The suitable dosage of several kinds of fish
The drug dosage should not be too large, otherwise it may cause drug damage to the breeding object. Especially freshwater Pomfret, mandarin fish and other fish, sensitive to some drugs, improper use of drugs can easily cause death.
1. Freshwater white Pomfret
Pomfret is the most sensitive to organophosphorus pesticides. Therefore, it is forbidden to use trichlorfon, dichlorvos and other drugs.
Second, mandarin fish
Mandarin fish are sensitive to trichlorfon, copper chloride and other drugs. When the concentration of trichlorfon is above 0.2 ml / L and the concentration of copper chloride is above 0.7 mg / L, it can lead to poisoning and death of mandarin fish. Therefore, it is necessary to master the appropriate dosage.
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California perch is sensitive to crystal trichlorfon, so when using crystal trichlorfon whole pool to control California perch disease, the concentration should be strictly controlled below 0.3 mg / L.
IV. Snakehead
Ophiocephalus Argus is very sensitive to ferrous sulfate and should be used with caution or not.
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Rainbow trout is sensitive to trichlorfon and potassium permanganate. When the water temperature is 11.5 ℃ ~ 13.5 ℃, the safe concentration of trichlorfon to rainbow trout is 0.049 mg / L, especially the young rainbow trout is more sensitive.
- Prev
Excessive reproduction of cyanobacteria in Bengtang should be prevented in midsummer.
The high water temperature and strong light in summer is the high incidence season of cyanobacteria. Once cyanobacteria multiply in large numbers on the surface, the water quality will become thinner. It is not easy for pearl clams to digest cyanobacteria after eating cyanobacteria (cyanobacteria cell wall thickness). Cyanobacteria adhere to the clam's costal gills, affecting respiration. At the same time, after the death of cyanobacteria, the protein decomposes to produce hydroxylamine, which combines with toxic substances such as hydrogen sulfide in water, which can cause Yuzhu poisoning and death. Therefore, the excessive reproduction of cyanobacteria should be strictly controlled and targeted control should be carried out in summer. First, the summer temperature is high and the bottom layer is high.
- Next
Rapid breeding of money tortoise
The third-line closed-shell money tortoise is a second-class protected animal in the country, which has high medicinal value. At present, wild turtles are becoming more and more scarce. in order to protect wild resources, artificial culture is carried out in our farm, and its techniques are as follows: first, the construction of turtle ponds can choose cave type and land and water type according to the type of turtle pond. As the latter is convenient in management, it is easier to accept. It is composed of pool, land, spawning pool and turtle nest. The turtle nest must be shaded, and it is convenient to prevent escape, enemy damage and change. The breeding density of adult turtles is about
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