In order to fully utilize the potential of pond farming, increase yield, and improve economic efficiency, a high-yield aquaculture project was implemented from April 2005 to February 2006. In a 36-mu aquaculture pond, an average yield of 3,700 kg per mu was achieved, with a profit of 12,000 yuan per mu. The results were very promising, and the following high-yield aquaculture techniques are now being shared for reference.
First, the original pond was divided into two separate sections. A loader was used to remove mud from the bottom, deepening the pond to increase water storage capacity, allowing an average depth of 1.8 meters. Additionally, more than 500 meters of 60 cm by 80 cm three-dimensional light ditches were built, enabling direct water flow into the fish pond. A mesh fence was installed around the perimeter to prevent theft.
Second, the pond was equipped with essential hardware facilities, including a 3 kW power generator, six aerators, and three automatic feeders to ensure smooth operations and efficient management.
Third, preparation before stocking included disinfection. About 15–20 days before stocking, the pond was drained, and quicklime (80–100 g/m²) was spread on the bottom. After refilling with 20–30 cm of water, the mud was stirred with a rake to ensure thorough disinfection before introducing the seedlings.
Next, water quality was trained for 7–8 days. When the water clarity reached 20–30 cm, and the color turned yellow-green or yellow-brown, it indicated sufficient natural bait, making it suitable for stocking.
On April 8, 2005, 3.2 million fish were released, followed by 45,000 tilapia a week later. By early May, 2,400 carp fry weighing 0.1 kg each were added.
Daily management involved round-the-clock supervision, regular patrols, and checks on drainage systems to ensure unobstructed water flow. Residual feed was monitored to adjust daily feeding amounts, and oxygen levels were checked in the evening to avoid hypoxia. Sick or dead fish were promptly removed, and appropriate measures were taken to control diseases.
Feeding followed the "four rules": timing, quality, quantity, and location. Feed quality was ensured, and the amount was adjusted based on the fish's consumption. Feeding locations remained consistent to maintain feeding habits.
Fish were sold according to their growth stage, with large fish harvested early to maintain optimal density in the pond.
Feed was self-prepared using a custom formula, with a protein content of 32%. The daily feeding rate was 3%–5% of the fish's body weight, depending on weather and feeding behavior. Automatic feeders were used for distribution.
Disease prevention followed a "prevention-first" approach. Water was disinfected regularly—30 days after stocking, then every 15 days, and again after 20 days. Disinfectants such as bromine compounds, chlorhexidine, dibromohydantoin, chlorine dioxide, and potassium permanganate were used. Vitamin C and E were also added to the feed for immune support.
Financial analysis showed that total investment amounted to 699,000 yuan, including 33,000 yuan for pond operation, 6,000 yuan for fry, 25,000 yuan for depreciation, 200 tons of feed at 2,850 yuan/ton, 570,000 yuan, 35,000 yuan for labor, and 30,000 yuan for other expenses.
The total revenue from sales was 1.138 million yuan, with 44 tons of fish sold at an average price of 9.5 yuan/kg for grass carp and 7.5 yuan/kg for common carp. An estimated 95 tons of fish were still in the pond, valued at 8 yuan/kg, totaling 760,000 yuan.
This resulted in a total profit of 439,000 yuan, translating to 12,000 yuan per mu.
In summary, this project successfully achieved high and stable yields. Key factors included adequate water supply, reasonable feed formulation, scientific management, and complete infrastructure. These practices proved effective in enhancing productivity and profitability in aquaculture.
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