In the first and second seasons, the fish will grow into fish in the first half of the year and breed fish in the second half of the year. In the two seasons of the year, fish can increase the utilization of fish ponds, reduce the rent per unit of fish, and increase the economic benefits of fishery. The main points of its management technology are as follows:
First, the conditions of the fish pond (1) are suitable and the depth is moderate. Taking into account the operability of net catch and dry pond fishing, fish ponds with an area of ​​3-15 acres and a water depth of 1.5-3 meters are generally selected.
(2) Adequate water sources, convenient drainage and irrigation, and convenient transportation. Due to the greater labor intensity of fish and fish species, fertilizers, feed, and adult fishes in the two seasons, more emphasis is placed on transportation.
Second, accurately grasp the production process to accurately grasp the production process is an important guarantee for the two seasons of fish. According to the climatic conditions of Yongzhou City, Hunan Province, the experience of the past years is as follows:
Feeding of fingerlings in January-February - Enhanced feeding during March-June - Sale of fish from June - Fish fingerlings of the year prior to July 15th - Intensive cultivation from August to October - November-December Sell ​​fish species at the end of the year.
Third, adult fish management technology points (a) fish stocking. Restocking time should be as early as possible, not later than February. Early stocking can allow fish species to adapt early and feed early. 15 days before stocking, fish ponds must be completely cleared in clear ponds, and basal fertilisers should be applied after clear ponds for 3 days. Fish species require the same specifications, strong physique, no disease or injury, and they must be immunized or sterilized when they are released. Fish rearing is mainly based on large-size edible fish. The stocking density can be referred to the following (tail/mu): 0.2-0.50 kg grass carp 250, 0.2-0.5 kg grasshopper 100 tail, and 0.05 kg good seed grasshopper 100 tail.
(b) Strengthen feeding. The first is to promote early eating. After the fish species are released, they can be bred with high-quality pellet feed. By the beginning of March, they can reach normal food intake. Second, they can increase the feeding rate from April to June. They can be divided into 3%-5% of the body weight of fish every 2 times. Feeding, and with a suitable amount of young grass, lettuce leaves and other green feed.
(c) Water quality regulation. As the feed is fed every day, the water quality is prone to deterioration, and new water should be added in time to adjust the water quality and increase the dissolved oxygen in the water so that the transparency of the pool water is about 25 centimeters, so that the grass carp does not float. If necessary, an aerator should be equipped, and it should be turned on for 1-2 hours at noon on sunny days.
(d) to strengthen the prevention and treatment of fish diseases. The main prevention and treatment of diseases such as red skin, gill rot, enteritis, and surface parasitic diseases, adhere to the prevention, water disinfection once a month, once every 15 days feeding bait.
Fourth, fish species management technology points (a) fish species should pay attention to the issue. First, the disinfection of the clear pond should be thorough and kill the wild fish; Second, the base fertilizer must be applied; Third, the fish should be carefully handled during fishing and immersion disinfection to prevent injury.
(ii) Stocking density. Can refer to the following: Each acre stocking about 7 centimeters of grass seed 3000, about 5 centimeters squid species of 5000, about 3 centimeters of good species of squid species 100 tail (in that year can develop).
(c) feeding fertilizer. Feed pellets are mainly pellet feeds, and 8%-10% of the fish's weight should be cast during intensive cultivation from July to October, and they should be fed 3 times a day. Fertilization should be based on water color, mainly organic fertilizer, to maintain water quality "fertile, live, tender and cool." If water quality is found to be worse, change the water promptly.
(d) fish disease prevention and control. Common diseases of grass carp species include hemorrhagic disease and surface parasitic disease. Bleeding powder and rare earth fish mixed feed can be used to prevent hemorrhagic disease. Once a month, exterminator is used to kill water body parasites.
First, the conditions of the fish pond (1) are suitable and the depth is moderate. Taking into account the operability of net catch and dry pond fishing, fish ponds with an area of ​​3-15 acres and a water depth of 1.5-3 meters are generally selected.
(2) Adequate water sources, convenient drainage and irrigation, and convenient transportation. Due to the greater labor intensity of fish and fish species, fertilizers, feed, and adult fishes in the two seasons, more emphasis is placed on transportation.
Second, accurately grasp the production process to accurately grasp the production process is an important guarantee for the two seasons of fish. According to the climatic conditions of Yongzhou City, Hunan Province, the experience of the past years is as follows:
Feeding of fingerlings in January-February - Enhanced feeding during March-June - Sale of fish from June - Fish fingerlings of the year prior to July 15th - Intensive cultivation from August to October - November-December Sell ​​fish species at the end of the year.
Third, adult fish management technology points (a) fish stocking. Restocking time should be as early as possible, not later than February. Early stocking can allow fish species to adapt early and feed early. 15 days before stocking, fish ponds must be completely cleared in clear ponds, and basal fertilisers should be applied after clear ponds for 3 days. Fish species require the same specifications, strong physique, no disease or injury, and they must be immunized or sterilized when they are released. Fish rearing is mainly based on large-size edible fish. The stocking density can be referred to the following (tail/mu): 0.2-0.50 kg grass carp 250, 0.2-0.5 kg grasshopper 100 tail, and 0.05 kg good seed grasshopper 100 tail.
(b) Strengthen feeding. The first is to promote early eating. After the fish species are released, they can be bred with high-quality pellet feed. By the beginning of March, they can reach normal food intake. Second, they can increase the feeding rate from April to June. They can be divided into 3%-5% of the body weight of fish every 2 times. Feeding, and with a suitable amount of young grass, lettuce leaves and other green feed.
(c) Water quality regulation. As the feed is fed every day, the water quality is prone to deterioration, and new water should be added in time to adjust the water quality and increase the dissolved oxygen in the water so that the transparency of the pool water is about 25 centimeters, so that the grass carp does not float. If necessary, an aerator should be equipped, and it should be turned on for 1-2 hours at noon on sunny days.
(d) to strengthen the prevention and treatment of fish diseases. The main prevention and treatment of diseases such as red skin, gill rot, enteritis, and surface parasitic diseases, adhere to the prevention, water disinfection once a month, once every 15 days feeding bait.
Fourth, fish species management technology points (a) fish species should pay attention to the issue. First, the disinfection of the clear pond should be thorough and kill the wild fish; Second, the base fertilizer must be applied; Third, the fish should be carefully handled during fishing and immersion disinfection to prevent injury.
(ii) Stocking density. Can refer to the following: Each acre stocking about 7 centimeters of grass seed 3000, about 5 centimeters squid species of 5000, about 3 centimeters of good species of squid species 100 tail (in that year can develop).
(c) feeding fertilizer. Feed pellets are mainly pellet feeds, and 8%-10% of the fish's weight should be cast during intensive cultivation from July to October, and they should be fed 3 times a day. Fertilization should be based on water color, mainly organic fertilizer, to maintain water quality "fertile, live, tender and cool." If water quality is found to be worse, change the water promptly.
(d) fish disease prevention and control. Common diseases of grass carp species include hemorrhagic disease and surface parasitic disease. Bleeding powder and rare earth fish mixed feed can be used to prevent hemorrhagic disease. Once a month, exterminator is used to kill water body parasites.
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