Differences in adaptability between aquaculture scenarios and fish species. Traditional feeds are mostly general-purpose powders, which cannot adapt to the different feeding habits and nutritional needs of various fish species: mid-to-upper-level fish (such as bass and tilapia) require floating feed, while bottom-dwelling fish (such as grass carp and common carp) require sinking feed. Traditional feeds cannot flexibly switch between floating and sinking feeds, easily leading to insufficient feed intake after feeding. Pellet feed produced by dog food processing machines has extremely high adaptability: twin-screw extruders can produce three types of feed—floating, sinking, and semi-floating—by adjusting parameters such as screw speed, die orifice diameter, and raw material moisture content, precisely adapting to the feeding habits of fish at different water levels. Simultaneously, the pellet size can be adjusted (from 1mm fry feed to 5mm adult fish feed) to meet the needs of different aquaculture stages. For example, when raising bass, using extruded floating feed results in a feed intake rate of over 98%, while traditional powder feed sinks to the bottom in large quantities, with a feed intake rate of only about 70%.
The core difference lies in customized production capabilities. Traditional feed formulations are fixed and cannot be adjusted according to the fish's growth stage and farming environment, easily leading to nutritional imbalances. Dog food production machines enable full-process customization: in terms of raw material ratios, the protein, starch, and oil content can be adjusted according to the fish's growth stage (fry, juveniles, adults), such as high protein (35%-40%) and low starch in fry feed, and medium protein (25%-30%) and high starch in adult fish feed; in terms of function, disease-resistant feeds (with added immune enhancers) and stress-resistant feeds (with added vitamin C and electrolytes) can be customized to suit different farming environments (such as high-temperature, high-density farming). Among these, the extruder offers the best customization capability, allowing for precise adjustment of extrusion degree, hardness, and water resistance through parameter control, producing high-end customized feeds that meet specific needs—something traditional feeds cannot achieve.
The core role of the extruder in customized production. The modular design and adjustable parameters of the pet food processing machine provide a foundation for customized production: changing the die head with different aperture and shape allows for the production of pellets of different specifications and shapes; adjusting the screw speed and steam addition amount changes the degree of expansion, enabling switching between buoyancy and sinking; and with an automated control system, the raw material ratio and processing parameters can be precisely controlled for mass production of customized feed. Furthermore, the extruder can process a variety of raw materials, including high-fiber and high-moisture materials, allowing for flexible formula adjustments to meet the nutritional needs of different fish species while maintaining stable feed quality. This customization capability helps farmers address specific aquaculture challenges and improve farming efficiency, a core advantage unmatched by traditional feed manufacturers.
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