1 Strictly control the moisture content The corn seed has a high moisture content in the early stage of harvest. After a period of natural air drying or mechanical drying, the moisture content of the seed is gradually reduced. However, before the arrival of the cold weather in mid-to late October, the water content must be reduced to the safe moisture required by the seeds, that is, the water content must fall below 14%, so that the seeds can safely pass winter. If the water content is too high, various enzymes in the seed will undergo metabolism and the respiratory capacity will be strengthened. When the temperature is too low, the seeds will be subjected to freezing injury, and some or all of them will lose their ability to germinate. The second year will be planted in the fields. There will be incomplete emergence or no emergence. 2 Pay attention to improving the seed quality If the seeds contain more immature or broken seeds, and other large amounts of dust and other impurities, it will bring adverse consequences for the safe storage of seeds, and we must pay attention to maintaining the purity and purity of the seeds during storage. . 3 Strictly control the temperature If the seed moisture content meets the requirement of safe moisture, and the seed maturity is good, it can tolerate the minimum temperature to invade it for a long time. Such seeds can be stored in the dry cold storage for a long time without affecting their germination ability. If the moisture content of maize seeds is above 14%, effective management measures should be taken. Such seeds should be stored in the environment with temperatures above zero and should be sown until the following year. The temperature should not be lower than zero. Below zero degrees, seeds may be chilled, lose their ability to germinate, or reduce their ability to germinate. 4 maintain good ventilation, to achieve no leakage, no moisture under the corn seed has a significant moisture absorption, even if the dry seeds, encounter rain, snow cover or smoke fumigation, there will be anti-tide phenomenon will also Reduce the germination rate of corn seeds. Therefore, do not pile up on the ground. It must be damp-proof. Use sacks or other containers with seeds to remove wood from the floor more than 50 cm away from the floor. Keep the interior dry and well ventilated. Even if the seeds are often in a dry state, they must be often Perform artificial wind. Keep seeds on the outside and cover them with a cover to prevent snow cover. 5 It is forbidden to use plastic bags to pack seeds. Because the plastic bags are airtight, the seeds will be isolated from the air, and the seeds will not be able to breathe. At the same time, the carbon monoxide exhaled by the seeds will not be able to be discharged. For a long time, the carbon dioxide in the bags will accumulate too much and cause carbon dioxide. Poisoning; In addition, the moisture of the seeds themselves and the heat generated by the respiration do not spread out, causing the seeds to be heated and mildewed. 6 Do not mix seeds with pesticides and nitrogen fertilizers. Some people have convenient plans. The corn seeds, pesticides, and nitrogen fertilizers bought are all stored together. Some of them even put seeds directly on pesticides or fertilizers. This is Very unscientific. Some pesticides have a toxic effect on seeds. Long-term seed and pesticide combination will not only affect the seed germination rate, but also cause physiological changes in corn seed. The hybrids planted in the following year may also appear abnormal. Nitrogen fertilizers Ammonium nitrogen, which is volatile, emits very strong ammonia. When the ammonia concentration is high, the embryo will be killed and the seeds will lose their vitality. 7 Periodically check the storage period of the seeds According to different seasons, regularly check the preservation method, moisture content, temperature, germination rate, etc., and focus on three aspects: first, check the seeds for moisture; second, check whether the seeds are insects or not. Rats bite; Third, regularly check the seed germination rate and germination potential. 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 of the air. Regular inspections are essential.
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