The more yellow the feed is, the better the quality is. Compound feeds focus on the comprehensiveness and balance of their nutrients, and the depth of feed color is not directly related to the nutritional value of the feed itself. In the vegetable protein feed, the color of the bean cake is light yellow, and its nutritional value and palatability are relatively good; while the color of the cake and the cotton cake is relatively deep, and the palatability is slightly poor. Therefore, some farmers believe that the color of the feed is light yellow, that is, the amount of bean cake is used, and the feed quality is good. In fact, this is a wrong view. In order to pursue high profits, some feed manufacturers use the psychology of the masses in pursuit of feed color, adding chemical pigments to the products, and increasing the sales volume in order to harm the consumers.
The better the feed is, the better the fragrant quality is. The odor of compound feeds should be based on the inherent odor of the feed itself. Adding proper amounts of flavoring agents such as flavourings, sweeteners, and umami agents in the formulated feed can stimulate the appetite of livestock and improve feed palatability and feed conversion ratio. Promote the growth of pigs. But this only changed the physical properties of the feed, and the nutritional value of the feed itself did not increase. If one-sided pursuit of sensory effects, excessive addition of flavoring agents may have some toxic side effects such as salt poisoning, and even reduce their commodity utilization.
The higher the protein content of feed is, the better the quality is. Livestock and poultry diets must have enough protein feed for their long-term growth and development needs, but not as much protein as possible. This is because at different stages of growth, the body's absorption and utilization of proteins is different. Too much protein is supplied, and not only can livestock and poultry not be converted into body proteins, but also through a series of operations of the organism and consumed as energy feed. . This is not only a waste of protein feed, but also increases the burden on the kidneys of livestock and poultry and affects their health.
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