July to September is a critical period for fish feeding and production, making it essential to implement effective management strategies. Proper feeding, fertilization, water quality control, disease prevention, and timely harvesting are all crucial during this season. Here’s a detailed guide on how to manage fish ponds effectively:
First, feed appropriately. The main diet should consist of concentrated feeds such as fish meal pellets, soybean cakes, wheat bran, and rice bran, while green feeds like aquatic plants should be supplemented. The daily feeding amount should be 8% to 10% of the total weight of the fish in the pond. To maximize feed utilization, feed the fish at least four times a day. The feed must be fresh, free from mold, and suitable in size for the fish. Concentrated feeds should be placed in feeding areas, while green materials can be placed in floating frames. During hot summer days, avoid overfeeding in the evening to prevent fish from floating due to low oxygen levels.
Second, apply fertilizer wisely. In summer, high temperatures can cause rapid changes in water quality, so fertilization should be done in small quantities and frequently—about once every 5 to 7 days. Use mainly inorganic fertilizers and photosynthetic bacteria, with some organic manure like well-fermented pig or chicken manure. Apply 2–4 kg of nitrogen and phosphorus per acre, or 10 mg/kg of photosynthetic bacteria, along with 50–60 kg of fermented manure. If the water is too clear and the weather is good, you can increase the dose slightly. However, if the water is murky or the weather is bad, stop fertilizing and change the water immediately.
Third, maintain good water quality. High water temperatures and increased feeding lead to more waste, which can deplete oxygen levels. To prevent this, keep the pond depth at 2 meters or more, regularly add new water, and use lime (15–20 kg per acre) every 7–10 days to improve clarity and calcium content. Install aerators to ensure proper aeration and oxygenation, adjusting their use based on actual conditions.
Fourth, prevent fish from floating. Patrol the pond three times a day: early morning to check for floating fish, noon to monitor feeding and activity, and evening to assess food consumption and signs of distress. Remove leftover food and debris to prevent pollution and oxygen depletion. In hot or stormy weather, increase aeration, reduce feeding, and avoid fertilizing. If severe floating occurs, stop feeding and start oxygenation immediately. Adding yellow mud mixed with salt can also help restore water balance.
Fifth, conduct selective harvesting. In mid-to-late July, sell larger fish such as silver carp over 1 kg, grass carp over 1.5 kg, and introduce smaller species like carp (0.1–0.2 kg) for future stocking. At the end of August and early September, harvest fish that meet market standards. Fish during cool mornings to reduce stress and improve efficiency, helping to lower density and optimize feed usage.
Sixth, focus on disease prevention. Summer is a peak time for diseases like hemorrhagic septicemia, enteritis, gill disease, and others. Regular disinfection of feed, tools, and water is essential. Disinfect feeding areas with 0.5 mg/kg of strong chlorine extract every two weeks, and soak tools in 3% saline solution for five days every 20 days.
By following these practices, fish farmers can ensure healthy growth, maximize productivity, and minimize losses during the busy summer months.
Money Safe,Electric Fingerprint Safes,Bank Digital Fingerprint Safe,Big Fingerprint Home Safes
Ningbo Reliance Security Technology CO.,Ltd , https://www.reliancesafes.com