North corn seed safe winter storage method 2

4 matters needing attention

4.1 pay attention to control the seed moisture content, germination rate

The quality of seed storage depends largely on the seed moisture content. Low temperature is an advantageous condition for seed storage, but before the cold weather in the north arrives, seeds can only be fully dried to prevent freezing damage. During storage and storage, the moisture content must always be kept below 14%, and the seeds can safely pass winter. If the moisture content of corn seed is too high, various enzymes in the seed will undergo metabolism and the respiratory capacity will be strengthened. Under severe cold conditions, the seeds will freeze damage and reduce or lose the ability to germinate. According to relevant data, when the corn seed moisture content is less than 14%, the outdoor temperature does not reduce the germination rate below -40°C; when the water content is 19%, the outdoor temperature is -12-8°C. Under the conditions, the germination power was lost only after 8 days. When the water content was 30%, only 2 days later, all of them were frozen to death under the same outdoor temperature.

Northern corn seed has a long winter storage time. Therefore, check the seed moisture regularly during storage. If it is found that the moisture exceeds safe storage standards, it should be ventilated and ventilated in time to adjust the temperature and humidity so as to prevent the seeds from freezing or mildew.

4.2 Have reasonable storage and storage methods to create a good storage environment

The reasonable storage method directly affects the storage effect. Storage methods are generally more suitable for storage in the cold room and can also be stored outdoors, but care should be taken to prevent rain and snow from leaching. Regardless of the method used for storage, the seed bag should be placed more than 30cm above the ground, leaving a certain gap between the stacks. It should also be noted that seed stored outdoors should not be transferred to indoor after being exposed to cold; seeds that are also stored indoors should not be suddenly transferred to the outdoors. Otherwise, a hot and cold temperature change will be caused by freezing and damage to the seeds.

Warehouses with poor storage conditions should be maintained. Seed warehouses should be clean and clean inside and outside the warehouse. The warehouses should not leak rain and snow. Outdoor storage can not be stored in the open air where rain and snow leaching. We must also do a good job of pest control and rat-proof work. Before the new warehouse is placed, it must be disinfected to kill the pests that cross over the warehouse seams, seams, and boards.

4.3 Regular inspection during seed storage

During the seed storage period, regular inspections should be conducted on the preservation method, moisture content, temperature, and germination rate. Due to the long winter storage time of seeds, during the entire seed storage process, the moisture content of the seed itself may be greatly affected by the temperature and humidity in the air. Therefore, the inspection should focus on the following three aspects: Check whether the seeds are damp; Second, check whether the seeds are bitten by insects and mice; Third, check the seed germination rate and germination potential regularly. If a problem is found, the cause should be identified and remedial measures should be taken promptly.