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Identification of fish pellets for quality use
With the promotion of intensive fish farming, there are more and more fish farmers using compound feeds for fish farming. Feed has the largest proportion of the cost of fish farming. Therefore, the quality of feed is of utmost importance in aquaculture. Only the use of high-quality compound feed can make the farmed fish grow fast, suffer less disease, and have a low feed coefficient. To identify the quality of feed mainly from the following aspects. 1. Perceptual standard: High-quality pellet feed, its color is uniform, scent, no odor. No mildew, no agglomeration, no pollution, no impurities, hard particles, smooth surface. On the contrary, it is poor quality feed. 2. Physical index: There is basically no color difference between each particle of feedstuff. In this way, it shows that the particle size of the raw material is finer, and the stirring is more uniform, and the stability of the water is good. Put it into the water for 15-20 minutes without scattering particles. Reduce the loss of water-soluble nutrients in feed. In addition, the molding rate of the particles is low. 3. Nutritional indicators: Nutritional indicators of feeds refer to the contents of feed energy, protein, essential amino acids, fat, crude fiber, ash, inorganic salts, and various vitamins. This must pass the nutritional composition test with the factory standard to know whether it is qualified. However, based on the intuitive indicators based on experience, comparisons can also roughly determine the level of moisture content and the amount of major raw materials used. Feeds with high moisture content are not conducive to storage and are prone to mildew. The moisture content of general feed should not exceed 12%. 4. Hygiene indicators: China has not yet specified a formal health quality standard for fish feed, but at least the requirements for fish-based pelleted feeds are pollution-free, free from sundries, pesticide residues, pathogen-free bacteria, and free of toxins. Metal elements and toxic organics.