Overwintering seeds requires specialized technical know-how, as different seed varieties demand distinct storage methods.
To regularly test the germination rate of cucumber seeds, cucumber seed samples should be taken at fixed intervals and from specific storage layers for germination tests based on actual inventory conditions. Germination tests are mandatory before cucumber seeds are put into storage and prior to their release from storage, to guarantee the quality of seeds used in field cultivation.
Conduct thorough inspections for pests and diseases on cucumber seeds. Frequent checks are needed to determine whether cucumber seeds have sustained damage from pests or rodents. Effective measures such as pesticide spraying and seed cleaning and processing should be adopted to eliminate pests and pathogens.
There are four taboos for cucumber seed storage: first, do not store cucumber seeds in plastic bags; second, avoid mixed storage with pesticides and chemical fertilizers; third, prevent exposure to smoke fumes; fourth, keep cucumber seeds from making direct contact with the ground.
Bag-stored cucumber seeds must be clearly marked, with consistent labels both inside and outside each bag. Key indicators including variety, purity, moisture content, germination rate and seed source shall be clearly stated on the labels.
Avoid abrupt relocation of stored cucumber seeds. Cucumber seeds stored outdoors must not be suddenly moved indoors, and those stored indoors should not be transferred outdoors abruptly. Sharp temperature fluctuations will reduce the germination rate of cucumber seeds.
Ensure seeds entering storage meet the safe moisture content standards. The safe moisture content range stands at 12% to 15% for cereal crop seeds, 8% to 10% for peanut seeds, and 65% to 80% for tuber crop seeds. During winter storage, seed moisture content fluctuates along with ambient temperature and humidity. Therefore, regular moisture testing of seeds is essential to prevent seed deterioration.