The raw materials for making feed mainly include grains, seeds and roots containing a large amount of starch, oily seeds such as rape, soybean, sunflower seeds, peanuts and cottonseed, and sweet sorghum stalks, mulberry, grass, corn and grains. According to different raw materials, it can be divided into feed containing a large amount of starch, feed containing oil, feed containing sugar, feed containing protein, green feed (green feed preserved after silage fermentation) and other feeds. Other types of feeds can come directly from nature (such as fish meal) or industrial replicas (rice bran, distiller's grains, leftovers, etc.). Different animals are suitable for different feeds, nutritional requirements, storage conditions and other aspects that need to be considered.
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