Soybean cake contains 42% of crude protein. Apart from a slight deficiency of methionine, the content of other essential amino acids is relatively balanced, especially the lysine content is as high as 2.3%. Driven by profits, some self-employed households use low-temperature oil extraction to produce soybean cake. This raw soybean cake contains anti-nutritional substances, which can be used directly to feed geese. 1. Antitrypsin: It can reduce the digestion and absorption rate of protein in feed, reduce feed conversion rate, slow growth of goslings, and reduce the egg production of mothers. 2. Hemagglutinin: It can be turned into toxin by the action of certain microorganisms in the digestive tract, which reduces the growth rate of goslings. 3, anti-vitamins: raw soybean cake contains anti-VA, VD, VB12 factor, can cause these vitamin deficiency. In view of the above factors, raw soybean cake can not be directly used as feed raw material to feed goose, it can be heated to above 100°C to destroy toxic substances and eliminate adverse effects.
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