Fish Feed Machine Knowleagde

Feed is the carrier of nutrients and contains the nutrients needed by animals. Common feed types for catfish can be divided into two categories: natural bait and artificial compound feed. Natural bait mainly includes water fleas, water worms, small trash fish, etc.: The intensive breeding of catfish is mainly artificial compound feed, which is divided as follows according to the feed form.

1. The powdered feed is the product after various raw materials are crushed to a certain fineness and fully mixed according to the formula ratio. Before feeding the southern catfish powder, the powdered feed is mixed with water into lumps. The lumps are thrown into the fish pond, which requires that the lumps are not only insoluble and not dispersed, but also have a certain degree of flexibility and extensibility to facilitate fish feeding. . It is also possible to mix powder and water in a certain proportion and use a screw-type soft granulator to produce soft granules with a water content of 25% to 30%, different diameters, and soft textures, and put them into the fish pond.

Southern catfish like to eat soft pellets

2. Hard pellet feed refers to a cylindrical feed that has a certain hardness and shape after powdered feed is tempered by steam at high temperature, pelletized by a pelleting machine, and then cooled and dried. The water content is below 12%, and the particle density is about 1.3 g/cm3, which is a sinking feed.

3. Extruded feed -fish feed machine
Extruded feed is prepared by feeding powdered material into an extruder, after mixing and conditioning, heating, pressurizing, extruding die holes, suddenly reducing pressure, cutting into pellets, and drying. Various extruded feeds. The water content is about 9%, and the particle density can be less than 1 g/cm. It is usually a floating feed.

The three types of materials have their own advantages and disadvantages. The powder is easy to process and can be easily made into soft pellets. It has good palatability but needs to be made into soft pellets before each cast. The water content is high and it is not convenient to store. The production of hard pellets Simple, low cost of suppression, convenient transportation, storage and feeding of finished products, but poor water resistance; extruded pellet feed can float on the water for a long time, which is convenient for farmers to observe the feeding situation of fish and reduce feed waste. The labor cost of feed is relatively high, and the processing process severely damages heat-sensitive vitamins such as vitamin C.

Southern catfish is a fierce carnivorous class. Most of its feeding objects are small aquatic animals.

It can smoke a variety of fish (including similar) equivalent to about 1/3 of its length. It likes to eat iced fish and poultry. Animal food such as offal. The open day feed of the southern catfish fry is finely chopped water worms of large zooplankton; fry of about 2 cm in length can swallow chironomid larvae, water worms, minced surimi, and fingerlings of more than 3 original meters are good. Ingestion of water worms, fish meat and artificial compound feed of small size (particle size 0.5 mm, 0.8 mm), the conversion process uses the compound feed gradient to replace the water earthworms until all the artificial compound feed is consumed. The entire conversion process requires 7~ 10 days to complete.