Scientific Management of Fish Pond in Autumn

The cool climate in autumn, the suitable water temperature, the exuberant feeding of fish and the rapid growth are the key stages to capture the high yield of culture ponds.

1. Reasonable input and feeding

According to the stocking density, survival rate, growth gain and feeding situation of the fish in the previous stage, the total weight of the fish in the pond was estimated, and the full price pellet feed was fed at a proportion of about 3% to 5% of the body weight of the fish, usually 4 times a day. The actual feeding amount is flexibly controlled according to the eating situation, weather and water temperature of the fish, and 80% of the fish is full without leaving residual bait.

2. Regulate and control water quality

With the growth of fish in autumn, the amount of feeding is getting larger and larger, the metabolites of fish are more and more in the water, and the toxic substances such as ammonia nitrogen in the water are increasing, so the pond water management in autumn should highlight the word "diligent". That is to change water frequently, detect and adjust frequently. The specific measures are as follows:

First, change the water once every 10 to 15 days, each time 20 to 30 centimeters, and take the method of drainage before injection.

The second is to apply quicklime about once every half a month to regulate water quality, with about 15 kilograms of quicklime per mu each time.

The third is to test the water quality with a water quality analyzer every 2 to 3 days, and timely grasp the status and dynamics of various physical and chemical factors in the water, such as ammonia nitrogen, hydrogen sulfide, nitrite, dissolved oxygen, pH value, water temperature and so on, so as to provide scientific basis for water quality regulation and control.

Fourth, microbial preparations are applied every 15 to 20 days, so that the beneficial bacteria in the pond water are always in a dominant state.

3. Prevention of diseases

Autumn is a frequent season for fish enteritis, fulminant hemorrhagic disease and a variety of parasitic diseases. It is necessary to achieve disease-free and early prevention. In addition to water quality control and reasonable feeding, compound microbial preparation or multivitamin bait was given every half a month, and the body surface, Gill and viscera of the fish were observed regularly.