Six Common Fish Breeding Methods
First, the soybean milk cultivation method This is our country's traditional method of fingerlings cultivation, in the fish pond after half a day began to feed soybean milk. Under normal circumstances, 1 kilogram of soybeans can be ground into 15 kilograms of soybean milk, and 1 kilogram of soybean cake can be ground into 10 to 12 kilograms of soybean milk. In the water temperature 25 Â°C ~ 30 Â°C conditions, the first soybean or bean cake soaked in water for 6 to 7 hours, when refining the soybean or bean cake and water at the same time to join, can not grind the milk and then dilute the ground soybean milk, otherwise It will precipitate and affect the feeding effect of fry. The ground soybean milk should be fed in a timely manner. Soak the soybean milk evenly to the surface according to the "three sides and two full ponds" feeding method. The development of 10,000 summer fish species requires 5 to 7.5 kilograms of soybeans or 7.5 to 10 kilograms of soybean cake.
Second, the cake powder cultivation method This method is the bean cake, cotton seed cake, peanut cake and rape cake and other cake raw materials ground into a dry powder directly after feeding, which is commonly used in northern China in recent years, the method of cultivation of fingerlings. There are many advantages to using this method. The dry material is easy to use and evenly spreads the dry powder on the surface of the water. The surface tension of the dry powder on the surface of the water is longer than that of soybean milk. The utilization rate of the powder is higher than that of soybean milk.
Third, the straw culture method will be a variety of aquatic plants or fiber grassland containing less pulp directly feed fish, this is a fine way to Qing Dynasty, a good source of bait. It is especially suitable for the cultivation of flower buds and whitefish fry (seeds). This kind of fingerling cultivation method can reduce the production cost by 15% to 20%. Every day Quanchipa splashes the grass pulp twice a day. Sprinkle 50-75 kilograms per acre of water every day, or 10 to 15 kilograms per 10,000-day fry. Sometimes the specific amount of straw fed can also be adjusted flexibly depending on the color of the water. Fry (species) can directly feed a part of the palatability granules in the straw, and most of the straw pulp is rapidly decomposed in the water and play a role in cultivating the natural food of the water body. The key to improving the utilization rate of straw pulp is to make fine grass pulp and adopt a feeding method that is less frequent and evenly spilled.
Fourth, manure cultivation method in the fish before the pond 4 to 7 days before the first base fertilizer, per mu of water applied cattle dung or human fecal urine 400 to 500 kilograms, used to cultivate fish eat natural food creatures. After the fish fry under the pond, the amount of fertilizer should be determined according to the water quality, fertilizer, weather, water temperature and growth of fry. Generally, 50-75 kg of manure is applied per mu of water. The use of manure to raise fry, the best method of mixing compost, manure fermentation decomposed, take its whole juice sprinkling.
V. Fertilizer cultivation method The use of chemical fertilizer to cultivate fish species is a new technique. From the effect point of view, the old pond is better than the new pond, and the pond with silt is better than the pond without silt. The commonly used chemical fertilizers include ammonium sulfate, urea and superphosphate. In the first half of the month under the fishery pond, 2.5 to 5 kg of ammonium sulfate and 5 to 10 kg of superphosphate are applied per acre of water surface. If there is no fish under the pond or the water is not fat, it should be topdressed once more. When topdressing, chemical fertilizers should be fully dissolved and sprayed evenly on the whole pool to prevent the fish from accidentally swallowing the chemical fertilizer particles as bait and die. Fertilizers have a single active ingredient and are best mixed with manure.
Sixth, the mixed cultivation method adopts the combined cultivation method of fertilization and feeding, which can give full play to the advantages of various cultivation methods. The specific approach is: 1 fish fry pond 3 to 5 days before the application of manure fertilization culture rotifers and other natural food organisms. If the water quality is not fat, a small amount of chemical fertilizers may be used. 2 A few days after the fry ponds are fed, 1.5 to 2 kilograms of soybean milk or 2 to 2.5 kilograms of cake powder will be fed every mu of water to make up for the insufficiency of natural food organisms. Fertilizers will be fertilized once every 3 to 5 days for each mu of water. The composted compost juice 150 to 200 kilograms.