Rapeseed meal and soybean meal are heavier than soybean meal. Soybean meal is a by-product of soybean oil extraction, which can be pressed into a certain weight of coarse soybean meal cake. The differences between soybean meal and rapeseed meal, by-products of oil pressing, as feed are as follows:

1, in terms of nutrients. The protein content of soybean meal can reach 48%, which is a feed rich in protein and various amino acids, and can be used without detoxification. The protein content of rapeseed meal is only about 36%, and the starch content is also very low. But it is rich in methionine and lysine, and the mineral content is also good. There is a component in rapeseed meal that will become harmful under certain conditions, and it should be detoxified when used.

2. In terms of usage. Soybean meal is widely used in poultry, pigs and cattle breeding, especially in poultry breeding, the usage can be as high as 50% or more. In recent years, because soybean meal is rich in amino acids, it has been used as a substitute for fish meal in aquaculture by some people. Rapeseed meal will also be used in the feed of pigs, cattle, fish and other animals, basically as an additive component of feed. In the feeding process, the detoxified rapeseed meal is put into feed, and the consumption will not exceed 25%.