How to increase the yield of fish culture in ponds

In recent years, due to the influence of market prices, many fish farmers have little profit, and even a loss phenomenon has occurred, which seriously affects the enthusiasm of farmers.

1. Thoroughly disinfect the pond and apply sufficient base fertilizer at one time.

Before fish species enter the pond, dredge the drainage channel and remove excessive silt from the pond. When the water depth is 20 cm, each mu of fish pond is disinfected with 100 kg of quicklime in water to kill pests, germs and microorganisms, and then 500 kg of decomposed human and animal dung is applied as base fertilizer. Then store water 2~2.5 meters deep, wait for 1 week after the drug disappears and then release fish.

2. Increase stocking specifications and put in "two species"

Large-sized fish species have high survival rate, large absolute increase, and can ensure the commodity specifications of the pond. Therefore, the best stocking specifications are 200~ 400g grass carp, 100~ 300g silver carp and 50~ 150g carp.

3, reasonable mix mixed culture, the implementation of three-dimensional fish farming

In order to make full use of the water space and natural food, it is necessary to culture "fat fish" such as silver carp and tilapia and "food fish" such as grass, carp and carp according to the upper, middle and lower layers. 1200~1500 fish species were bred per mu, of which 40% were grass carp, 40% were silver carp and bighead carp, 20% were carp, crucian carp, bream and tilapia. The total stocking amount per mu was about 150 kg.

4. Feed mixed feed and insist on fine tube

According to the physiological and living needs of fish, wheat bran, rice bran, bean cake flour, distiller's grains, minerals, vitamins and fish medicine are used to make compound feed to improve the feeding efficiency. 1500 kilograms per acre per year. At the same time, planting ryegrass, Sudan grass, salvaging fine green duckweed, duckweed to raise grass carp, feeding 2~3 times a day.

5, timely application of topdressing, culture of natural bait

When the temperature is low, it is advisable to assault the fertilizer water to cultivate plankton suitable for feeding "fat fish" and promote the rapid growth of silver carp and bighead carp. Apply topdressing every 2~3 days, and apply decomposed human and livestock manure 100~150 kg per mu each time. Summer temperature rises, apply farm manure easy to flood pool, can change to apply chemical fertilizer, every 5~7 days apply once, each time apply chemical fertilizer 2.5~5 kg per mu.

6. Capturing specification fish species, catching large and keeping small fish species by stages

Scientifically design the stocking, interbreeding, intercatch times and quantity of fish species, implement rotation of catch and release, catch large fish three times a year, catch 500~600 kg, achieve balanced listing, and the rest fish will be taken out of the pond after autumn. At the end of July, the small fish species of 6~10 cm were bred to prepare for the cultivation of large-sized fish species in the second year.

7. Take turns to sprinkle drugs to prevent fish diseases in time

During the high temperature period, 10 kg of quicklime or 250~350 g of 90% crystal trichlorfon are used to mix slurry and sprinkle every half month, and bleaching powder or copper sulfate and ferrous sulfate baskets are hung on the floating bait platform of fish to disinfect the food field. During the epidemic season of enteritis in grass carp, 0.5 kg garlic head and bait were mixed for every 100 kg grass carp for 3~6 days to prevent enteritis in grass carp.