Ten precautions in the peak growing season of adult fish

A, anti-hunger adult fish in the growth season, food intake is large, should be more feeding feed. To grass, crucian carp, tilapia, etc. -based fishing pond, to throw bran, cake, bean dregs and other mixed feed and tender grass, plant stems and leaves and other fresh feed. Under normal circumstances, the daily coarse feed accounts for 10% of the total fish in the pool.

Second, the amount of fertilizer required for fish in the growth season of fertilizer deficiency accounts for 80% of the fertilizer that should be applied in the whole period. Therefore, every 5 to 7 days, 60 kg to 100 kg of fully fermented human and livestock manure and 2 kg to 3 kg of nitrogen and phosphorus fertilizer should be applied per mu.

Third, the water temperature is too high, the suitable growth temperature of fish is 23℃~39℃, in the high temperature season, in order to prevent the water temperature from being too high, new water must be poured in time, the fishing pond with a water layer of about 1 meter, and 1/10 of new water should be added every day.

Fourth, anti-hypoxia summer, fish oxygen consumption, coupled with a large amount of fertilizer and organic matter decomposition, easy to cause hypoxia. Therefore, aeration equipment should be installed. In places where there is no aeration equipment, new water should be poured according to the proportion of 10% of pond water, supplemented by artificial aeration.

Fifth, anti-floating head Due to the hot weather, the water pressure is reduced, and the fish swarm on the water surface to breathe, this is the "floating head". According to the cause and weight of floating head, targeted measures should be taken, such as floating head caused by large amount of bait, timely oxygenation and new water injection, but also mu with 6 kg lime or 2 kg alum or 2 kg salt, dissolved after sprinkling; clean water debris, residual grass, floating foam, etc.

VI. Prevention of "anti-water" anti-water is also called clear water disease, which occurs mostly in clear water ponds at the bottom of sand with too long rainy time. Originally a pool of fat water, often overnight become "crystal clear". The main reason is that there are many large zooplankton such as fleas, cladoceras and copepods in the fishing pond, which eat a lot of phytoplankton. In addition, the new water in the pond is too large in rainy days, which destroys the ecological balance in the pond. Effective prevention measures are: increase bighead carp, tilapia, control the number of zooplankton, with 9% crystal trichlorfon solution splashed, combined with artificial fertilization, the pool water will soon become fertile.

7. Anti-aging of water quality Due to high temperature, fish growth is fast, and the quality of pond water will change from slightly alkaline to acidic and aging, seriously affecting the reproduction of natural bait, reducing photosynthesis and inhibiting fish growth. Should be every other half month, mu with quicklime 20 kg, dissolved after the whole pool evenly splashed.