Intensive cultivation of black fish needs to do well the four hurdles.

In order to make the intensive cultivation of snakehead have high yield and good benefit, we must do a good job in the "four hurdles".

The main results are as follows: (1) the  seedling has strong vitality and disease resistance, but the morbidity and mortality are higher in the fry stage. The stocking standard of intensive breeding in pond should be less than 100 per kilogram. This kind of seedling is close to the adult fish in all aspects, and the survival rate is high after stocking, so it is easy to raise. At the same time, it should be noted that the seedling specifications should be neat, disease-free and injury-free. Malformed seedlings with large head and small tail, improper proportion and exophthalmos can not be introduced and released.

2  feed fresh feed should be used in intensive culture of snakehead in pond. Fresh feed fish like to eat, save materials; not only a large amount of fresh feed, but also easy to cause water quality deterioration and cause intestinal diseases. You can't feed a full meal without starving. You should have plenty of food without wasting it.

(3) the water quality of  finishing pond is easy to deteriorate. Keep patrolling the pond many times a day to get rid of the residual feed. Rinse the feed with clean water before feeding. When changing water, do not let the water rush directly into the pond, so as not to frighten the fish and drill into the bottom of the mud. The correct way is to use the ditch to put water into the pond, or to cover a woven bag at the outlet of the pump to buffer the flow.

(4) the prevention of  disease is important for fish disease prevention. First of all, the ecological conditions should be good, and the fish stocks should be thoroughly cleaned and disinfected before release. The water quality is required to be fresh and pollution-free. The depth of the pond is 1.2m-1.8m, and the number of fish species per mu is controlled at 4000-5000. Water hyacinth is cultivated in the pond, accounting for 1/3 of the total area of the pond. On the one hand, it is shaded to avoid the summer, on the other hand, it purifies the water quality. Every 50 kilograms of feed mixed with 1 kilogram of salt to prevent intestinal diseases.