Double low rapeseed refers to rapeseed with low erucic acid content in rapeseed oil and low glucosinolate content in rapeseed cake. The main fatty acids in rapeseed oil include oleic acid, linoleic acid, linolenic acid and erucic acid.
Oleic acid is easily absorbed by human body, which can reduce the concentration of low-density lipoprotein in human blood (cholesterol in low-density lipoprotein is easy to deposit on blood vessel wall, causing atherosclerosis and cardiovascular diseases), but it does not affect the concentration of high-density lipoprotein in blood (high-density lipoprotein is one of the L- protective factors to prevent arteriosclerosis). The content of oleic acid in double-low rapeseed is 60%, so it is called "the healthiest oil". The higher the proportion of linoleic acid, the better its edible quality. Linolenic acid, like linoleic acid, is one of the essential fatty acids to maintain human life activities, promote growth and maintain normal physiological functions, but it affects the storage of vegetable oil. Linolenic acid should not be too high (2%-4% is appropriate). Because of the high erucic acid content, the oleic acid and linoleic acid, which are important to human health, are low, so the nutritional quality of rapeseed oil with high erucic acid is poor. The erucic acid content in rapeseed oil of double-low rapeseed varieties does not exceed 5%.
The United States stipulates that the necessary amount of vitamin E per person per day is 30 mg; The Japanese regulation is 10 mg. However, many developing countries still cannot attach importance to this issue. According to the characteristics that vitamin E is digested and absorbed together with lipids and the antioxidant capacity of vitamin E, natural vitamin E is added in a proper proportion to the patented nutritional oil of PetroChina and Kangxinning soft capsules. It can supplement daily vitamin E, promote digestion and absorption of human body, and cooperate with other natural antioxidants to have antioxidant effect.
Glucosinolates are the main harmful components in rapeseed, which are not toxic in themselves, but will produce toxic substances under the action of enzymes. Feeding hens with high glucosinolate rapeseed meal will not only reduce their physique and egg production, but also cause complications such as pulmonary hemorrhage, resulting in a mortality rate as high as 62%-88%. Because the glucosinolate content in each gram of rapeseed cake is less than 30 micromoles, low glucosinolate rapeseed cake can be used as compound feed for pigs, chickens, fish and so on. The protein content of double-low rapeseed cake can be as high as 40% (rice is 8? 9%)。 The protein contained in one mu of rapeseed cake can provide protein quality for fattening 1- 1.5 pigs. ! Such rapeseed cake can be used as high-quality protein feed for livestock and poultry, which is beneficial to the development of animal husbandry production.