Cautions for fish disinfection
In the production practice of ①, the specific drugs used for disinfection should depend on the local prevalent fish diseases and drug sources; disinfection containers should be disinfected with pots, buckets, fish bags, tile tanks, etc., and metal products should not be used.
The appropriate time for ② disinfection is 8-9 pm or 3-4 pm on a sunny day; long soaking time will kill the pathogen thoroughly, but it will take a long time and lack of dissolved oxygen in water, which will cause floating head or death of fish. Therefore, in the specific operation, we should pay special attention to the dynamics of the fish. When the fish in the disinfectant can not stand it, when there is a toxic "whitening" phenomenon, the fish should be immediately put into the fish pond or increase the amount of water in the disinfectant to reduce the concentration of the solution; if the physique of the fish is weak and the water temperature is high, the washing time can be shorter, otherwise it should be longer.
③ solution should not be used for too long, otherwise it will reduce the efficacy. Do not increase the concentration of the solution at will and exceed the specified time, so as not to cause fish poisoning and death.
- Prev
Mote dwarf elephant grass, a fishery forage grass
Mote dwarf elephant grass is a gramineous forage introduced from the United States a few years ago. The grass is perennial, with a plant height of 0.8 mi 1.4 m, short and many nodes, a large number of leaves per plant and strong tiller regeneration ability. It is more hardy, the aboveground part is withered and yellow in winter, and the underground part survives. Sprouting in spring, the temperature begins to grow at about 12 ℃, and likes to grow in places where the soil layer is deep, fertile and moist. This kind of forage grass has high yield and high nutritional value. under good water and fertilizer conditions, it can produce 15,000-20,000 kg of fresh grass per mu, accounting for 8% of the total grass.
- Next
Principles and methods of medication for prevention of eel disease-oral method
Also known as internal medication, generally, the drugs used are mixed into the feed to make bait, so that Monopterus Albus ingest drugs through the intake of feed, so as to achieve the purpose of disease prevention. The problem with using this method is that usually when Monopterus Albus gets sick, it usually becomes a mass disease, with general loss of appetite or almost complete cessation of food, that is to say, the amount of drugs entering the body of Monopterus Albus is not too large, and the therapeutic effect is not very good. Therefore, it is necessary to take certain technical measures to do everything possible to make the diseased ricefield eel better ingest the bait, such as stopping the feed one or two days before applying the bait.
Related
- On the eggshell is a badge full of pride. British Poultry Egg Market and Consumer observation
- British study: 72% of Britons are willing to buy native eggs raised by insects
- Guidelines for friendly egg production revised the increase of space in chicken sheds can not be forced to change feathers and lay eggs.
- Risk of delay in customs clearance Australia suspends lobster exports to China
- Pig semen-the Vector of virus Transmission (4)
- Pig semen-the Vector of virus Transmission (3)
- Five common causes of difficult control of classical swine fever in clinic and their countermeasures
- Foot-and-mouth disease is the most effective way to prevent it!
- PED is the number one killer of piglets and has to be guarded against in autumn and winter.
- What is "yellow fat pig"? Have you ever heard the pig collector talk about "yellow fat pig"?