Why do fish farming in rural areas turn over ponds? What are the countermeasures?

"turning over the pond" of fish farming in rural areas means that more than half a year of hard work has been wasted, and many people are fishing for fish while crying. So why do fish farming in rural areas turn over ponds? What are the countermeasures?

I. reasons for overturning ponds in rural fish farming

1. Abnormal weather leads to overturning the pond.

(1) rainstorm weather: strong sunshine during the day, but sudden thundershowers around evening, or days of overcast and rain without sunshine.

(2) muggy weather: it thundered for a long time but did not rain, the wind was small, the muggy pressure was low for days, and the weather turned overcast after long sunny days; third, the strong wind weather: the weather was sunny and the temperature was high during the day, and the wind turned northerly at night, and the temperature dropped rapidly. This kind of weather is more common in autumn.

2. Mismanagement leads to overturning the pond.

Mainly in the adult stage, a sudden power outage was not found, and the opening of the aerator was not found in the case of hypoxia, and similar cases of turning over ponds often occurred in aquaculture production.

II. Countermeasures for turning over ponds in rural fish culture

1. Water quality treatment should be carried out in advance in case of abnormal weather

In the case of abnormal weather, water quality regulation should be carried out in advance to improve the dissolved oxygen and anti-stress ability of the water body, such as using Tongwei Golden Peptide, Water improvement and detoxification Bao, oxygen enhancer, sodium humate and other aquatic products, and some new water should be added in advance if possible.

2. Pay attention to the pond management before and after turning the pond

(1) when the weather is abnormal, the amount of feed should be controlled to avoid increasing the oxygen consumption of water body.

(2) in case of abnormal weather or rainstorm, check whether the aerator, power supply and circuit are normal, so as to avoid sudden accidents.

(3) Reserve disinfection and oxygenation products in advance to prevent accidents, especially oxygenation products, which can be used every 5-8 hours in cases of severe hypoxia.

(4) in the event of dead fish turning over the pond, the dead and diseased fish should be fished out in time and treated innocuously to avoid the breeding of pathogens.

(5) take reasonable disinfection measures and choose disinfection products with less irritation after overturning the pond.

(6) under conditional conditions, discharge the bottom water during the rainstorm, and do a good job of escape prevention at the same time.

(7) pay attention to maintain the rational use of the aerator, and the micropore aeration can be opened for 24 hours.

3. Strengthen daily prevention management.

(1) do a good job in clearing the pond to avoid the existence of a large amount of organic matter at the bottom of the pond.

(2) strengthening daily management of water quality: regular management of pond sediment and water quality, regular use of Bacillus, photosynthetic bacteria and water culture products, such as feed companions 1, 2, 4, as well as gold peptides and lactic acid bacteria, to maintain a reasonable algal and bacteriological phase of the water body.

(3) under certain conditions, the bottom water can be discharged regularly, or a bottom drainage system can be built, which can discharge 2-3 times a week to reduce the organic matter, residual bait and fish excreta in the bottom water of the pond and improve the purification power of the water body.

(4) strengthen the management of pond oxygenation: reasonably equip the pond with oxygenation equipment, 2000 jin / mu pond, every 3-5 mu is equipped with 3kw aerator; at the same time, strengthen the feeding area to increase oxygen, 10-20 mu pond is equipped with 2.2kw micro-hole oxygenation, 60 oxygen plates are placed in the feeding area, and in the peak period of breeding, the use mode of "12 hours" is strictly followed: 12 hours at night, 5 hours when feeding during the day, and all-day use when lack of oxygen.