By adopting a cost-effective fish co-cultivation technology, farmers can harvest 2000-3000 kilograms of fresh tadpoles and 100-300 kilograms of fish per mu, which represents a 50%-80% increase compared to traditional paddy fish farming methods. This method not only boosts productivity but also enhances the sustainability of the system.
Building fish ditches and nests is essential for creating an optimal environment for fish. These structures serve as both habitats and activity areas for the fish. The total area dedicated to these ditches should be at least 10% of the overall farmland, ideally 15%. The ditch depth should be around 1 meter, while the nest should be 2 meters wide and at least 1.5 meters deep. It's important that the ditches are connected to the nests for efficient water flow. In some cases, grass-mud ponds and water inlets can be used to create more permanent and stable ditch systems.
Improving the stocking structure is crucial for successful co-cultivation. As the lotus plants grow, they cover most of the water surface, reducing dissolved oxygen levels and limiting plankton availability. However, zoobenthos, aquatic weeds, and insects become more abundant. Therefore, it's recommended to stock fish species that are tolerant to low oxygen conditions and have varied feeding habits, such as oysters, clams, herring, tilapia, and squid. A small number of quail or other compatible species can also be introduced, but care must be taken to control their numbers, sizes, and feeding times to avoid damaging the lotus roots.
Rational fertilization plays a key role in maintaining the health of the ecosystem. In Putian, urea and ammonium bicarbonate are commonly used, applied before the lotus leaves start to grow. Each acre typically receives 25-50 kilograms of fertilizer. To minimize the impact on fish, a half-side, half-side application method can be employed, ensuring that fish are not directly exposed to high concentrations of nutrients.
Diversified farming techniques, such as "Yu-ping fish type," "fish rotation," and "squid and fish" systems, help optimize resource use. The "Yu-ping fish type" involves growing duckweed in shallow water and raising fish in deeper areas, where duckweed serves as natural feed. This approach provides rich biological feed and a favorable habitat for fish. Additionally, fish waste acts as a natural fertilizer, contributing to a sustainable recycling system within the farm.
Effective management is vital for long-term success. Regular checks of fishing equipment are necessary to prevent fish from escaping. Maintaining cleanliness by promptly removing leftover bait is also important. Fresh water should be added regularly to keep the water level consistent in the ditches. Fertilizer application must consider the needs of both the fish and the crops.
In addition, it's recommended to regularly apply bleaching powder and feed garlic, leeks, and furazolidone to enhance fish health and disease resistance. These practices contribute to a more resilient and productive aquaculture system, ensuring better yields and environmental balance.
Frozen Bonito Tuna Skipjack Products
Frozen Bonito Tuna Skipjack Products,Flash Frozen Tuna,Cooking Frozen Tuna,Freezing Fresh Tuna
Zhoushan City Shuangying Aquatic Products Co., Ltd.  , https://www.shuangying-aquatic.com