KNOWLEDGE

How high is the oil yield of rapeseed?

Rapeseed used to be the most important oil crop in the international oil extraction market. How to improve the oil yield of rapeseed is the most concerning thing for friends in the oil extraction industry. The oil yield rate is a decisive factor in the cost of sales.

How to Choose High-Quality Rapeseed

1. Select high-yielding varieties with strong disease resistance and high oil content, and strengthen cultivation management to increase the oil yield of rapeseed.
2. Apply sufficient boron and phosphorus and potassium fertilizers during the flowering and fruiting period to avoid excessive drought, prevent rapeseed sclerotinia and aphids and other diseases and insect pests, increase the number of flowering and fruiting, and increase fruit set rate, thousand-grain weight, and oil content. Harvest at the right time to avoid cracking of the fruit and rotten seeds in continuous rain.

Removing impurities can significantly improve the rapeseed oil yield

During the harvesting and drying process of rapeseed, it is inevitable to be mixed with some soil, stones, straw, and leaf fragments, which will absorb part of the oil during the pressing process, thereby reducing the oil yield.

Solution: Do not uproot the harvested rapeseed to avoid excessive soil. Spread the rapeseed stalks on tarpaulins and plastic paper, or wash the cement floor with water and then dry the rapeseed. Dry rapeseed as soon as possible after threshing to prevent mildew. After the dried rapeseed is separated from the husk and straw by a fan, it is stored in a cool, ventilated, and dry place.

Proper storage of rapeseed can improve the oil yield.

According to the experience of experienced farmers, the oil yield of rapeseed in that year was high. Put it into storage while it is hot to prevent the rapeseed from getting damp. It is best to use plastic film to isolate the humid air and prevent it from returning to moisture.

Reducing the ash content can increase the oil yield.

Before pressing, the rapeseeds are selected to remove impurities, and then the sediment and ash are filtered with a fine sieve, and then the rapeseeds are repeatedly rubbed with wet gauze to reduce the dust attached to the surface of the rapeseeds.

Oil yield can be improved by hot rolling

Add about 3% water first, then steam and stir-fry for 20 minutes to lose the moisture. Stir-fry continuously during this process to strive for even heating. After the rapeseed turns black, do not stick to the pan or extend the steaming time too much. Squeeze while it is hot for the highest oil yield. If the quantity is large, insulation measures can be taken for the rapeseed.

Whether the bearing of the oil press is deformed will directly affect the oil yield.

The bearings of the oil press are worn out quickly and should be observed and replaced in time, otherwise, the uneven pressing force will seriously affect the oil yield.
The oil yield rate of conventional rapeseed is only 30-40%. To increase the oil yield rate of rapeseed, we must first select varieties with high oil content, and then strengthen the cultivation and management level, reduce soil and other impurities, and use the hot rolling method to extract oil, The oil yield can be increased by more than 50%. If pollution-free rapeseed can be produced, the price can double.

Rapeseed has a higher yield, especially the double-low hybrid rapeseed, which has a greater potential for increasing yield. Rapeseed oil of mustard-type rape contains erucic acid, which has a unique flavor and a higher price. Areas with suitable conditions can safely develop it boldly. The supply is absolutely in short supply. You can also try it.