be sprayed evenly so that the water can maintain a suitable fatness.
Third, the release of summer fish species breeding group head carp species, mixed species should not be mixed too much, especially not with strong ability to catch grass carp, carp and other fish species. The density of cultivation should not be too large, and it is generally advisable to keep the density of summer flowers in bloom at 10,000 per acre. Specific standards can be stocked according to the following criteria: group head lice summer flowers about 8000 per acre, squid summer flowers about 1000 per acre, squid summer flowers about 500 per acre, Peng Zeying and other high quality squid summer flowers per acre
500 or so. After the main group of summer flowers heading into the pond, half a month later,
Then put the matching fish species. Quality requirements of summer flower species: neat specifications, bright body color, complete fins, no disease, no injury, swimming and lively, body and body fat, head small back wide. Summer fish species pond, to bath disinfection, soaked with 3% a 4% salt water 10-15 minutes, you can also use 10-20 mg / liter of potassium permanganate solution dip for 5-10 minutes.
Fourth, the cultivation of the management of the food feeding group of head bream fish species during the cultivation should be fed with granular food-based feed, in addition to meet the requirements of fish growth but also with the right amount of duckweed and other green food. With the bait protein content should be more than 30%. Here's a recommended bait recipe suitable for the head fish species, for reference: Fish meal
25%-35%, bean cake powder 10%-20%, corn flour
18%-23%, bran 5%-10%, yeast 10%-20%, inorganic mineral salt 2%-5%, soybean oil phospholipid 5%, multivitamin 0.1%,
The above principle is crushed as much as possible, and the mixture is fully stirred and made into pellets. According to the size of the fish species, in different growth stages, the particle size of the finished particles is different. It is suitable for the feeding of fish as the standard. The particle size of the early culture is generally 0.3-0.5 cm. 0.8-1.0 mm, the particle size of 1.5 mm is more suitable for the rear culture. After entering the pond, the head of the head fish can begin domestication feeding. Before bait, first knock on the bucket or tap a fixed object, wait for a while, and sprinkle a little granular food, so repeated, about after a week Around the time, the species can develop the habit of catching food on the floating surface. The ability of feeding and feeding of the head bream fish is not as good as that of squid and other fish. They should be patient when they are domesticated and fed. In line with the principle of “less sacrificial dipping,†each feeding should last for a long time. When feeding, feed in the “slow-quick-slow,†“less one-one-one-one-less†approach, and try to get the fish to “get fullâ€. The determination of the bait rate depends on the weather, water temperature, and the fish's diet. Practice has shown that during the cultivation period, August-September is the peak of the bait of the fish species, the water temperature is appropriate at this stage, and when the water quality is well controlled, the fingerlings are invigorated and grow rapidly. Daily feeding rate during this period is generally
4%-5%, the two-month feeding amount accounts for the feeding amount during the incubation period
More than 60%. At the same time as feeding with food, the appropriate supplement of green feed has a good role in promoting the growth of the head fish species. The varieties of green food are generally: Azolla, duckweed,
Purple duckweed, cut off all kinds of fresh vegetable leaves, young grasses planted along the pond. Generally after the concentrate feed, suitable amount of green feed, the amount should not be too much, to finish the day. In the middle and late aquaculture, the daily feeding amount per mu is generally 20-30 kg.
Fifth, the water quality of cultivation ponds The cultivation of the group head carp species, the water quality must always maintain a fresh and high dissolved oxygen state, with the white fish species, is to use their feeding habits of plankton, so that the water body water quality to maintain a good state, so as not to water quality Over-fertilization, the transparency decreases. The specific water quality control indicators are: when the summer fishes are planted in the pond, the water depth is controlled at about 1 meter, and the water body transparency is 25-30 centimeters. It is appropriate to gradually deepen the water level as the species grows. In early August, the water level is generally to be 1.5. Above meters, the transparency of the water is controlled at 30-40 cm. Water quality adjustment measures: First, change the water, the main water injection in the early stage, water injection once a week, each time
10-15 centimeters, when the water level is stable at 1.5 meters, it is mainly to change the water, change the water once every 10-15 days, each time 20-30 centimeters. The second is the use of quicklime, late August, early September,
Each of the 30 ppm limes was splashed once and the interval was two weeks. The third is the use of oxygen aerators to increase oxygen. In the middle and later stages of fish species cultivation, the oxygen consumption of fish and other organisms in the water body increases.
According to the requirements of oxygen generators, the oxygen should be turned on at a proper time to meet the requirement of dissolved oxygen for fish species. The fourth is the use of microbial preparations,
Such as photosynthetic bacteria, etc., can be applied according to the requirements of the water body, so that the water to maintain the dominant status of beneficial bacteria, inhibit the proliferation and growth of harmful bacteria.
Sixth, the scientific prevention and control of diseases and diseases of the head carp species in the breeding process, the incidence of disease is relatively small, but still can not be taken lightly, all measures to prevent disease should be put in place. The principles of prevention, prevention and treatment are emphasized. Disinfection of fish ponds, disinfecting fish, and disinfection of tools must be strictly implemented. In the culture, the body and the food field are sterilized, sterilized and exterminated on a regular basis. The bromochloroheine and crystal trichlorfon are used as the high-efficient and low-toxic drugs. When used, fungicides and insecticides are alternately used, and no mixed application is allowed. Months. Ingestion can also be used in the flood season to prevent disease, improve the fish's resistance to disease and prevent the occurrence of various diseases. In breeding and production, we must also do a good job of flood prevention and anti-theft and other work, and promptly do a good job of production records and medication records.
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