ZHONGSHAN G.H.L. TRADING CO., LTD. , https://www.ghltrade.com
Pond management of annual production of two salmon
In recent years, the number of specialized households engaged in pond fish farming has been increasing. However, most of them only manage to raise one batch of fish per year. To achieve the goal of "two tons of fish per acre annually and two thousand kilograms of adult fish," it is essential to focus on improving pond conditions, scientifically stocking fish species, and maintaining consistent pond management practices. This approach can significantly enhance the efficiency and productivity of pond aquaculture.
To begin with, ponds should be selected based on size—ideally between 5 to 10 acres—with sufficient water supply and no pollution. These ponds should be properly prepared before introducing fish. Before stocking, the ponds must be renovated, dykes reinforced, and drainage systems improved to ensure efficient irrigation and drainage. The water depth should be adjustable according to different growth stages of the fish.
Before introducing fish species, the pond should be thoroughly cleaned. Ten days prior to the first stocking, 150 kg of quicklime per acre should be used to eliminate wild fish and harmful bacteria. After 2–3 days, fresh water should be added to a depth of 0.8–1 meter. For the second round of stocking, 10 kg of bleaching powder per acre is applied three days before the start of the second season, followed by water addition the next day.
The first batch of carp should be introduced before mid-March. A balanced mix of food-eating and filter-feeding fish should be stocked to maximize production efficiency. The recommended stocking density per acre is: 1,200–1,500 tails of 150–250 g/tail, 200–250 tails of 250 g/tail, and 80–100 tails of larger fish. The first batch of bream should be raised until June or July, reaching an average weight of 0.8–1 kg, yielding over 1,000 kg per acre.
After the first batch is harvested, the pond should be refilled with water, and the second batch of fish should be introduced by July 20th at the latest. The second stocking includes more than 1,500 tails of 25 g/year fish, 260 tails of 250 g/tail fish, and 90 tails of 200–250 g/tail fish. The second batch is raised until late October, with careful feeding and water level management.
Water depth should be maintained at 0.8–1 meter initially, gradually increasing to 1.5–2 meters by June. Regular water changes and liming are necessary to maintain good water quality. The ideal water condition should be “fat, tender, and cool,†with a transparency of 25–30 cm and a pH of 7–7.5.
During hot weather in late May, aerators must be used when fish show signs of floating. One aerator should be placed for every 5 acres. On cloudy days, oxygenation should be done in the morning; on sunny days, it should be done for 1–2 hours during noon. Each pond should have a feeding station extending 2–4 meters into the water.
Fish feed should be fresh, non-moldy, uniform in particle size, and high in nutrition to promote healthy growth. Fish should be dipped in a 1–2% saltwater solution for 5–10 minutes before being placed in the pond. In spring, 0.5–0.7 grams of trichlorfon per cubic meter of water should be used to prevent parasitic diseases.
Every half month in June, the entire pond should be treated with lime slurry. During periods of high disease incidence, bleaching powder should be used on clear days to prevent bacterial infections. Regular patrols of the pond three times daily—morning, afternoon, and evening—are essential. Detailed records should be kept to monitor fish behavior, feeding patterns, and overall health.
Next Article
Pond management of annual production of two salmon
Prev Article
Fish cake processing technology