How many soybeans are pressed out of the soybean oil eaten at home? Do you know this cold knowledge?

The oil yield of soybean is closely related to soybean variety, producing area, and extraction technology. from the current soybean varieties, the general oil production rate of soybean is in the range of 15-22%, that is to say, one jin of soybean can get one or two of soybean oil, which is much lower than that of rape, sesame and peanut.

Variety

For example, the average oil content of high-oil soybean "Dongsheng 79" cultivated by Mudanjiang Academy of Agricultural Sciences this year has reached 24.16%, which is really much higher than that of 17% of ordinary soybeans, and this oil content is even 2 percentage points higher than that of imported genetically modified soybeans. Since 1966, no variety approved in Heilongjiang has been able to exceed the proportion of 24%. It is also a breakthrough in the history of soybean breeding in China.

Place of Origin

As far as China is concerned, the climate difference between the north and the south is also great. Even if the soybean varieties in the north can bear fruit in the south, the quality will decline a lot. For example, in the United States, the climate here is more suitable for the growth of soybeans, and under the same circumstances, the oil content of American soybeans is one percentage point higher than that of Chinese soybeans.

Oil extraction process

At present, two main methods of oil refining are physical pressing and leaching. Physical pressing is a way to squeeze out the oil from soybean by exerting pressure on soybeans, which is also the most traditional way of oil refining. However, the oil leaching rate of this oil refining method is low, which can be one or two percentage points lower than that of leaching starting.

Nowadays, some refineries generally use leaching method to extract oil from raw materials with edible-grade solvents, which is also the most advanced extraction process internationally recognized, and the oil extraction rate is very high.

However, for those colleagues who have reached the top level in soybean refining technology, now basically the main difference in soybean refining is reflected in the quality of soybeans. It should be said that there is still a large gap between the oil content of soybeans in China and that of imported GM soybeans.

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