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This method is highly beneficial for improving the ecological conditions of ponds, boosting productivity, lowering production costs, and increasing economic returns. The main technical guidelines are as follows:
1. When the water depth in the pond reaches 1 meter, apply 3,000 to 3,750 kilograms of quicklime per hectare across the entire pond. After a period of 7 to 10 days, the pond can be stocked with fish and turtles. This lime treatment helps disinfect the water and improve soil quality, creating a healthier environment for aquatic life.
2. Stocking should include a variety of species. For example, you can introduce 4,500 squid (20–25 g/tail), 1,200 squid (25 g/tail), 1,800 grass carp (50–125 g/tail), 1,200 squid (25 g/tail), 1,200 small turtles (12.5–25 g/tail), and about 18,000 turtles aged 3 to 6 years. Fish stocking should be done before the Spring Festival, while turtle stocking should occur when the water temperature stabilizes above 15°C after spring. With proper management, this system can yield approximately 3,000 kg of fresh fish and 1,500 kg of turtles per hectare annually.
3. Feeding practices require attention. Turtle feed and fish bait should be provided separately, starting with fish food followed by turtle food. Place the bait on feeding tables or in shallow areas near the pond’s edge. After feeding, remove any leftover food promptly to avoid water pollution and disease outbreaks.
To ensure effective turtle management, adult turtles and hatchlings should be kept in separate ponds. This prevents cannibalism and allows for more controlled feeding. Small turtles should be raised in smaller, more manageable ponds until they grow large enough to move into larger pools. Regular water changes are essential to maintain clean and healthy conditions.
Additionally, it's important to secure the pond’s inlet and outlet with wire or plastic mesh to prevent turtles from escaping. When changing water or feeding plants, avoid using pesticides that could poison the turtles. Also, never mix turtles with cockroaches, as they may attack the turtles. Finally, take measures to block rat and ant holes to prevent predators such as snakes, water rats, and wild cats from entering the area.
By following these practices, pond owners can achieve sustainable and profitable aquaculture while maintaining a balanced ecosystem.