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Fish and duck polyculture technical points
Fish and duck polyculture is a good model for comprehensive fish farming. On the one hand, ducks can take harmful organisms such as diseased fish and aquatic insect larvae to eliminate the adverse effects on fish growth. At the same time, duck droppings fall into the water, and a small portion is directly eaten by fish in the form of organic decay. Some of them are decomposed by the water and absorbed by the water body, which promotes the growth of plankton and increases the natural food of the fish, thereby increasing the yield of fertilizer fish. In addition, ducks swimming back and forth on the water surface, to some extent increased the density of dissolved oxygen in water, improved the water environment; fish and duck polyculture to solve the problem of duck droppings on the environment and other issues. The Junqiao Farm in Guazhou Township, Rongjiang County has adopted polyculture of ducks and ducks and has been engaged in comprehensive fish farming. It has achieved good economic and social benefits. Their main approach is: First, the polyculture of fish and ducks is generally used for adult or second-instar fingerlings, mainly for fish and fish, which accounts for 60% of stocking capacity, and is also used together with 40% of omnivores such as cockroaches, cockroaches, and oysters. fish. Second, strengthen water quality management to prevent the eutrophication of the water body, especially in the hot season, change the water frequently, and observe carefully. Every week, 20 to 40 kilograms of quicklime Quanchiposa, improve water quality, maintain transparency 25 to 40 cm, pH value 7.5 ~ 8.5, timely prevention and treatment of fish diseases. 3. According to the farming conditions, 60 to 100 ducks per acre of water shall be used to control the area of ​​duck activities not to exceed one-third of the surface of the water, and to be isolated. The height of the isolation net is 1 meter, each of which is 50 centimeters above and below the water surface. The duck canopy is per square meter. Four to five meters are designed. When connecting with the pool, bricks should be used to cover the ground and the slope should be small to prevent the pool from collapsing. Fourth, do not import diseased ducks from the affected areas, duck sheds, duck farms and other production tools can be used only after strict disinfection, ducklings below the age of 5 weeks to early injection of disease vaccine, prevent duck gizzard, duckling hepatitis, poultry and other common The occurrence of disease. Fifth, do a good job of catching rounds of fish and evenly go public to increase the commodity rate of fish.