Cultivation and Management techniques of Loach Seedling

Early cultivation stage

According to the water color, the right amount of topdressing. Topdressing can be used after fermentation of pigs, cattle, chickens, and other farm fertilizer, can also use calcium superphosphate, urea, ammonium carbonate and other chemical fertilizers, take a small amount of more application method, the water color is better with yellowish green, the water depth is controlled within 30 cm, and the transparency is controlled at about 20 cm. At the same time, every 200000 Loach species were ground into 15 kg soybean milk with 1 kg of soybeans and sprinkled once every morning and evening. The Misgurnus anguillicaudatus seedlings after feeding can be transferred to the nursery pond for cultivation. 7-10 days before use, the nursery pond was disinfected with quicklime, and the rotten manure of 10~12cm at the bottom of the pond was used as base fertilizer, injected with fresh water 20~30cm, waiting for the water color to turn green, transparent 15~20cm, and put into the Misgurnus anguillicaudatus seedlings for cultivation. The still water stocking density was 1000-1500 tails / m2. In the early stage of seedling breeding, the combination of fertilizer and feeding should be used, because Loach has strong selectivity to open bait. Rotifers, water fleas and other zooplankton filtered by 50 mesh standard sieves are mainly fed along the edge, and fermented manure 60~100g/m3 or dissolved chemical fertilizer 1~2g/m3 are sprinkled twice a week. After about 20 days, the seedling length can reach 1cm. At this time, Loach can feed on insects, insect larvae and organic debris in water. Can be fed with broken animal offal, blood meal, fish meal and other animal feed and fine feed such as rice bran, soybean meal, corn meal, bean cake crumbs, etc., once every morning and afternoon, accounting for 23.5% of the body weight of Loach seedlings at the beginning.

Late cultivation stage

After the seeding size of Loach reached 2 cm, the water level was gradually deepened to 50 cm. In addition to continuing to improve the water quality, compound feed should also be fed once a day in the morning and once in the afternoon, with a daily feed amount of 4% to 10% of the body weight of Loach. The amount of feeding should be flexibly controlled according to the water quality, weather and feeding conditions. When the water temperature is more than 15 ℃, the appetite of Loach increases with the increase of water temperature; when the water temperature is above 25 ℃ ~ 27 ℃, the appetite is especially exuberant; when it is more than 28 ℃, the appetite gradually decreases; when it is more than 30 ℃ or less than 12 ℃, feed should be reduced or even stopped, and the length of Loach seedlings can reach 3~4cm after more than 1 month, and then the pond should be divided into ponds to raise. The Misgurnus anguillicaudatus seedlings were disinfected with quicklime 7-8 days before putting Misgurnus anguillicaudatus seedlings in the pond, 40~50cm was injected into the pond, and fermented manure 150~200kg was applied to cultivate water quality. When a large number of plankton were cultivated in the pond, the Misgurnus anguillicaudatus seedlings with a density of 100 ~ 150 tails / m ~ 2 were released, which were basically the same as above. After 3 months of careful breeding, the species of Loach with body length 8~10cm and weight of 5 ~ 8g could be cultivated.

Management points for attention

The main results are as follows: 1. To meet the opening bait of Loach seedlings is the key to improve its survival rate: the newly hatched Misgurnus anguillicaudatus seedlings absorb the nutrition of egg yolk and mainly feed on rotifers and water fleas in water within two months after the yolk disappears. It is best to cultivate rotifers, water fleas and other zooplankton to feed Loach seedlings. Manure and chemical fertilizer are good fertilizers for raising Loach. It is necessary to continuously apply more fertilizer to the cultivation pond so that the seedlings of Loach have enough natural biological bait.

2. Misgurnus anguillicaudatus has partial feeding and night foraging habits: if its special habits are changed, artificial domestication should be carried out. Once a day in the evening, the feeding amount is from less to more, and the feeding time is gradually advanced. Until it can be fed at about 10:00 or 5pm and artificial feed can be eaten.

3. Adjust the water quality: often add new water, change water 1-2 times a week, fertilize frequently, keep the pond water color "fat, alive, tender and cool", yellowish green is the best.

4. Patrol the pond: patrol the pond once a day in the morning, in the middle and in the evening, observe the activity of Loach and the change of water color, and deal with the problems in time.

5. prevention of diseases: clean and clean the bait table frequently, do a good job in disinfection of feed tables and tools, and regularly feed drugs to prevent fish diseases.

6. Prevention of damage and escape: always check the intake outlet and pool ridge to prevent enemy invasion and Loach escape.