Autumn management of fish species

The water temperature is suitable in autumn, which is the peak season for the growth of fish species. The following work should be done well in the management of fish species in autumn.

1. Clear the pond in time.

After 2-3 months, the water quality of the ponds tended to be aging, the natural bait decreased, and the harmful substances such as hydrogen sulfide and pathogens increased. After entering autumn, the fish species should be transferred to the pond which has been cleaned and sterilized for cultivation to purify the culture environment.

2. Scientific bait.

Due to the suitable climate in autumn, large food intake and rapid growth of fish species, the supply of bait must be ensured. The fry ponds mainly composed of herbivorous fish and silver carp and bighead carp should be fed green bait and concentrate properly. Every ten thousand grass carp are fed with duckweed and tender grass 70-90 kg and concentrate 1.5-2.5 kg every day. The mixed fish ponds of silver carp and bighead carp should be fertilized once every 10-15 days, and 70-90 kg of fermented human and animal manure per mu should be applied to keep the transparency of the pond water at 30-35 cm. The fry ponds with silver carp and bighead carp as the main species and grass carp should be fertilized and supplemented by bait. In addition to applying base fertilizer, topdressing was applied every 5 to 10 days, and 80kg of mature human and animal manure was applied per mu. Every ten thousand fish every day, the concentrate feed is 2kg, and the green diet is 50kg.

3. Separate cultivation management.

Fish species should be reared reasonably according to different specifications, so that the specifications of fish species in the same pond are the same. Fish species of more than 16 cm can be placed in adult fish ponds, and small fish species need to be cultivated in special ponds so as not to cause competition for food.

4. Patrol the pool regularly.

During the period of fish breeding, we should patrol the pond every day, observe the food intake and living conditions of fish, pay attention to the changes of water quality, change new water frequently, and add new water once a week. And often clean the food farm, get rid of the residue bait in time, sprinkle 0.5 kg of bleaching water around the food farm every half a month, and feed the bait regularly, twice a month for 3 days. When diseased or dead fish are found, they should be fished out and buried in time.