First, it is the key to ensure that clear spring water is injected into the pond for a long time, and the pond water should be kept clear and pollution-free for a long time.

The second is to put in forage to realize timing positioning. Every once in a while, that is, 8-9 am and 3-4 pm, put the forage into the bamboo sieve in the center of the pond, take it out after 1 hour, and dump the residue.

Third, fish should be soaked and disinfected with 2%-4% salt solution before going into the pool. In addition to feeding grass and removing residue every time, the residue at the bottom of the pool should be thoroughly removed every half month. Ensure the quality of fresh water and promote the growth of grass carp.

Fourthly, the grass carp grows to about 1.5 kg, and it should be put on the market step by step according to the principle of choosing the big ones to keep the small ones, choosing the injured ones to keep the healthy ones, and choosing the weak ones to keep the strong ones, so as to improve the efficiency of fish farming.

Steps:

1. pond opening: choose a small pond with long-term clear spring water, convenient irrigation and drainage management, free from mountain torrents, relying on cohesive soil on both sides of the house and no leakage;

2. Planting grass: in order to ensure the rapid growth of grass carp raised in a small pond of 30 square meters, 400-800 square meters of high-quality forage grass must be planted in the mountainous area in front of the house before the fry is released 1 month;

3. Pool cleaning: Before releasing fish in 65,438+0-2 months, a 30-square-meter pond should be sprinkled with 65,438+05 kilograms of hydrated lime and 60 kilograms of human urine, disinfected by fire, dried and fished out. Then fill the pond with water 50-60 cm deep. The disease resistance and survival rate of fish species can be improved by releasing several ten tail fry for trial cultivation and releasing a large number of fish species after no abnormal reaction.

4. Release: Grass carp can only be released in running water fish culture in small ponds, and other fish species cannot be mixed. The specifications are mainly grass carp of 0.25-0.5 kg, and 200-250 fish can be released in a small pond of 30 square meters, and the survival rate can reach over 95%. It should be noted that when fish species are released, if the water temperature is low, they should be fed with cooked sweet potatoes mixed with rice bran or wheat bran, or fed with pellet feed for fish to maintain fertilizer and promote growth.