In order to explore the pond pond culture technology in Guangxi, the author conducted a test of pond fish culture in a pond with an area of ​​4329 square meters from May 16 to November 10, 2001. After 176 days of cultivation, the harvested goods were harvested. 2547kg of fish (including 1487kg of pond fish, 1060kg of carp, carp, carp, etc.) achieved good breeding results. The main breeding techniques are as follows: 1. The area of ​​ponds with a pond test area of ​​4,329 square meters is selected, and the embankment height of cement brick ponds is 2 meters. The bottom of the pond is slightly shaped like a pot and the organic silt is about 30 cm thick. The test pond is resistant to escape and has good water retention performance, and it is convenient for drainage and irrigation. Second, the construction of the pond facilities in the bottom of the pond to install a drainage pipe with an inner diameter of 25cm, one end of the nozzle extends to the deepest point of the pond, the barbed wire is installed on it, the other end leads to the outside of the pond, and equipped with valves to facilitate control of the water level. In the pond, 20 asbestos tiles are placed in the form of “five-point plums†and the asbestos tiles are raised with bricks. The distance from the tile surface to the bottom of the pool is about 20 cm. On the surface of the pond, 50 square meters of water hyacinth were bred to provide shelter and shade for the pond catfish. Install fish traps at the inlet to prevent fish escape. III. Disinfect the Fishpond Before putting the fish, thoroughly disinfect the pond with 500kg of quicklime. Return the water for 15 days and test the water to prove that the toxicity has disappeared before releasing the fish. Fourth, rational stocking of fish species The main pond is used to raise fish ponds, and it is appropriate to match other fish. In order to increase the survival rate, the fish species of pond catfish are first kept for a week in cages in test ponds and fed to zooplankton or Chopped crickets and animal viscera and other fine ingredients make the fish more robust and then released in ponds. Fifth, science feed feeding homemade soft pellet feed, feed formula: fish meal 27.5%, peanut cake 30%, wheat bran 30%, secondary flour 10%, mineral additives 2%, salt 0.5%, Plus an appropriate amount of animal vitamins. The particle size of the pellet feed is adjusted between 1-3 mm depending on the size of the pond catfish. The daily feed intake assessed 4-8% of the total weight of the pond carp and was fed in the morning, afternoon and evening. Before each feeding, the sound of rock hitting the pond embankment was used to make the fish form a conditioned reflex to hear the noise. Sixth, adjust the water quality In the early stage of aquaculture, the pond water depth is controlled at 0.5m. During the middle period of aquaculture, the depth of the pond is gradually deepened to 1.5m. In the later period of cultivation, part of the old water is drained every 3 days to 5 days, and the same amount of fresh water is added at the same time. Generally, the water volume is changed by 5-10cm each time. Every 10-15 days, appropriate human manure (dung water), green manure and other fertilizers should be applied. During the cultivation period, the water quality always remained oil green or dark brown, and the biomass of phytoplankton and zooplankton was maintained at 30 mg/L to 80 mg/L and 15 mg/L to 29 mg/L, respectively. Table pond Fertilization Unit: kg Month 5 6 7 8 9 10 Total human waste 700 1200 1500 1500 1500 1600 8000 Green manure 520 600 480 550 440 350 2900 Seventh, do a good job of fish disease prevention during the breeding period, every 3 weeks Quanchipite is splashed with lime water once. The dosage of the drug is calculated as 150kg per hectare. The quicklime is dissolved in water and the whole supernatant is sprayed evenly. The oxytetracycline baits were alternately administered every 15 days for a course of 3 days and 2-3 g of drug was added per kilogram of feed.
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