Qiupu flower carp culture technology

Squid is a carnivorous fish with strong body fat, high fatness, tender meat, delicious taste, rich nutrition, rich in 8 kinds of amino acids essential to the human body. It is a low-fat health food. It is a typical carnivorous fierce fish that feeds on live fish for life and self-satisfaction when hungry. The Qiupu flower buds cultivated in Chizhou area belong to the Yangtze River water system, and the best season for breeding in the Yangtze River basin from mid-May to late June. In natural waters, males are sexually mature at 1 winter and females are sexually mature at 2 years of age. The suitable water temperature for spawning is 21~23 °C, and it is like to lay eggs in micro-flowing water.

1 pond single raise

1.1 Pond conditions
The pond area of ​​single-breed carp is generally 3 333.33~6 666.67m2. The pond is too small, the water quality is difficult to control, too large and difficult to manage. The depth of the pool is about 1.5m, the bottom of the pool is flat and less silt, the water intake and drainage are convenient, the water quality is fresh and pollution-free; the oxygen is fully equipped, and it is close to the bait fish supporting pond to facilitate the transportation of bait fish.
1.2 stocking of carp seedlings
10 to 15 days before the introduction of the fry, use the quicklime 1 500~2 250kg/hm2 or float to clear the pond with the concentration of 20mg/L. The pond with conditions can be drained in advance, expose the bottom of the pond, then add water 12~ 20cm, and clearing the pond and disinfecting. After 7 days of clearing the pond, water was injected and gradually deepened. Before the stocking of the carp fry, some suitable bait fish are cultivated in the pond. The general varieties are summer flowers such as sorghum, sorghum, grass, alfalfa and squid. It is suitable to cultivate 900~10.5 million tails/hm2. Squid seed is usually released from late May to late June. The specific time depends on the size of the bait fish, and it is necessary to ensure that the bait fish is palatable. Generally, stocking 7~8cm fish species is 1.2~1.5 million tails/hm2. In the same year, the production specifications of the commercial carp of more than 0.4kg 1,500 to 3 450kg / hm2.
1.3 feeding and feeding of bait fish
In addition to cultivating summer flowers from 900 to 10.5 million tails/hm2 before the stocking of carp, the bait fish must also have a special pool to cultivate bait fish, and the bait fish pond and carp culture pond are 2:1 to ensure the supplement of the later bait fish. . The bait fish should be raised in different densities in multiple pools, and the methods of catching and gradually pulling out should be carried out in stages to ensure the simultaneous growth of the bait fish and the carp. It is necessary to adhere to the daily patrol pond to observe the growth of squid, the eating situation and the quantity of bait fish, the change of water quality and the increase of bait fish. Keep the water quality good, diligently inject water and change water. Maintain water body transparency greater than 35cm, pH 7~8. In the hot season, the water level should be gradually increased, and the aerator should be started early, middle and late to increase dissolved oxygen in the water and reduce the content of harmful gases.
1.4 fish disease prevention
Carry out the principle of taking prevention as the main and combining prevention and treatment. When clearing the pond, disinfect with lime 1 125~1 500kg/hm2; or use topical insecticide to kill pond parasites. It is necessary to use non-polluted pesticides and disinfectants regularly to prevent them in the medium term. And every month, the whole pond is sprinkled with lime water of about 150kg/hm2 to adjust the water quality and inhibit the bacteria. If a disease is found, the diseased fish should be inspected in time, the right medicine should be prescribed, and the treatment should be carried out in a timely manner. The medicine sensitive to squid should be used with caution.

2 pond polyculture

The polyculture mode of ponds mainly includes polyculture of adult fish ponds, polyculture of crabs, and cultivation of ponds. High-yield adult fish ponds are not suitable for use. Due to the high density of adult fish, the water quality of a large number of feeds is prone to deterioration, which is very likely to cause squid to die of oxygen. For the medium and low yield ponds, the carp can be mixed. When squid is mixed, it is necessary to control the size of the squid seedlings so as not to harm the main fish. Place 600~750/hm2 of 3~4cm or 150~300/hm2 of 13~16cm. No increase in feeding, no special management is required, and the pond can be netted with 75-150kg/hm2 of squid.

3 cage culture

2.1 cage structure and specifications
The network cable of the cage is generally a polyethylene wire, and the mesh is preferably 1.5 cm, which is based on the principle that the bait fish cannot escape. It is also possible to set up a 2-level box, a dense cage in the early stage, and a thin cage in the middle and late stages. The cage size is 4m × 7m × 2m or 4m × 8m × 2m, and 3m × 3m × 2m can also be used, but the depth of water must be 1.5m, 50cm above the water surface. The cage is generally closed, with bamboo as the support material for the cage, and the bottom of the box is made of stone as a sinker, and should be more than 30cm away from the bottom of the water, so that the cage is naturally vertical.
2.2 Network box settings
The cage should be located at a location sheltered from the wind and the sun, the box distance is greater than 2m, and the line spacing is better than 10m.
2.3 Fish seeding
In the middle of June, the squid seedlings are placed, the size is 8~10cm or more, and it is suitable to put 20~300,000 tails/hm2.
2.4 bait fish matching and feeding
With a 1:50 pond, the feeding length of the bait fish should be less than 40% of the squid body. If it is too large, it should not be eaten, resulting in waste. The daily feeding amount is about 15% of the weight of the carp. Generally, it is fed once every 3~5d. Before feeding, apply 3%~5% salt water to dip the bait fish for 5~10min to ensure that the bait fish does not enter the box.
2.5 disease prevention
The four corners of the cage can be used for drug hanging bags, and the insecticide and disinfectant are regularly used in the whole box. Found sick fish, promptly pick up the examination, targeted treatment. The cage should be washed frequently to prevent the mesh from being blocked and affect the water body communication.

4 large water cover

The large water surface is set to raise the autumn flower buds. The size of the seedlings should not be small. Because the water is large, the density of the fish is relatively small, and the small size of the carp is difficult to catch food. Moreover, there are many large-scale enemy fishes, and small-sized squid has weak escape ability and is easy to be killed. The general stocking size fry should be 10~15cm. Under the condition of permission, the large-sized carp winter fish species will be better. The 120~180 fish/hm2 will be put into production, and the squid can be produced in the order of 75~120kg/hm2.