The specifications of compound feeds mainly refer to their properties and sizes. Commonly used powder, granular, puffed and so on. Its traits should be adapted to the feeding methods and feeding habits of different cultured objects. For example, the requirements for cockroaches and cockroaches are strong sticky powdery materials; fish, shrimp, and crabs are hard pelleted or puffed feeds; seedlings need to use microfine feeds. Its size, it should be suitable for the caliber requirements of the person who eats. When the particle size of the fingerling stage is larger than the diameter of the ingested person, it cannot be quickly and quickly swallowed by the fish species, and most of the particles are submerged or dissolved in the water, which increases the energy consumption during the feeding process of the cultured object; When the particle size is too small, the feeding time of the ingested subject is increased, and the energy consumed in the body is excessively consumed, which also increases the feed coefficient and reduces the weight gain ratio. In the conventional marine freshwater fish culture, generally 10 grams of the following species of fish, should choose the size of 0.5 mm to 1.5 mm of crushing material for feeding; 10 g to 15 g of juvenile fish, should choose a particle size of 1.5 Millimeters to 3.0 mm, length of 4 mm to 5 mm of cylindrical particles fed; 50 g of adult fish, should choose particle size 4 mm to 6 mm, grain length 6 mm to 8 mm columnar grain feed. Shrimp, crab compound feed also have corresponding special specifications.
The requirements for the intrinsic quality of compound feeds mainly refer to the fact that the nutritional indicators must be consistent with the nutritional needs of the cultured objects. Different types of materials have different formulas, and particular attention should be paid to the ratio requirements of proteins, sugars, vitamins, and inorganic salts. In terms of processing technology, we must choose non-pollution, mildew-free raw materials, finished by crushing, mixing granulation, aging and other processes. In this process, attention should be paid to the control of pressure and temperature, to minimize the damage and loss of nutrients, and to lay the foundation for reducing the feed coefficient from the source. The use of conventional feed can also be fed through certain processing methods to reduce the feed coefficient. For example, in legume feeds, due to the prevalence of antitrypsin, after ingestion, it affects the digestion and absorption of proteins. However, after heat treatment, trypsin can be invalidated and the purpose of reducing the feed coefficient can be achieved. In addition, the finer the comminution of the grain feed, the higher the digestion and absorption rate, which is a common method of reducing the feed coefficient in the processing process.
The requirements for the intrinsic quality of compound feeds mainly refer to the fact that the nutritional indicators must be consistent with the nutritional needs of the cultured objects. Different types of materials have different formulas, and particular attention should be paid to the ratio requirements of proteins, sugars, vitamins, and inorganic salts. In terms of processing technology, we must choose non-pollution, mildew-free raw materials, finished by crushing, mixing granulation, aging and other processes. In this process, attention should be paid to the control of pressure and temperature, to minimize the damage and loss of nutrients, and to lay the foundation for reducing the feed coefficient from the source. The use of conventional feed can also be fed through certain processing methods to reduce the feed coefficient. For example, in legume feeds, due to the prevalence of antitrypsin, after ingestion, it affects the digestion and absorption of proteins. However, after heat treatment, trypsin can be invalidated and the purpose of reducing the feed coefficient can be achieved. In addition, the finer the comminution of the grain feed, the higher the digestion and absorption rate, which is a common method of reducing the feed coefficient in the processing process.
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