Teach the difference between imported rapeseed meal and domestic rapeseed meal: the crude protein and crude fiber of imported rapeseed meal are both low, and the palatability and nutritional utilization rate are higher than those of domestic rapeseed meal. Domestic rapeseed meal has poor palatability, and high sulfur content leads to abnormal thyroxine metabolism, which will affect feed intake and milk synthesis, and the utilization rate is low.

Rapeseed meal, also known as "rapeseed meal", is a by-product of rapeseed oil pressing. Its crude protein content should be above 32% and crude fiber content should be below 65438 02%. Rapeseed is one of the main oil crops in China, and 95% of rapeseed in China is used to produce edible oil. At present, there are two common oil pressing technologies for rapeseed: dynamic rotary pressing and preloading leaching. The by-product of the former is rapeseed cake, and the by-product of the latter is rapeseed meal. It is one of the varieties of commodity futures.