Duck ponds can produce 180 to 200 kg of fish per 667 square meters (1 mu) of water without increasing feed or fertilizer.

1. Select the water surface. Water pools with a water surface of 1333 square meters (2 mu) or more, adult fish ponds with a water depth of 1 meter or more, and fish ponds of 2 years old are suitable for rivers and lakes with suitable conditions. Slope protection should be built for sand and earthworms, soils with loose pools, and newly excavated fish ponds. Small shallow ponds (below 1 meter in depth) are not suitable for fish and duck because the ducks will stir the pond mud and cause drowning, causing the fish to float to the surface and be swallowed.

2. Feeding methods. The first is grazing: the ducks are scattered on the surface of ponds and lakes and are returned to the duck shed in the evening. This approach is conducive to large-scale fish farming, but also can save duck feed, but the effect on fish production is not. The second is the duck outside the pond: that is, a duck shed is built near the fish pond, and a cement activity field and activity pool are set up. Every day, duck dung and residual feed on the playground are washed into the pond. This way is easy to manage in a duck cluster. The third is polyculture of fish and duck: that is, a duck shed is built on the dike of the fish pond, and a part of the pool pond is used as an activity field to store the duck in the fish pond. This approach can give full play to the ecological effects of symbiosis and mutual benefit between fish and ducks, and is a common feeding method for fish and ducks at home and abroad.

3. Collocation method: polyculture of ducks and ducks. It is appropriate to put 100 ducks per 667 square meters of water; if grazing, increase it to more than 200. Should be mainly to raise oysters, clams, tilapia or clams, squid and other filter-feeding and omnivorous fish, and it is not appropriate to stock grass carp, head bream or herring. There should be no more than 250 fish ponds per 667 square meters, otherwise fish production will decline significantly. With an annual output of 40 kg to 50 kg for each duck, the duck pond can increase 4 to 5 tons of fertilizer per 667 square meters. These fertilizers can fertilize the pond water, promote the reproduction of plankton, and provide ample food for maggots and squid. Duck-fish ponds, such as eel and squid, can be used for every 667 m2 of fish, ranging from 50 kg to 75 kg, and about 1,000 to 1,500 fish.

4. Strengthen management. In order to facilitate the centralized management of ducks, old fish nets, screens, and other materials can be used to surround a part of fish ponds as a duck activity pool. It is advisable to keep 2 to 4 ducks on 1 square meter of water. The height of the mesh is 40-50 cm above and below the surface of the water, so that the fish can freely enter or leave for food, even if the nesting of small fish can reduce losses. In the morning, the ducks were released from the shed. After the quail eggs, duck droppings were swept into the pool. In addition, we must pay attention to changing water and oxygen. In summer, the ducks have a large amount of dejecta and the water quality is too fat. It is necessary to add new water and reduce the amount of fertilizer.

Strengthen management. In order to facilitate the centralized management of ducks, old fish nets, screens, and other materials can be used to surround a part of fish ponds as a duck activity pool. It is advisable to keep 2 to 4 ducks on 1 square meter of water. The height of the mesh is 40-50 cm above and below the surface of the water, so that the fish can freely enter or leave for food, even if the nesting of small fish can reduce losses. In the morning, the ducks were released from the shed. After the quail eggs, duck droppings were swept into the pool. In addition, we must pay attention to changing water and oxygen. In summer, the ducks have a large amount of dejecta and the water quality is too fat. It is necessary to add new water and reduce the amount of fertilizer.

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