After entering the fall, the water temperature gradually decreased, and the water turned thick. For aquaculture ponds, the fastest growing period of cultured objects during the season was the high incidence of disease onset and floating ponds. Therefore, it is of great significance to effectively handle the feeding and management of this season, and to increase the production of aquaculture ponds and ensure high yield and good harvest. For the scientific management of the culture pond in autumn, we should focus on these aspects
First, reasonably regulate water quality.
1. Add new water. Fill new water every 5 to 7 days, each time, change the amount of water 20 to 30 cm. The best time for water injection is at 12 to 14 o'clock in sunny days or 2 to 7 o'clock in the morning. Avoid water in the evening so as not to cause the fish to float. Inflow water should not allow industrial wastewater and pesticide-contaminated water to flow into the pool to avoid accidents such as poisoning or disease in the farm.
2. Reasonably use aerator. At 12 to 14 o'clock noon on a sunny day, the aerator is started, and the upper dissolved oxygen layer is sent to the lower layer to reduce nighttime oxygen deficiency. Correct use of oxygen aerators should adhere to noon on sunny days and not come in the evening; on cloudy days in the early morning and not open during the day; the principle of floating heads before opening, and rainy rains in the middle of the night, can effectively prevent the breeding body from floating and increase the appetite and disease resistance of the fishery. ability.
3. Spill biological agents. If the water quality of the water is poor or the water is inconvenient, you can choose sunny weather. Use pure spores every 7-10 days to regulate the water quality, reduce the harm of nitrite and other toxic and harmful substances on the fish, and reduce the incentives for the disease. . However, care should be taken not to use bactericides and insecticides immediately after spilling microbial preparations.
4. Dressing up algae. Adhere to the principle of timely and small number of times to see the shade of water cultured in time.
Second, to strengthen feed and promote rapid growth
In the autumn, the largest amount of feed was put in the ponds, and the total amount of feeds was over 40% of the total amount. After the beginning of autumn, the temperature gradually changes from hot to cool, and the water temperature is just suitable for the growth of the breeding body. Therefore, as long as the weather and the breeding body are normal and there is no risk of floating head, they must be fed in large quantities. However, before and after the dew exposure should pay attention to disease prevention, to properly control the amount of food. In October, the peak period of disease has passed and a large amount of feed can be fed. After November, the water temperature gradually decreased and the food intake of the breeding farms decreased, and the amount of feeding should be gradually reduced.
III. Disease Prevention and Control
Bacteria in the fall are prone to breeding, especially before and after the white dew, which is an epidemic season of disease. To do a good job of prevention and control, we must "prevent the main thing and prevent it from governing and remedy the problem." We must ensure that "one, two, three, four, and early cures." Clearly, it refers to the frequent clearance of diseased and dead fish breeding and residues in the culture pond to prevent the infection of pathogens and reduce the decay and deterioration of the residue. Second elimination refers to the frequent disinfection of the water body and the food field to improve the water environment. , refers to mixed baits in the feed for prevention or treatment, commonly used drugs are Baoganing, immune promotion long film; four extinction, refers to the eradication of aquatic insect pests and predators. Commonly used insecticides and water bugs, Shennong 6 + 1, etc.; early treatment, refers to the discovery of abnormal fish behavior, to take timely measures to timely diagnosis and treatment.
Falling aquaculture is likely to occur due to lack of oxygen floating head phenomenon, severe oxygen deficiency will overturn the pond, so every morning and evening, especially late at night, to strengthen the observation of the pond, in case of abrupt changes in the weather, pressure drop or continuous rain, especially to cause Pay attention.
Fourth, timely arrest, pay attention to daily management
After entering the autumn, if the amount of ponds in the pond is relatively large, it will easily lead to the onset of disease and floating ponds. At this time, timely fishing and listing will not only avoid the risk of breeding, but also help to achieve a balanced market, adjust the shortage, and accelerate cash flow. , improve the efficiency of bait, while at the same time can fully play the production potential of culture ponds and adjust the breeding density.
Daily management should pay attention
1. Qin tour patrol pond. It is necessary to stick to the patrol pond twice a day in order to find a timely solution to the problem. The “Four Looks†should be done when visiting the ponds: Firstly, look at the water color. The water color can be filled with new water. The water quality is aging. It needs to be adjusted with the water quality improver; secondly, look at the weather, the weather is hot or continuous cloudy, and the air pressure is low. Low dissolved oxygen in water, easy to produce oxygen-depleted flood ponds, to be prevented; Third, look at the feeding situation of the breeding body, fine weather, no major changes in the water color, the sharp decline in feed intake of the aquaculture, may indicate the imminent disease of the aquaculture, should take effective measures Treatment; four to see the activities of the aquaculture, such as the dispersion of the fish by the side, travel alone, travel is the performance of the disease, such as the discovery of a floating head in the evening, it is expected that there will be pan-tang later midnight or early morning.
2. Do a good job in environmental health. The first is to remove the pond's grass or stems, rods and other remnants in a timely manner. Second, the rotten and metamorphic bait should be promptly cleaned to prevent the occurrence of enteritis and cause other pathological changes. Third, the death phenomenon should be found and it should be timely removed and buried. Check the cause of death to prevent the spread of pathogens.
3. Make a management log. The management log should record three aspects of production, sales, and drug use for statistical analysis, timely adjustment of aquaculture measures, and accumulation of experience for the formulation of production plans and improvement of culture methods in the future.
These aspects are very important. Remember carefully. Usually do a good job. Basically you can maximally avoid farming risks! ! !
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