Puffing and swelling change the physical structure and chemical properties of the ingredients in the feed ingredients.
1. The gelatinization degree of starch is improved, and modified starch is formed, which has strong water absorption and bonding function. Due to its high water absorption, we can add more liquid ingredients (such as oil, molasses, etc.) to the product. At the same time, because it has a much stronger bonding function than ordinary starch, the amount of starch added during the expansion process. Can be greatly reduced. This provides more room for the selection of other raw materials, and the choice of a wider variety of inexpensive materials to replace those expensive materials can significantly reduce costs without compromising product quality.
2, because the protein and starch matrix are combined, it is not easy to lose when feeding, only when the animal's digestive enzymes break down the starch, the protein is released, which increases the protein titer. The puffing process also denatures the protein, inactivates many anti-nutritional factors, changes the tertiary structure of the protein, and shortens the hydrolysis time of the protein in the intestine. For ruminants, puffing produces rumen non-degradable protein, that is, ruminal protein, which can avoid ammonia poisoning and improve protein utilization.
3. Puffing treatment releases the encapsulated oil in the raw material molecule, which increases the thermal energy value of the fat. The expansion also forms a complex product lipoprotein or lipopolysaccharide together with starch or protein, which reduces the free fatty acid content and at the same time passesivates the fat. The enzyme inhibits the degradation of oil and fat, and reduces the rancidity and defeat of the oil components during storage and transportation.
In addition, the puffing treatment also reduces the content of bacteria, mold and fungi in the raw materials, improves the hygienic quality of the feed, reduces the amount of various pharmaceutical ingredients, improves the palatability, increases the potency of the low-quality raw materials, and reduces the feed cost.
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