The cultivation of fish species in the autumn is a critical period in relation to the growth of the species. Through the autumn cultivating, the species of fish can grow and grow, and the survival rate of overwintering can be improved. The fish species Qiu Pei should grasp the following aspects:
1. Liqiu to Bailu is the stage of changing fingerlings of fish, and the amount of feeding should be strictly controlled so that 80% of the fish can eat. Grass carp, group head carp pay attention to add fresh green feed, such as duckweed, etc.; herring should be added broken crushed snails, razor clams, oysters, etc.; main oysters, squid pond water should be moderate, general water transparency to 25 to 30 cm should.
2. After the autumnal equinox, although the water temperature has decreased, it is still one of the best periods for the growth of fingerlings. Therefore, feeding should be strengthened. For food-eating fish, sufficient palatability should be put in order to make the fish eat well. In addition to ensuring appropriate fertilizers and water, bran and squid should also be fed with appropriate amounts of bran, rice bran, crushed cakes, etc. to supplement the shortage of natural food.
3. Before and after the frost fall, the temperature should be reduced. Feeding the concentrate should be added to facilitate the growth of the fish and facilitate the wintering of the fish species. Green feed should be reduced as appropriate, and the amount of fertilizer applied in fish ponds should also be reduced. Concentrate feeds account for 3% of the total weight of the fish. The water temperature dropped below 10Â°C. Feeding should also be insisted on and should not be stopped prematurely.
Second, timely adjustment of water quality
In the early autumn, when the water temperature is high and the weather is changeable, the water quality is prone to change, and it is difficult to control. Therefore, water exchange should be strengthened. In order to prevent oxygen shortage in fish ponds, the water is changed once a week. Before and after the autumnal equinox, the weather becomes cooler and the water quality must be kept fresh. , To prevent water quality aging, generally 7 to 10 days, changing the water once, or according to the specific conditions of the pool water to keep abreast of the water quality, live, tender and cool. The water clarity of the ponds of carp and squid pools is preferably 20 to 25 cm, and the water transparency of other ponds is 25 to 30 cm.
Third, timely prevention and treatment of fish disease
Early autumn is a season of high incidence of fish diseases. At this time, special attention should be paid to the prevention and treatment of fish diseases so that disease-free prevention can be achieved and diseases can be treated early.
1. Remove residual baits and dirt in time to prevent water pollution and contagious diseases.
2. Regularly sterilize the food field, regularly sprinkle bleaching powder, or use copper sulfate, ferrous sulfate hanging bag or hanging powder to control fish disease.
3. Sprinkle quicklime on a regular basis to both regulate water quality and prevent fish diseases.
4. Pay attention to the patrol pond and find timely treatment of fish disease.
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