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Fry breeding method
1 The organic manure feeding method generally applies basic fertilizer 7 days before the lower seedlings of the fry, 300 kg of livestock manure or human urine per 667 m2, and breeds natural food organisms for feeding fry. After the fish enters the pond, the amount of topdressing is determined according to the water quality, weather, water temperature and the growth of the fish seedlings. Fertilizer is generally applied once a day and 100 kg of fertilizer per 667m2 is applied. After the hydrating slurry is added, the entire pool is sprayed evenly. 4d after the fish into the pool, such as early morning fry floating head, returned to normal after sunrise, indicating that the pool water is moderate; if it is still floating after 8 o'clock in the morning, then the water quality is too fat, should stop or reduce the amount of fertilizer; if not floating head, The light color should increase the amount of fertilizer. 2 Cake flour feeding method The cakes such as cotton cakes, rapeseed cakes or bean cakes are ground into dry powder for feeding fish. The advantage of this method is that the feed can be processed in a concentrated manner and it is easy to use. At the same time, spread the powder evenly over the water. With the surface tension of water, the dry powder floats in the pool water for a longer time than soybean milk, and the utilization rate is also higher than that of soybean milk. For each 667m2 water surface, use 2kg per d and feed it 3 times. 3 Fertilizer feeding method The basic fertilizer was applied 15 days before the lower seedlings of the fry, and 4 kg of ammonium sulfate and 7 kg of superphosphate were used per 667 m2. After the fish fry down the pond, the amount of top dressing was determined based on the water quality, the weather, and the growth of the fry. For every 667m2 of water surface, 2kg of ammonium sulfate and 0.5g of superphosphate are topped up every 3d. When the topdressing fertilizer is dissolved, the whole pool is sprayed evenly to prevent the fish from mistakenly swallowing chemical fertilizer particles and death occurs. 4 The straw-feeding method processes water hyacinths, water peanuts, duckweed and other aquatic plants into straw-fed fish fry. This method can reduce production costs. Quanchiposa, every d2 times, every day, 667m2 surface of water, 65kg of grass pulp, the specific amount depending on the surface of the water. The fry can directly ingest part of the straw pulp particles, and the rest of the straw pulp is decomposed in water to play a role of fertilizer and water. 5 soy milk feeding method is generally half a day after the fry under the fish, feeding soybean milk, first soaked in water soaked in water at about 25 °C, soaking 6h, too long or not enough time will affect the quality of soy milk, generally 1kg soybeans can be ground 15kg milk. The ground soybean milk should be sprinkled on the surface in a timely and uniform manner, once every d on the afternoon, and within 10 days of the fry in the lower bowl, 2 kg of soya-bean milk should be fed into every 667 m2 of water surface. After 10 days, depending on the color of the water and the growth of the fish, increase the amount of feed as appropriate. Generally raising 10,000 summer fish species requires 8kg soybeans.