Key techniques for breeding fish species in autumn

The water temperature in autumn is suitable, which is a good season for the rapid growth of fish species. It is very important to grasp the cultivation of fish species in autumn. The key techniques of cultivating fish species in autumn are as follows:

1. Clear the pond

After 3 months of fish breeding, the water quality of the ponds was aging, the natural bait decreased, and the harmful substances and pathogens increased. Therefore, after entering autumn, the fish species should be transferred to the pond which has been cleaned and sterilized for cultivation. Under the condition of relative shortage of water sources and fish ponds. All the fish species can be transferred out of temporary culture, and the original fish ponds can be disinfected with quicklime 75Mu / mu. The water quality can be fattened according to the conventional method, and then the fish species will be transferred back to the original fish ponds when the medicine disappears.

2. Separate cultivation

Large size fish species have large food intake and strong grabbing power. If small size fish species are put at the same time, the physique of small size fish species will decline because they do not get enough bait. Fish species of more than 16 centimeters can be cultured in adult ponds, and small ones can be cultivated in special ponds.

3. Sparse

According to the size of the water surface, water depth, water source conditions, reasonable thinning to promote the growth of fish species. In a pond with a general water depth of 1.5 meters, there are 6000 fish fry with a depth of 7 mures and 8 centimeters per mu. By the end of the year, the body length can reach 13 murals and 16 centimeters.

4. Bait

In the fry ponds where herbivorous carp are mainly raised and silver carp and bighead carp are matched, green fodder is mainly used and concentrate is properly fed. Every ten thousand grass carp fingerlings are fed with duckweed, tender upland grass or aquatic plants 80ml 100kg per day, and concentrate 1.5ml 2.5kg. First put in green feed to avoid grass carp competing with other fish for food. The fish ponds for mixed culture of silver carp and bighead carp should be fertilized regularly, applying 80Mel 120 kg of fermented human and animal manure per mu for 15 days. The transparency of the pool water is maintained at 30m / 35cm. 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 is applied every 5 Mu every 10 days, 80 kg per mu of mature human and animal manure, and 4 kg of concentrate feed per 10,000 fish every day. For grass carp, 80ml / 10,000 grass carp were fed with 100 kg of green feed before putting in concentrate feed. The transparency of the pool water is maintained at 25m / m 30cm.

5. Patrol the pool

During the period of fish breeding, we should patrol the pond every day, observe the feeding and activities of pond fish, pay attention to the change of water quality, change new water frequently, and add new water once a week. The food farm should be cleaned, remove the residual bait and grass residue in time, sprinkle 0.5 kg of bleach around the food farm every semimonthly, or hang baskets or bags of other drugs, or feed the bait regularly, preferably once a month, for 3 days at a time, and diagnose and treat the diseased fish in time.