Three keys to the technique of cultivating snakehead

Speaking of snakehead, many people may not know what kind of fish it is, but when it comes to black fish, everyone is very familiar with it. In fact, snakehead is a blackfish, but its name is different. Some people like to call it snakehead. Some like to call it blackfish.

Three keys to the technique of cultivating snakehead

The pond covers an area of 0.5 million mu, with a bamboo fence 1.5 meters high and a water depth of 1 to 1.5 meters. It is appropriate to inject water from the top of the pool 30 cm away from the dike, so as to prevent the snakehead from escaping against the water. Some water lotus can be planted in the pond to provide shelter for snakehead.

The stocking density should be determined according to the source of bait and water source. Generally speaking, 8 fish species of 5 centimeters and 6 centimeters per square meter can be stocked at first. As the fish grow up, they should be screened by dragnet many times, and the sizes and specifications should be sparsely raised in the same pond. The final stocking density is about 2 fish per square meter. If the bait is sufficient and the water is abundant, the stocking amount can be increased appropriately. Generally release 15-20 cm of fish every other year, from April to the end of the year, each tail can weigh more than 0.6 kg. Monoculture snakehead can be fed with live bait or artificial feed. The former is dedicated to live fish (mainly tilapia), shrimp, earthworms and so on. Conditionally, some abandoned animal offal can be fed, or electric lights or oil lamps can be set up on the water surface of the pond to attract insects to fall into the water as bait for snakehead. The feeding amount of live bait should be properly controlled. Too much feeding will cause anoxic floating head phenomenon. At ordinary times, we should pay attention to the reduction of live bait in the pool. If you feed artificial feed, you should tame the bait from an early age, so that it will gradually change from eating live bait to eating artificial feed. Never feed live bait in the middle of the taming bait. Artificial feed generally contains 70% mixed fish sauce, 20% soybean meal or eel feed, 5% yeast powder, plus some vitamins. Feed once every morning and evening, the feeding amount is 50.8% of the body weight of the fish, according to the eating situation. Bait should be positioned at a fixed time to get used to the same position and eat the feed all at once. Patrol the pond every day, especially in thunderstorm or muggy weather, pay attention to the fish jumping out of the pond. Remove the residual bait before feeding, so as not to affect the growth caused by the deterioration of the water quality. It is best to inject some new water every day to keep the water fresh.

What is snakehead?

Ophiocephalus Argus, commonly known as black fish, is ferocious, fertile and has a large appetite. It can often eat all other fish in a lake or pond, even its own young fish. Blackfish can also glide on land, migrate to other waters in search of food, and can live out of water for as long as three days. It is the "dish delicacy" of the Chinese people.

Feeding technique of black fish

1. Pond construction: choose the east-west direction, rectangular pond, the bottom of the pond is soil, the depth of the pond is 2-2.5 meters, the water depth is 1.5-2 meters, the inlet and drainage should be equipped with anti-escape facilities, and 100kg / mu of quicklime should be thoroughly disinfected 15 days before breeding.

2. Fish stocking: before entering the pond, the fish should be soaked in 3% to 5% salt water for 10 minutes for 15 minutes, and then put into the pond. The fish species with a body length of 10 centimeters and 14 centimeters will have a stocking density of 9000 million fish per mu and 16 fish species per mu, and the stocking density is 8000 fish per mu.

3. Daily management: pay attention to observe the feeding, activities, morbidity trend and environmental changes of black fish. Change the pool water 4 times a week in spring, a small change every 3 days in the high temperature season, a big change every 7 days, enter and drain to catch the escape net, and the pool ridge is more than 50 cm above the surface of the water. For the discharged sewage, the necessary sewage treatment should be carried out.

4. Feed feeding: feed for black fish, including artificial compound feed, small miscellaneous fish of fresh water or sea water, and scraps of livestock and poultry after slaughter. Before feeding, small miscellaneous fish need to be sorted to remove fish with hard spines, such as Pelteobagrus fulvidraco. Before feeding, use slapping as a signal to concentrate distant fish near the bait table to reduce feed waste. The initial feeding amount is 10% of body weight, and then it can be appropriately reduced to about 5% of body weight. It should be fed with one spoonful, so that the waste of feed is less. Feeding should adhere to the "four-fixed" principle, and each pond should choose 3-4 feeding points. The way of intensive culture is adopted, with a body length of more than 10 cm. After 8-9 months of culture, the survival rate is 75%-80%, the average body weight is 0.5-0.7 kg, and the yield per mu is 4000-5000 kg. Plant some aquatic plants in the pond, such as Rabdosia angustifolia, Sophora flavescens, water peanut, etc., and the planting area should be controlled at 1 / 3 of the pond area.

Nutritional value of black fish

1. Blackfish meat contains protein, fat, 18 kinds of amino acids, etc., as well as calcium, phosphorus, iron and a variety of vitamins essential to the human body.

2. It is suitable for people who are weak, hypoproteinemia, spleen and stomach qi deficiency, malnutrition and anemia. Black fish is often regarded as a precious tonic to promote milk and tonify blood in Guangxi.

3. Black fish has the effect of dispelling wind and treating chancre, tonifying spleen and replenishing qi, promoting water and reducing swelling, so there are often parturients, rheumatism patients and children with disease looking for snakehead fish as an auxiliary food therapy in the three northern areas.

4. The vitality index of black fish is 0, but the disease prevention index is 6.41.

People who have eaten blackfish should be very familiar with it, the nutritional value of blackfish is very high, and blackfish is fiercer than ordinary fish, so breeders should master certain culture techniques in the process of culturing blackfish in order to be more conducive to the smooth progress of culture.