Polyculture is a form of ecological fishery that combines organically cultivated pearls with pond fish. Practice has shown that oyster polyculture produces more than 30 kilograms of squid per 667 square meters, and receives 15 kilograms to 20 kilograms of pearls, which can achieve a net profit of 3,500 to 4,000 yuan.
I. Breeding Conditions The polyculture pond is a standard rectangular earth pool with several water depths of about 2 meters. Each aerator is equipped with an aerator, and the water is directly extracted from the outside. The water quality can be adjusted at any time. Another set of electric water pump is installed. Luxurious aquatic products, squid and swiftlet combined with polyculture, can be used for different feeding habits. The squid eats low-value fish and uses squid's bait and excrement to fertilize water, which is conducive to reproduction of pond plankton. Plankton has become a natural food for the spinnaker.
Second, seed stocking
At the end of February, each pond was disinfected with lime, exposed to sunlight, and applied with organic fertilizer. At the end of March, there were 80 species of squid 15 centimeters, 20 species of grass carp 20 centimeters, and 10 species of 8 centimetres carp species per 667 square meters. From March to May, 1,000 semi-finished spinners were bred and 600 spines were stocked.
In addition, a group of 0.67 hectare ponds were stocked with 100 pairs of brooding silver broodstock broodstock. In mid-April, 7 million pieces of silver carp seedlings 2.5 cm were bred as bait for squid. In mid-May, 20,000 catfish with a size of 3 cm will be stocked in this pond; by the end of June, when the size of carp fingerlings is 12 centimeters, it will be transferred to a polyculture pond in a fish pond and stocked with 60 fish per 667 square meters. Before stocking, the fish was disinfected with potassium permanganate solution.
Third, the beginning of feeding and management, put the duck manure in the pond for composting, the amount of 800 kg to 1000 kg per 667 square meters; after every 10 days flip 1, cultivate plankton in the water, so that there is enough food bait; August to September , 20,000 per 667 square meters of carp carp fry feeding for squid supplement bait to promote the growth of carp.
Squid and spiny bream tend to eat well, grow fast, and consume high oxygen in the summer. It is necessary to focus on mastering the diet and the dissolved oxygen in the water. Every day, 667 square meters spill 12.5 kilograms of soybean milk and feed the bean dregs. The pump room is regularly infused or drained according to the weather and water quality changes. The water is changed every day 2 weeks before the cultivation; the water is changed every 2 to 3 days in the 3rd to 4th week; the water is changed 1 time in the later period, and the water exchange rate is changed to the pond each time. 1/4 of total water.
Regularly do fish worm disinfection and disease prevention. The spinnaker oysters are soaked in a concentration of 2010E-6 potassium permanganate solution for 20-25 minutes prior to stocking, and they are sterilized and sterilized. Before the stocking of carp, strict fish disinfection is performed to ensure the survival rate. In the later period of stocking, 1 quicklime and bleaching powder shall be cast every month. Sprinkle amount shall be 15 kg of quicklime and 1 kg of bleaching powder per 667 square meters to prevent the occurrence of fish gill disease and calcium supplementation.
I. Breeding Conditions The polyculture pond is a standard rectangular earth pool with several water depths of about 2 meters. Each aerator is equipped with an aerator, and the water is directly extracted from the outside. The water quality can be adjusted at any time. Another set of electric water pump is installed. Luxurious aquatic products, squid and swiftlet combined with polyculture, can be used for different feeding habits. The squid eats low-value fish and uses squid's bait and excrement to fertilize water, which is conducive to reproduction of pond plankton. Plankton has become a natural food for the spinnaker.
Second, seed stocking
At the end of February, each pond was disinfected with lime, exposed to sunlight, and applied with organic fertilizer. At the end of March, there were 80 species of squid 15 centimeters, 20 species of grass carp 20 centimeters, and 10 species of 8 centimetres carp species per 667 square meters. From March to May, 1,000 semi-finished spinners were bred and 600 spines were stocked.
In addition, a group of 0.67 hectare ponds were stocked with 100 pairs of brooding silver broodstock broodstock. In mid-April, 7 million pieces of silver carp seedlings 2.5 cm were bred as bait for squid. In mid-May, 20,000 catfish with a size of 3 cm will be stocked in this pond; by the end of June, when the size of carp fingerlings is 12 centimeters, it will be transferred to a polyculture pond in a fish pond and stocked with 60 fish per 667 square meters. Before stocking, the fish was disinfected with potassium permanganate solution.
Third, the beginning of feeding and management, put the duck manure in the pond for composting, the amount of 800 kg to 1000 kg per 667 square meters; after every 10 days flip 1, cultivate plankton in the water, so that there is enough food bait; August to September , 20,000 per 667 square meters of carp carp fry feeding for squid supplement bait to promote the growth of carp.
Squid and spiny bream tend to eat well, grow fast, and consume high oxygen in the summer. It is necessary to focus on mastering the diet and the dissolved oxygen in the water. Every day, 667 square meters spill 12.5 kilograms of soybean milk and feed the bean dregs. The pump room is regularly infused or drained according to the weather and water quality changes. The water is changed every day 2 weeks before the cultivation; the water is changed every 2 to 3 days in the 3rd to 4th week; the water is changed 1 time in the later period, and the water exchange rate is changed to the pond each time. 1/4 of total water.
Regularly do fish worm disinfection and disease prevention. The spinnaker oysters are soaked in a concentration of 2010E-6 potassium permanganate solution for 20-25 minutes prior to stocking, and they are sterilized and sterilized. Before the stocking of carp, strict fish disinfection is performed to ensure the survival rate. In the later period of stocking, 1 quicklime and bleaching powder shall be cast every month. Sprinkle amount shall be 15 kg of quicklime and 1 kg of bleaching powder per 667 square meters to prevent the occurrence of fish gill disease and calcium supplementation.
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