European salmon fry cultivation techniques

White-breeding culture is a period with high technical content and the most meticulous management requirements during the cultivation of carp. The quality of breeding directly affects the proportion and economic benefits of the three types of carp. Here, I summarize my many years of experience for reference. First, the preparation before cultivation: First check the bottom of the pool and the pool wall for cracks, timely repair. Dianchi Lake Disinfection 200mg/l quicklime or 20mg/l bleaching powder Quanchiposa, 7 days after the wash and then refill with 30mg/l potassium permanganate Quanchiposa, 3 days after the water drained for use. Above the pool covered with black film insulation, so that the pool into a dark environment. Above the bait station, a 15W electric light bulb is placed. The light is concentrated above the bait station so as to attract the squid to concentrate on the bait station. The heating pipe should be installed on the temperature pipe next to the inlet to install a protection basket to avoid the damage of the carp which comes from the pipeline when the gas is opened. Second, the red worm treatment: Just entered the red worms into the holding pool, micro-water rinsing constantly 2-3 days, once per hour turning, once the net to climb more than 3 times, then take the crawling Internet worms For the following treatment: After soaking in 5‰ saline for 30 minutes, rinse with clean water, then use chlorine dioxide 2g/cubic meter solution to soak for 30-60 minutes, then rinse directly and feed directly. Because chlorine dioxide solution was used to infuse soaking and sterilizing, the red worms are not easy to die of hypoxia, and it also reduces the possibility of enteritis caused by squid. Third, aquaculture method: Before the water culture, the waterwheel impeller is rotated in the reverse direction to make the water in a microfluidic state. The stocking density is 500-700/m3, and the daily water temperature is kept at 26-27°C. Normal white cats begin to recuperate gradually after entering the pool for 36 hours. When they reach about 23°C, they can be fed with minced red worms. Try to make most of the squid have access to red worms. The time is about 30 minutes. Make it grow neat and reduce three types of seedlings. In the first 3-5 days, the whole pond should be fed with red worms, and the area where the red worms spilled should be gradually reduced to the bait station after 5-7 days, and the habit of cultivating the bait on the squid should be established as soon as possible. Before feeding the red worm, the lamp above the feed table should be opened to facilitate the squid's focus on the bait station. The amount of red insects in the sun will account for more than 30% of the weight of the carp. After the feeding, the water level in the Dianchi Lake should be gradually increased to increase the oxygen boosting capacity of the water tank. The water level rises to about 50-60cm in 20 days, maintaining good water quality and adequate dissolved oxygen. Drainage and discharge of sewage: During the feeding of red insects, the pool water is easily contaminated, and the amount of water to be replaced should be more than 1 time of the original pool water, and the temperature difference when changing the water should be less than 1°C. Sewage should be drained as much as possible at the bottom of the pool, the operator should put the brush close to the bottom of the pool, slowly push gently to the sewage outlet, do not wash the bottom of the pool back and forth, so as not to damage the carp.

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