Rapeseed is one of China's traditional main edible oil materials. It often matures in late April to mid-May. The harvest period is short, and when it is busy, coupled with the continuous rain, if it cannot be dried in time, it may cause rapid changes in quality. inferior. Therefore, we should adopt scientific storage methods. 1. Dry storage: Rapeseed should be harvested and harvested in a sunny and timely dry season after harvesting. Generally, it is mainly sun-based and supplemented by drying. After drying, it must be cool before it can be stored. During the drying process, impurities should be removed at the same time so as to reduce the amount of contaminated dust and reduce the degree of mildew. When storing, it should be reasonably stored according to the requirements of processing and the specific conditions of rapeseed: If the water content is below 10%, the short stack of 2.5m high that meets the requirements of processing and pressing oil can be stored before the high temperature in summer; if it needs a longer period of preservation, Water should be reduced to 8% or less in short heaps or packaged stockpiles for successive processing and oil extraction; if the moisture content is 10%-13%, the processing requirements cannot be met, and generally it can only be kept for 1-3 weeks. It should be on sunny days. Out of the sun, the moisture content can be reduced to less than 10% before processing and preservation: If the moisture content reaches 13% or more, there is a danger of heat and mildew at any time, and immediate measures should be taken to reduce the moisture content. 2. Sealed Hypoxic Pharmacy Preservation: Rapeseed has a high moisture content at the time of new harvest. This method can be used for short-term preservation if it cannot dry in the rainy days. The method is: tightly sealed with a plastic film, natural oxygen reduction within 2-3 weeks, the accumulation of carbon dioxide to inhibit the rapeseed itself and microbial respiration, so as to achieve the purpose of preservation. Fumigation with an aluminum phosphide tablet at a rate of 9-12 g/m3 can kill and suppress mold and prevent rapeseed from heating and sprouting. Note that this method has a certain impact on the quality of rapeseed, such as lower oil yield, higher acid prices.
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