Venue selection
Farming sites should have sufficient water sources, convenient drainage, self-drainage, fresh water, no pollution, neutral or slightly acidic soil, adequate sunlight, quiet environment, convenient transportation, and normal power supply.
Pond construction
Pond specifications
Area of ​​50 square meters to 100 square meters, the pond around the surface 40 cm above the water, the pool depth of 80 cm -100 cm, the pond should be dug into the pool wall compaction, with a 50 cm 50 cm cement board for slope protection, laying the bottom humification About 20 centimeters of mud, water depth is maintained at 30 cm -50 cm.
Anti-escape facilities
Surrounding aquaculture ponds use mesh, plastic panels or porcelain plates as enclosures to prevent snakes, rats and other predators from entering the loach breeding area. The inlet and outlet ports are wrapped with 120 mesh mesh to prevent muddy escaping and the entry of predators and wild fish eggs and seeds into the pond.
Intake and drainage facilities
The inlet and outlet are diagonally arranged. The inlet is 20 cm above the water surface. The outlet is located at the bottom of the fish slip. It is connected with a PVC pipe to a height of 30 cm above the water surface. When draining, the water level can be adjusted by adjusting the height of the PVC pipe.
Fish slip (set mud pit)
In order to facilitate fishing, the pool should be provided with fish slips connected to the drainage bottom, with an area of ​​about 5% of the area at the bottom of the pool, 30 cm to 50 cm deeper than the bottom of the pool, and the fish slipped around the walls or be cemented with masonry. Thorough.
Prepare for stocking
Pond clearing
10 days before the muddy stocking, clear the pond, check the plugging of the hole, dredge into the drainage pipe, and plow the bottom mud. After the water reaches a depth of 10 cm, it is splashed and disinfected with 1 kg of calcined pulp per 10 square meters.
Water storage and fertilization
After 3 days in the clear pond, add water to a depth of 30 cm, apply basic fertilizer, apply 3 kg of fermented chicken manure or 5 kg of pigs, cattle, and manure per 10 m3 of water. Apply 7 g of nitrogen fertilizer per cubic meter of water. Phosphate Fertilizer 1 Grams.
Seed investment
The loach seedlings have a time of 5 months per year, with a seedling density of 1,500 to 2000 tails per square meter. When the loach grows to a body length of 3 cm, a pond should be screened and the density of the loach seedlings should be 60 to 80/m2. In the process of seed input, care should be taken to test the water before stocking to check whether the toxicity of water is eliminated. The gap between the temperature of the water in the seedling container and the temperature of the pool water cannot exceed 2°C when the seedlings are released. If the muddy seedlings are transported with oxygen in a nylon bag, the seedlings should be treated as “slow seedlings†before placing the seedlings under the pond, and the oxygenated nylon bags should be placed. In the tank for 20 minutes, when the oxygen temperature inside and outside the oxygen-filled nylon bag is the same, the seed is slowly released.
Feeding management
Pre-cultivation stage (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 loach species are ground into 15 kg of soya milk with 1 kg of soybeans, and they are sprinkled once a day in the morning and evening.
Post-cultivation phase
After the muddy seed size reaches 2 cm, 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 afternoon and afternoon, and the daily feeding amount should be 4%-10% of the loach body weight. Feeding amount should be considered as water quality, weather, and feeding conditions. When the water temperature is above 15°C, the loach's appetite increases with increasing water temperature. At 25°C-27°C, appetite is particularly strong; at 28°C, appetite gradually decreases. If the temperature exceeds 30°C or less than 12°C, feed or feed should be stopped.
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