Fan Weiyi, aquaculture farmer of Yifeng Town, Yandu District, Yancheng, carried out polyculture of fishponds in 4 fish ponds with a total area of ​​580 mu. In 2006, a total of 691.1 tons of adult fish and 2.9 tons of pearls were harvested, and the total output value was 3.998 million yuan. The net profit was 168.2. Ten thousand yuan, an average profit of 2,900 yuan per mu. The technical experience of Fan Wei’s fish and polyculture is described below.
Fish species are stocked for 1 to 3 months. 150 mu per hectare, 50 mussels, 50 mu fish weighing 150 g, 50 muyu silver crucian weighing 50 g, 10 to 20 grass carp weighing 400 mu and weighing 100 The head of the gram was 100 heads. Fish species are bathed with 3% to 5% salt solution before bathing.
The cultured pearls are hung on both sides of the pond using bamboo or tree stumps to form a fixed support frame, and the suspending ropes are fixed on the support frame. The distance between each rope is 3 to 4 meters, and the plastic bottle or foam block is placed on the rope every certain distance. It is advisable for the quantity to be surfaced after hanging. Choose a commercial polyethylene mesh bag, put a round bamboo ring on the bottom of the bag, spread the mesh bag, put 3 to 4 beads for each bag, and use a polyethylene rope to suspend the mesh bag on the rope. 30 cm with bag spacing. There are about 2,500 breeding pearls per acre of water.
Common feeds for fertilization include rapeseed cakes, cottonseed cakes, etc. Every day from 8 to 9 o'clock in the morning and from 3 to 4 o'clock in the afternoon, they are fed once and the feeding amount is 7% to 8% of the weight of the fish. In the spring and autumn seasons, the decomposed human or animal manure or green manure is splashed in the whole pond, so that it is used less frequently and industriously. In summer, the ratio of nitrogen to phosphorus is 2 : 1 in proportion to the ratio of nitrogen to phosphorus; the inorganic fertilizer is mainly used in the early autumn, and the organic fertilizer is used later. Mainly; stop fertilizing in winter.
Day-to-day management In the early stages of lifting the ball, check whether there is any death or dismemberment and remove the dead childbearing eggs in time. Regularly check the support racks, mesh bags, hanging lines, and the fat and water, thin water, enemies, and rickets, etc., and find problems in a timely manner. According to the season, the breeding depth of the Yuzhuyu is adjusted timely. The summer and winter hanging bags are 40 to 50 centimeters away from the water surface, and the spring and autumn hanging bags are 15 to 20 centimeters away from the water surface. From April to October, the mesh bag and clam shell are brushed every 1 to 2 months to remove the attachments.
Disease prevention and control adhere to the principle of prevention, prevention and treatment. Sprinkle quicklime regularly. During the main growing season (July-October) of the Yuzhuyu, every 15 days, the whole pool of lime slurry is splashed once and every time, 15-20 kg of lime are used per acre. Strictly control the source of pollution in the breeding waters of the Yuzhu Lake and cut off the transmission of diseases. The timely and accurate diagnosis of fish and carp was found and symptomatic treatment was performed.
Fish species are stocked for 1 to 3 months. 150 mu per hectare, 50 mussels, 50 mu fish weighing 150 g, 50 muyu silver crucian weighing 50 g, 10 to 20 grass carp weighing 400 mu and weighing 100 The head of the gram was 100 heads. Fish species are bathed with 3% to 5% salt solution before bathing.
The cultured pearls are hung on both sides of the pond using bamboo or tree stumps to form a fixed support frame, and the suspending ropes are fixed on the support frame. The distance between each rope is 3 to 4 meters, and the plastic bottle or foam block is placed on the rope every certain distance. It is advisable for the quantity to be surfaced after hanging. Choose a commercial polyethylene mesh bag, put a round bamboo ring on the bottom of the bag, spread the mesh bag, put 3 to 4 beads for each bag, and use a polyethylene rope to suspend the mesh bag on the rope. 30 cm with bag spacing. There are about 2,500 breeding pearls per acre of water.
Common feeds for fertilization include rapeseed cakes, cottonseed cakes, etc. Every day from 8 to 9 o'clock in the morning and from 3 to 4 o'clock in the afternoon, they are fed once and the feeding amount is 7% to 8% of the weight of the fish. In the spring and autumn seasons, the decomposed human or animal manure or green manure is splashed in the whole pond, so that it is used less frequently and industriously. In summer, the ratio of nitrogen to phosphorus is 2 : 1 in proportion to the ratio of nitrogen to phosphorus; the inorganic fertilizer is mainly used in the early autumn, and the organic fertilizer is used later. Mainly; stop fertilizing in winter.
Day-to-day management In the early stages of lifting the ball, check whether there is any death or dismemberment and remove the dead childbearing eggs in time. Regularly check the support racks, mesh bags, hanging lines, and the fat and water, thin water, enemies, and rickets, etc., and find problems in a timely manner. According to the season, the breeding depth of the Yuzhuyu is adjusted timely. The summer and winter hanging bags are 40 to 50 centimeters away from the water surface, and the spring and autumn hanging bags are 15 to 20 centimeters away from the water surface. From April to October, the mesh bag and clam shell are brushed every 1 to 2 months to remove the attachments.
Disease prevention and control adhere to the principle of prevention, prevention and treatment. Sprinkle quicklime regularly. During the main growing season (July-October) of the Yuzhuyu, every 15 days, the whole pool of lime slurry is splashed once and every time, 15-20 kg of lime are used per acre. Strictly control the source of pollution in the breeding waters of the Yuzhu Lake and cut off the transmission of diseases. The timely and accurate diagnosis of fish and carp was found and symptomatic treatment was performed.
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