The autumn climate is cool, the water temperature is appropriate, the fish eat well and grow rapidly, it is the key stage to seize the high yield of aquaculture ponds. The management of autumn fish ponds must be paid attention to in production.
1, reasonable feeding
According to the fish's stocking density, survival rate, and growth weight gain and feeding conditions in the previous stage, the total weight of fish in ponds was estimated. The total fish pellets were fed at a ratio of about 3% to 5% of the fish's body weight. Feeding 4 times, the actual amount of feeding according to the fish's food, weather, water temperature, flexible control, with 80% of the fish to eat without leaving residual bait is appropriate.
2, regulate water quality
In autumn, with the growth of fish, the amount of feeding is increasing, and the metabolites of fish are also increasing in the water body. The toxic substances such as ammonia and nitrogen in the water body will increase. Therefore, the management of the pool water in the autumn should highlight a “diligence†word. That is, we must constantly change the water, ground testing, and ground adjustment. The specific approach is:
One is to change the water once every 10 to 15 days, changing the water every time 20 to 30 centimeters, and adopt the method of first row and later injection.
The second is to apply 1 quicklime to regulate water quality every half a month or so, and use about 15kg of lime per acre.
The third is to use the water quality analyzer to check the water quality every 2 to 3 days, and timely grasp the status and dynamics of various physical and chemical factors such as ammonia nitrogen, hydrogen sulfide, nitrite, dissolved oxygen, pH, and water temperature in the water to provide a scientific basis for water quality regulation. .
The fourth is to apply microbial preparation once every 15 to 20 days so that the beneficial bacteria in the pool water are always in a dominant state.
3, prevent diseases
Fall is the season of fish enteritis, fulminant bleeding, and a variety of parasitic diseases. In addition to doing a good job of water quality control and reasonable feeding, the compound microbial preparation or multivitamin baits are fed once every two months, and the body surface, ankles and internal organs of the fish are regularly observed, and abnormal conditions are detected and used for drug control in time.
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