Rape seed storage characteristics: strong hygroscopicity. Seed coat of rapeseed is crisp, loose, and fine. Usually we will use the seed wind analyzer to select superior rapeseed seeds in order to improve the quality of seeds on the market. Rapeseed harvest is near the rainy season, it is easy to absorb moisture, but it is also easy to release moisture in the dry climate. Poor ventilation, easy to heat. Rapeseed seeds are nearly circular and have a high density, generally more than 60%, and are not easy to dissipate heat from the outside. Rapeseed seeds, on the other hand, have a strong metabolic effect and emit more calories. The fevered seeds not only lost the germination rate, but also the oil content rapidly decreased. Contains more oil, easy to rancidity. Rape seeds have a high fat content, typically 36% to 42%. During the storage process, the unsaturated fatty acids in the fat will be automatically oxidized to aldehydes, ketones and other substances, resulting in rancidity.
Storage method: timely harvest, timely drying. Rapeseed harvesting is best when 70% to 80% of the pods in the scapes are yellow. After threshing, it must be dried in time, and it must be cooled and cooled before entering the warehouse to prevent the internal temperature of the seed reactor from being too high and dry heat phenomenon occurs. Remove sediment impurities. Rape seeds should be selected once before being stored in the warehouse to remove dust, dirt, germs and the like, which can enhance the stability during storage. Usually, we will use the seed winnower to conduct winnowing. Strictly control the storage moisture. Rapeseed seed moisture control is 9% to 10% to ensure safety. However, if the local high temperature and humidity and poor warehouse conditions, it is best to control the moisture within 9%. The moisture in the warehouse is different from that in the soil moisture. The soil moisture can be measured directly by the soil moisture meter. The soil moisture meter contains a moisture sensor, and the warehouse moisture needs a related recorder such as a temperature and humidity recorder. Low temperature storage. In addition to the need to control moisture during storage, the seed temperature is also an important factor. It must be controlled strictly according to the season. Generally it should not exceed 30°C in the summer, 15°C in the spring and autumn and 8°C in the winter. If the temperature difference between the seed temperature and the storage temperature exceeds 5°C, measures should be taken to reduce the ventilation temperature. Stacked reasonably. The height of the bulk of rape seed should increase or decrease with the amount of moisture, and the pile height should not exceed 2 m. Rapeseed seeds should be packed into various forms of ventilation piles, such as "gong" shape, "well" shape, etc., if bagged storage is used. Strengthen management and inspection. Even if the rape seed enters the warehouse, even if the water is low, the impurities are few, and the warehouse conditions meet the requirements, a certain strict inspection system must still be observed during the storage period.
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