Water quality management of Misgurnus anguillicaudatus culture pond

It is difficult to regulate and control the water quality of Misgurnus anguillicaudatus culture ponds. After a period of time, the water quality of the ponds often blackens, there are many foams on the water surface, various water quality indicators seriously exceed the standard, and it is easy to have a large number of deaths of Loach. Below, the editor of Guizhou Agricultural Network will introduce to you how to manage the water quality of Loach culture ponds.

Water quality management of Misgurnus anguillicaudatus culture pond

1. Pay attention to the weather change and control the water temperature of the pond. As the water level of Misgurnus anguillicaudatus culture is generally not deep, the water temperature should be controlled within 30 ℃ in midsummer. Sunshade net, add lower temperature water to adjust. In the early stage, we can plant aquatic plants such as water hyacinth or hydrotalcite, the water hyacinth in the purification pond is mainly to purify the water quality, the water hyacinth in the culture pond can not only shade the sun, but also provide a natural habitat for Loach. Not only that, water hyacinth is also a good feed and fertilizer, and has become a "hero" of Loach soilless culture. After a little processing, the water hyacinth is a good green fodder, which can be fed to pigs and geese. After being fished out of the water for a period of time, it is also a good farm manure.

2. Water quality control should be strengthened to avoid the deterioration of water quality. In the process of Misgurnus anguillicaudatus culture, it is necessary to keep the water color yellow and green, have sufficient live bait, and can not make the water too fat and anoxic. Keep the water level about 30 cm in the early stage, and exchange part of the water every 5 days. Keep the water color by controlling fertilization and baiting, and don't overfeed. As the loach seedlings grew to the later stage, the water level gradually deepened to 50 cm.

3. We should pay attention to the changes of water sources and prevent the occurrence of pollution and poisoning. Misgurnus anguillicaudatus farmers should pay close attention to the changes of water quality, pay attention to the changes of physical and chemical indexes such as water color, odor, suspended matter, turbidity and so on. Once abnormal, stop entering water immediately to avoid the occurrence of pollution poisoning.

Do a good job in the control of bacterial diseases in fish

After heavy rain, it is easy to have bacterial hemorrhagic disease, rotten mumps, enteritis, white head and mouth disease and other diseases. Disinfection can be regularly sprinkled with quicklime, chlorine dioxide, dibromohydantoin and other drugs. At the same time, drugs were added to the feed to find dead and diseased fish in time for harmless treatment.

Prevention and control of fish parasite diseases

The main parasites are Chinese mackerel, anchor head mackerel, fish fish, ring worm, rotifer, oblique tube worm and so on. There are more protozoa such as rotifers and oblique tube worms in the fertile ponds where the water quality is deteriorating, and there are more crustaceans such as Anchorage in thin ponds. When killing parasites of protozoa, it is appropriate to choose ivermectin or copper sulfate and ferrous sulfate mixture. When killing crustaceans, trichlorfon and pyrethroids are generally selected.

Timely regulation of water quality after heavy rain

The pH value of the water quality of the fish ponds in the mountain area is generally low after the rainstorm. Quicklime should be used regularly in the aquaculture water body, once every 20 days, with a dosage of 20 Mu and 30 kg per mu, and timely use of microbial agents and sediment modifiers to improve the water quality and sediment quality.