In recent years, some aquaculture farmers have disputes on the polyculture of fish and ducks. Some think that fish and ducks are well-mixed and can promote the double harvesting of fish and ducks. Others believe that the polyculture of fish and ducks will affect the yield of fish, which is not worth the candle. In fact, if fish and duck are mixed or not, the key is to have no law. How can fish and duck polyculture be counted? (i) It is appropriate to stock fish species. In the fish-duck mixed ponds, tilapia should be used as the main source, followed by filter-feeding eel, eel, omnivorous eel, and squid. Grass carp, because of its love for quiet water, should be kept or put less. (b) Do a good job of fish pond drainage system. After ducklings in fish ponds, duck dung can easily cause excessive water quality. In this way, it is easy to infect a fish or cause pans. Therefore, regular injection of fresh water into fishponds is required. If the irrigation and drainage system is not good, the water will not fill, and the fertilizer and water will not be discharged, which will affect the normal growth of the fish. (iii) Pay attention to changes in water quality in fish ponds. According to the quality of fish ponds, the stocking density of fish and ducks should be appropriately adjusted. When the transparency of fishpond water quality is maintained at 15-25cm, 2500-2700 tails of various fish species can be stocked and 200-300 ducks can be stocked. If the transparency of water quality is reduced, it is necessary to inject fresh water in time, usually every 7-10 days. (d) Observe duck dung regularly. If undigested nutrients are found in the duck droppings, feeding should be suspended, which can save feed and prevent excessive water quality. (e) Strengthen the prevention of fish diseases and duck diseases. In fish ponds, one kilogram of bleaching powder or 15 kilograms of quicklime can be used evenly. For ducks, the vaccine should be injected regularly. It is necessary to regularly disinfect the duck houses to prevent the introduction of duck pathogens into the water and indirectly infect the fish. Many practices have proved that it is entirely possible for fish and duck polycultures to win both fish and duck harvests.
Dried Fruit Nuts Co.,Ltd , http://www.chdriedfruits.com