What is the method of fish pond management in winter? These six points are very important!

In winter, most parts of our country are relatively cold, which is a headache for fish farmers, because if the management work is not done well, it is easy to damage the fish. So, what is the method of fish pond management in winter? These six points are very important!

1. Tamp the ridge of the pond to prevent leakage

Artificial fortification of the pond ridge, the soil block has many pores, which is easy to leak and lead to the collapse of the pond ridge, so the pond ridge should be thoroughly tamped. When the bottom of the fish pond is sandy, it should be covered with 10cm thick silt, which can prevent seepage, conserve water and preserve fertilizer.

2. Sun-drying fish ponds and applying sufficient basic fertilizer

After the fish pond is built, do not rush to inject water, you can flatten the bottom of the pond first, it is best to rake or plough it once, and then dry the pond, so as to promote the oxidation and decomposition of organic matter, loosen the subsoil and improve the soil temperature and productivity. The manure and bone meal were mixed and fermented at the proportion of 10:1. After the fish ponds were dried in the sun for 20 days, 150ml 250kg per mu was applied as base fertilizer. And sprinkle lime water to disinfect and neutralize the bottom of the pond. Then water injection, water depth of about 30 cm, per mu put rapeseed cake 10muri 15kg, forage 100mu 150kg, shallow water soak, so that its accelerated decay and decomposition. When the water quality becomes fat, inject fresh water to a depth of 100m / 120cm, and then release the fish fry. For the acidic newly dug fish ponds, should not be in a hurry to raise fish, should first sun, and then use manure, bone meal, quicklime mixed sprinkle, the proportion is 3:1:1. Then plant Ziyun Ying or ryegrass, when the grass grows to a certain height, apply quicklime 100ml 150kg per mu, irrigate about 30cm, soak 10 Mel for 15 days, wait for the grass to rot and decompose, and after the oxygen consumption peak, fish can be released.

3. Release of fish species

"in spring, the fry has a plague, and in winter, the fry is one-third longer." so the best time to put the fry is winter. When releasing the fish seed, the fish seed should be washed and disinfected, using 3% salt water for 10 minutes or 1 mg / kg trichlorfon solution for 5 minutes. The principle of release should be mainly herbivorous fish, supplemented by fertile and omnivorous fish, taking into account the bottom fish, and the quantity should be comprehensively considered according to water source conditions, oxygen-increasing equipment, species size and culture technology. When 800 large fish species are put on the water surface per mu, the yield per mu can reach 400 Mu and 500 kg. The matching ratio can be as follows: grass carp and carp 60%, silver carp, bighead carp 30%, carp crucian carp and other fish 10%.

4. Skillfully apply fertilizer and keep fat and water

The application of forced fertilizer should follow the principle of a small number of times, the combination of organic fertilizer and inorganic fertilizer, and the combination of nitrogen fertilizer and phosphorus fertilizer. Apply 100kg mixed compost of organic fertilizer and calcium superphosphate (50:1) or urea and calcium superphosphate (1:1) on every 15 water surface, and keep the pond water brown, grass-green, or yellowish brown according to water quality, weather and water temperature. the transparency is about 30 cm.

5. Sprinkle quicklime, mud and water

The newly dug fish ponds are muddy, affecting the respiration and plankton accumulation of fish. Quicklime can be applied once every 15 seconds for 20 days, the dosage is 20ml / mu, and sprinkled after dissolving water, it has a good effect of settling mud and clear water, and can also play a role in preventing fish diseases.

6. Patrol the pond frequently

It takes a long time to improve the ecological environment of newly dug fish ponds, and the staff should patrol the ponds and inject water frequently. Especially in the early stage of aquaculture, the water environment is poor, the fish carrying capacity is large in the later stage, and when the weather is muggy and rainy, it is easy to float or even flood the pond, so it is necessary to detect and solve the problem as soon as possible.

Winter fish pond management is a very important work, which often affects the output of the coming year, and it is also the key to high yield and stability, which must not be ignored.