Screening and cultivation of parent fish
1. Pond conditions: equipped with two ponds with an area of 2-3 mu, which are male parent cultivation pond and female parent cultivation pond respectively. The depth of the pool is required to be 2 meters, the pool slope is impervious, the bottom of the pool is flat and free of weeds, and it is convenient for injection and drainage. Drain the pond water 30 days before stocking, 7-10 days before stocking, water injection 5-8 cm deep, clear the pond with 125 kg quicklime per mu and disinfect it.
2. parent fish screening: 2-year-old allogynogenetic silver crucian carp is selected as the female parent, with a tail weight of more than 600g, normal shape, silver gray and rich luster, and the local male carp (commonly known as Taihu carp) with a tail weight of 800g and 1200 grams is selected as the male parent. The ratio of the two is 1-1.5 1.
3. Parent fish cultivation: allogenic silver crucian carp and carp are cultivated in special ponds respectively. Choose fine weather to feed in winter, the feeding rate is 1-1.5%, increase the feeding rate when the water temperature reaches 5 ℃, and gradually increase the feeding rate from 1.5% to 3%, mainly pellet feed. The fish pond maintains good water quality, sufficient dissolved oxygen and transparency of about 30 cm. Raise the water level to 1.5 meters when overwintering, so that the parent fish can survive the winter safely. After the beginning of spring, choose fine weather to change water, change water 10-15 cm deep every day. When the water temperature reaches 12 ℃, lower the water level to 60-80 cm.
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Fish head bean curd soup with rich noodles
Cuisine: Sichuan food raw materials: 2 fish heads, 50 grams of shiitake mushrooms and bamboo shoots, 100 grams of tofu. Production process: first deep-fry the fish head; then add a little bean clove, spring onion, ginger and garlic, add the soup to boil and remove the dregs, put in shiitake mushrooms, sliced winter bamboo shoots, tofu, soy sauce, salt, monosodium glutamate, pepper, cooking wine, fish head cooked, thicken and sprinkle with green garlic.
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The cultivation of fish fingerling in autumn
The range of water temperature in autumn is generally between 20 ℃ and 30 ℃, which is a good time for fish growth, especially for fish species with small size and poor physique, so farmers must strengthen the cultivation of fish species. After several months of breeding in spring and summer, the water quality gradually aged, the dissolved oxygen and biological bait decreased, and the number of pathogenic microorganisms increased, which will stagnate the growth of fish fingers. in particular, grass carp are more likely to get sick in such old ponds. At this time
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