Please open the bagged seeds before sowing. Seeds can be stored for a long time after being dried. Dryness varies with species and varieties. Once opened, seeds will inhale air, which will make their life span lose quickly. In short, it is safest to open Kaifeng before sowing.
Corn seeds must be put into storage, cleaned and dried before storage, so that the moisture content can be reduced to below 14%. The drying time is from late April to mid-May when the temperature rises rapidly in spring. When the seed is put into storage, the temperature of the seed itself should not be too high, and it must be lowered below the warehouse temperature. If the temperature of the seeds dried on that day is high, then the temperature of the seeds is bound to be high, so it is best not to put them in storage that day. Otherwise, it is easy to cause local heating of the seeds in the barn, leading to mildew of the seeds.
paddy field
In the pit storage method, the place with leeward and sunny, slightly higher terrain and low groundwater level is selected to dig the pit. The size of the cellar depends on seed storage, topography and soil quality. Generally, 2.5 cubic meters of cellar capacity can store 250 kilograms of rice seeds. The suitable pit depth is1.5 ~ 2.0m. If the pit is dug too deep, the pit temperature will rise, the groundwater will rise and the water content of seeds will increase. The cellar capacity should be about 2 cubic meters, and the soil quality should not exceed 3 cubic meters. Long cellar is better than round cellar, easy to get close to the ground temperature, natural temperature control, no fever, no rotten seeds. In into the pit stage, the soil layer should be frozen 3 ~ 6 cm thick, and the time to get out of the pit is 6 ~ 10 cm. It is easy to reduce the germination rate because of the low temperature in the temperature change because of the premature cellar exit and unstable temperature. When you leave the cellar too late, the yang will rise, the groundwater will increase, and the seeds will be susceptible to moisture and the vitality will decrease. The seeds out of the cellar should be covered with cold protection, and should not be exposed to the sun immediately, which will cause skin breakage and reduce the germination rate. Seeds should be gradually air-dried before drying, which can improve the germination rate.
2. Warehousing method Warehousing is to add heating equipment in the warehouse, usually adding a stove or a fire wall with a fire dragon. Make a fire at the lowest temperature and raise the temperature appropriately, especially at dawn when the temperature is low. The temperature of the sink should be determined according to the water content of the seeds. If the water content is small, the tank temperature can be low, and if the water content is large, the tank temperature can be high. When the seed content is about 65438 06%, the temperature of the water tank should be kept between 0 ~ 5℃.
3. Household storage method Put 3 ~ 5 bags of seeds on the wooden board with a height of 0/5 ~ 30 cm at the top of the kang in the living room or between the south and north kang for winter. This method is actually a kind of greenhouse storage. Because the room temperature is high and stable, and the air is dry, the water content of seeds can be gradually reduced, so it is safer and can maintain the high germination rate of seeds. During storage, indoor and outdoor access is prohibited, and it is not allowed to be stored in a room with cooking stoves and high humidity, so as to avoid large temperature fluctuations, increase moisture, stimulate seeds and reduce germination ability.
Finally, potatoes.
The rapid storage of potatoes is quite different from the storage of food crops. It is easier to store the seeds of cereal crops only when they reach a safe water content. The water content of harvested potato tubers is generally about 80%, which is easy to be infected by bacteria and rot during storage. High temperature is easy to hurt heat and low temperature is easy to freeze. As potato tuber is not only a vegetative organ, but also a reproductive organ, scientific management methods should be adopted to minimize losses.
The warehouse requires ventilation and dryness. The temperature is controllable. The floors and walls of the warehouse are disinfected with lime water. And fumigated with formaldehyde and potassium permanganate (500g potassium permanganate and 700ml formaldehyde solution per120m2). Potato seed preparation: pick out rotten potatoes, diseased potatoes, frozen potatoes and injured potatoes, and put the good potatoes in a well-ventilated bag for preservation. Preserved seed potatoes should be cut into pieces 1-2 days before sowing, or cut with seeds. It is not advisable to cut them too early to prevent seeds from rotting.
In a word, scientific management methods should be implemented in the storage process of potato seed potatoes, and the temperature, humidity and ventilation conditions in the warehouse should be strictly controlled to ensure the quality of seed potatoes, reduce the natural loss during storage and provide qualified seed potatoes.