Technique of monoculture of Pelteobagrus fulvidraco in pond

First, pond preparation

The fish pond is rectangular, east-west, with an area of 1.5 mu, a water depth of 1.5 Mu, convenient drainage and irrigation, and is equipped with a 1.5 kilowatt floating water spray aerator. The bottom of the pond is flat, less silt and easy to catch. 10 days before the fish went into the pond, the water was disinfected with 100 kg of quicklime per mu. Three days later, 200 kg of fermented pig manure was applied per mu, and the pond water was filled to 1 meter deep. The inlet is filtered with 60-mesh silk cloth. Pull the empty net with the summer flower net the day before the pool.

2. Fish fingerling restocking

1. Fish fingerling preparation

The fish species are taken from the artificially bred Pelteobagrus fulvidraco (also known as Pelteobagrus fulvidraco). When the fish fry are cultured with water fleas to 1 cm, they are fed with live water earthworms, which can reach 2 cm in 5 days. At this time, fish paste is fed instead. At the same time, a little soft-shelled turtle feed is added to the pellet feed to make a paste. After 20 days of feeding, the fish can grow to 5cm and then go into the pond.

2. Fish restocking

4000 tails per mu, a total of 6000 tails, were soaked in salt water for 5 minutes. Ten days later, 300 silver carp and 100 bighead carp fingerling with a tail weight of 75ml / 100g and 100 bighead carp fingerlings were stocked.

III. Feeding and management

1. Feed feeding

A 2-meter bait table is set at the eastern end of the fish pond along the edge of the pond, 30ml 40 cm away from the bottom of the pond. Fish paste and feed leachate were fed for 3 days. After the fish were fed on the bait table, the fish paste was stopped and the crushed feed was fed instead. The daily feed intake is 3% of fish body weight, once from 9 am to 10:00 and from 3 pm to 5 pm, and fed with 1x3 in the morning and 2max 3 in the afternoon. When casting bait, "four fixed, four look", that is, look at the weather, water quality, water temperature, see the fish eating situation flexible grasp, and make a good production record.

2. Water quality regulation

Seven days after the fish were put into the pond, the pond water was added to a depth of 1.5 meters three times. Sprinkle with 8 kg of quicklime every 30 days or so. Add 10ml 15cm fresh water every 30 days or so, staggered with sprinkling lime water, and start the aerator at the right time to keep the water quality "fresh, alive and cool".

3. Prevention and treatment of fish diseases

In addition to sprinkling quicklime, hang bags around the bait table with germicidal king powder from June to October, 250 grams each time, and replace it every 10 days. Draw the net once a month to check the growth of the fish in order to adjust the amount of feed, combined with the removal of wild miscellaneous fish. Use the summer flower net when pulling the net, and try to avoid hurting fish spines when pulling in the net. After removing the wild, it was transferred to the fish fry cage, and the fish were sampled, counted and weighed. In order to prevent the fish from being stabbed by similar hard spines, the fish caught were bathed in salt water for 5 minutes, and the effect was very good. Sensitive drugs such as trichlorfon and trichlorfon shall not be used.

IV. Harvest

June 4 Pelteobagrus fulvidraco under the pond, December 11, fishing dry pond, a total of 217 kg of Pelteobagrus fulvidraco, tail weight 45Ru 80 grams, mostly about 65 grams. The total feed loss was 564 kg and the feed coefficient was 2.6.

5. Experience and discussion

The cultured Pelteobagrus fulvidraco has high benefit and great production potential. If the prevention and control of fish disease is done properly, the fish pond can be disease-free all the year round. Strengthening domestication can change the night feeding habit of Pelteobagrus fulvidraco, facilitate production management and improve feed utilization rate. However, attention should be paid to the following aspects in culture:

1. The density should not be too high

The weather remained muggy and hot at the end of July. On the evening of July 26, the yellow croaker pond was seriously anoxic and flooded. Although it tried its best to rescue, more than 2000 fish died, which was the main reason affecting the yield. Therefore, the stocking density should be reduced, and it is appropriate to put 3000 tails per mu.

2. Feed composition

The protein content of the full-price feed is 33%, the crude fat content is 4%, and the nutrients are lacking, which affects the individual growth of Pelteobagrus fulvidraco. It is recommended to use full-price feed with a protein content of more than 36%, or supplemented with animal feed such as fish pulp and minced mussel meat, so as to strive to be bred and put on the market in the same year, shorten the production cycle and improve production efficiency.