Cultivation technique of summer flower Pelteobagrus fulvidraco

1. Pond condition

Pond area to 1 mu is appropriate, water depth of 1.0 to 1.5 meters, rectangular, east-west direction. The bottom silt is not more than 10 cm, the pool ridge is strong and does not leak, and its height should exceed the highest water level by 0.3 to 0.5 meters. The bottom of the pool is flat and inclined to one side of the drain, the water source is sufficient, and the intake and drainage is convenient.

two。 Preparation of seedlings before stocking

20-30 days before fry stocking, dry the pond water, remove weeds and debris, and clean up the silt at the bottom of the pond. Add water 5cm to 10cm about 15 days before stocking, disinfect the pond with quicklime water, the dosage is 75kg per mu. The method is as follows: dig several small pits at the bottom of the pond, pour quicklime into the pits and add water, and sprinkle it evenly into the pond when a large amount of heat is released. The next day, iron rake was used to rake the sediment to fully mix the lime slurry and the bottom mud, so as to achieve the purpose of thoroughly cleaning the pond. 7-8 days later, add water after the efficacy disappears, and the influent must be filtered with a dense net to prevent enemy organisms from entering the pond with the water. Manure can be applied 1-2 days after adding water, 200-300 kg per mu to cultivate a large number of rotifers. Note that manure must be fermented before it can be used. When rotifers multiply in large numbers, the fish fry can go into the pond. If there are frog eggs, tadpoles and other enemy pests, they should be cleared in time.

3. Fish fry restocking

(1) the source of fish fry. The fry of Pelteobagrus fulvidraco is a high-quality species propagated in this field, which has been cultivated for about 10 days in the observation pond.

(2) Seedling release time. According to the number of rotifers in the pond, rotifers are chosen to go down to the pond at the peak, that is, water fleas are clustered but not red.

(3) stocking method. Since we collect the seedlings on the spot, we use sterilized buckets for short-distance transportation to the upwind bank of the pond, and pour the fry into the pond in water more than 2 meters from the side. However, if it is transported in an oxygen bag containing fish fry, it should be put into the pool water first, also 2 meters upwind from the shore, and when the water temperature inside and outside the bag is basically the same (usually about 15 minutes, the internal and external temperature difference is less than 1 ℃), the fry can be released. Usually, the fish fry are raised to summer flowers, with about 50,000 fry per mu.

4. Bait

After the fish fry were put into the pond for 2 or 3 days, the peak of rotifer was over, and the follow-up bait could be replenished. According to the fertility of the water, in the corner of the pond far from the inlet, a dense net is used to hang an appropriate amount of rotten fermented manure to continuously provide rotifers and a variety of large cladocera and copepods.

About 15 days after going down to the pond, the feeding habits of juvenile fish began to change and gradually transformed into omnivorous fish dominated by animal bait, which could be gradually domesticated and fed with artificial compound feed. The content of crude protein in feed is 39.5%, and the content of animal protein is about 70%.

At the beginning of domestication and feeding, four feeding tables were set up in the pond four times a day, which can be set at 6 ∶ 00, 10 ∶ 00, 14 ∶ 00 and 18 ∶ 00. The aged powdered feed was mixed with water and placed on the feed table to observe the residue of the feed and judge the feeding condition of the fish. When a large number of fish fry were fed, the feed table was reduced from 4 to 2, and located on the same side of the pond. Then after 2-3 days, it was reduced to 1, and fixed-point feeding was carried out. When the fry grows to 4 cm, it can be fed pellet feed with a diameter of 1 mm, and then gradually increase the feed size with the increase of fish body. at this time, the feeding times can be reduced to 2 times ∶ 9 ∶ 00 and 1 ∶ 3. At first, the bait was 1 kg per mu, and then gradually increased to 2 kg. The amount of bait should also be determined according to the specific conditions of the day, and the general principle is "four fixed" bait.

5. Daily management

Keep patrolling the pond every day, pay attention to the change of water quality, add or change water regularly, and keep the water body "fresh, fat, alive and cool". If lobster and other enemy organisms are found in the pond, they can be cleared in time and the crystal trichlorfon water can be sprinkled all over the pond. In addition, the fish should always be checked for fish diseases and timely prevention and treatment.

6. Result

After about 45 days of cultivation, the average body length reached 7cm and the survival rate reached more than 85% when the seedlings were netted and sold.