Four ways to quickly raise fish seedlings
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Manure cultivation method: in the fish pond before the first base fertilizer, the water quality fertilization, the general use of livestock manure per mu 200 to 300 kg or 100 kg of human waste. After the fish fry under the pond, the amount of fertilizer is determined according to the conditions such as thin water, weather, water temperature, and fry growth. Generally, 50 to 70 kg of fermented manure is applied per mu and the whole pool is splashed. Grass pulp cultivation method: the water peanuts, water lettuce and other high-yield aquatic plants labeled as straw for raising fry, per acre cast grass pulp 50 ~ 70 kg per day, divided into two Quanchiposa. The fry can directly ingest part of the pomace particles in the straw, and the remaining large amount of straw pulp rapidly decomposes in the water and acts as a fertilizer. The key to improving the utilization of straw pulp is to make it small. Since water peanuts contain saponins, it is necessary to add 2 to 5% of salt when used, and it can be fed only after a few hours, and a small amount of evenly spilled methods are used. Fertilizer cultivation method: commonly used chemical fertilizers include urea, ammonium bicarbonate, and superphosphate. In the first 20 days before the fish ponds under the first base fertilizer, acres of urea 1 to 1.5 kilograms, superphosphate 2.5 to 3 kilograms. The method is to apply the fertilizer directly to the pond. After the fish fry under the pond, it is necessary to determine the amount of fertilizer according to the water quality, the weather, and the growth of the fry. When fertilizing the fertilizer, the whole pool should be sprayed evenly after the water is dissolved so as to prevent the fry from mistakenly treating the fertilizer particles as feed. Grass compost cultivation method: fish seedlings in the first 5 to 10 days per mu Mu Shi grass 200 to 400 kilograms, respectively, piled up in the pool, decay after culturing plankton. 6 to 8 days after the fry hatchling, 150-200 kilograms of green grass is added for top dressing per acre. China Fisheries News