Rapid fry cultivation
Straw culture method. Water peanuts, water lettuce and other high-yielding aquatic plants are used as grass pulp to raise fry, and 50-70 kilograms of straw are poured per acre per day. 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. Because water peanuts contain saponins, 2% to 5% of salt must be added during use, and they can be fed only after a few hours, and a small number of uniform spills are used.
Grass compost cultivation method. The Fish seedlings are weighed between 200 and 400 kilograms per acre in 5 to 10 days in front of the pond and piled up on the edge of the pond respectively. After rotting, plankton is cultivated. 6 to 8 days after the fry hatchling, 150-200 kilograms of green grass is added for top dressing per acre.
Manure cultivation method. In front of the fish seedlings, basal fertilizer is applied in front of the pond to fertilize the water quality. Generally, 200 to 300 kg of livestock excrement or 100 kg of human waste is used per mu. 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.
Fertilizer cultivation method. Common fertilizers are urea, ammonium bicarbonate, superphosphate and so on. 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.
Pollock Fillet,Petite Hake Fillets,Filleting Hake,Cape Hake Fillets
ZHEJIANG EVERNEW SEAFOOD CO.,LTD , https://www.evernewseafood.com