The cultivation of loach seedlings is the basis for breeding. Cultivating good loach seedlings is a key technical step for aquaculture. Now we introduce the cultivation techniques of loach seedlings as follows.
First, stocking preparation Prepare the mud for 10 days before stocking. The pond is filled with water 10 centimeters deep, and 0.1 kilograms of calcined pulp is sprayed and disinfected per square meter. After 3 days of clear pool, the water depth was increased to 30 cm. 0.3 kg of chicken manure or 0.5 kg of pigs, cattle, and manure was applied per cubic meter of water.
Second, the seedlings to put loach seedlings into the pool for the time of each year in May, the seedling density of 1500-2000 per square meter. When the loach seedlings are raised to 3 cm in length, the ponds should be screened and the density of the loach seedlings should be 60-80 tails per square meter. In the process of laying seedlings, care should be taken to test the water before stocking to check whether the toxicity of water is eliminated. When the seedlings are released, the water temperature in the seedling container must not differ from the water temperature of the pool water by more than 2°C. If the muddy seedlings are transported by oxygen in a nylon bag, they should be treated as “slow seedlings†before placing the seedlings in the lower pool, and the oxygenated nylon bags should be placed in the tank. In minutes, the water temperature inside and outside the oxygenated nylon bag is the same, and then the loach seedlings are slowly released.
Third, feeding and management
1, the pre-cultivation stage (mud seedlings less than 2 cm in length). According to the situation of water color, top dressing is appropriate. Fertilizers can be used to fertilize farmyard manures such as pigs, cattle, chickens, and human feces. Superphosphate, urea, and ammonium bicarbonate fertilizers can also be used. Small amounts of water can be used. The water color is yellow-green, and the water depth is controlled within 30 cm. The transparency is controlled at about 20 cm. At the same time, every 200,000 rearing muddy seedlings are ground into 15 kilograms of soybean milk with 1 kilogram of soybeans.
2, the late stage of cultivation (up to 2 cm after the size of muddy seedlings). Gradually deepen the water level to 50 cm. In addition to continuing to fertilize the water quality, it should also be fed with compound feeds, which should be fed once a day in the morning and in the afternoon. The daily feeding volume should be 4% to 10% of the body weight of the muddy ponds, depending on water quality, weather, and feeding conditions. When the water temperature exceeds 30 °C or less than 12 °C, the feed should be dropped or even stopped. When the loach grows to a body length of 5 cm, it is used as a pupa species and used for breeding.
Fourth, daily management
1, adjust the water quality. Add new water, change the water 1 or 2 times a week. Diligently apply fertilizer to keep the water quality fresh and cool. The water color is yellow-green.
2, patrol pond. Inspecting the loach activity and the change of water color once in the early, middle and late afternoons, and finding problems in time.
3. Regularly prevent diseases. Clean up and clean feedstuffs, disinfect feedstuffs and tools, and regularly feed biological agents or drugs to prevent fish diseases.
4, prevent and prevent escape. Pay attention to the prevention of enemy invasion and mud escaping, and always check the inlet and outlet.
Recommended reading: Muddy supply: http://?Client_ID=27197&Edition_ID=1&boardid=6779
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