1. The cellaring method involves selecting a leeward, sunny area with slightly elevated terrain and low groundwater levels for digging. The size of the pit depends on the amount of seeds to be stored, local topography, and soil quality. A typical 2.5 cubic meter cellar can hold about 250 kg of rice seeds. The depth of the pit should ideally be between 1.5 to 2 meters. If the pit is too deep, the temperature inside may rise, causing an increase in groundwater levels and moisture content in the seeds, which could lead to spoilage. The ideal cellar volume is around 2 cubic meters, and the soil volume should not exceed 3 cubic meters. Long-shaped cellars are preferable to circular ones because they better align with ground temperature, allowing for natural temperature regulation without causing overheating or deterioration of the seeds. Before storing, it's recommended to freeze a 3–6 cm layer of soil on top of the pit, while ensuring that the cellar itself has a thawed layer of 6–10 cm. Storing too early, when temperatures are still unstable, can expose seeds to freezing conditions, reducing their germination rate. On the other hand, removing seeds too late can result in rising temperatures and increased groundwater, leading to dampness and lower seed viability. After placing the seeds in the cellar, they should be covered with a cold layer and not exposed immediately, as this could damage the seed coat and lower the germination rate. It’s best to gradually air-dry them before drying them completely, which helps improve the germination rate. (China Rural Forum)
2. Warm storage involves using heating equipment in the warehouse, such as adding a furnace or a ground fire wall. When the temperature drops to its lowest, it's necessary to provide warmth, especially during the early morning hours when temperatures are at their coldest. The storage temperature should be adjusted based on the moisture level of the seeds. If the moisture is low, the temperature can be kept lower, but if the moisture is high, the temperature should be increased accordingly. For seeds with around 16% moisture content, the storage temperature should be maintained between 0°C and 5°C. (China Rural Forum)
3. In households, seeds can be stored in the living room by placing a board 15 to 30 cm high on the floor, or arranging boards north-south, and placing 3 to 5 bags of seeds on the board for winter storage. This method is essentially a form of greenhouse preservation. Since the room temperature is relatively stable and higher, and the air is drier, the seeds can gradually lose moisture, making the storage safer and helping maintain a higher germination rate. During the storage period, avoid moving the seeds in and out of the house, and do not store them in rooms where there is a lot of moisture from cooking, as this can increase seed moisture and reduce their germination ability. (China Rural Forum)
4. The cold storage method is suitable for seeds with moisture content below 14%. This method is typically used in libraries or dedicated storage areas. If the warehouse floor is not solid, cushions and wooden planks should be placed on it. Grass curtains and mats are then used to cover the area and prevent moisture from rising. Once the curtains are closed and grass curtains are placed around the perimeter, straw covers should also be added on top of the mat. (China Rural Forum)
5. For seeds with low moisture content, the outdoor open storage method is a viable option. Choose a sheltered location that is elevated and protected from wind. Lay grass at the base of wooden frames, spread 15 to 30 cm of dry straw, then place straw curtains or mats over it. Surround the area with straw and place the seeds in the center, stacking them 2 to 3 meters high, then cover everything tightly with more straw and a final layer on top. Because the northern and western sides are more affected by wind and cold, leading to lower germination rates compared to the eastern and southern sides, it's important to thicken the protective layer on the north and west sides. (China Rural Forum)
Disposable Piercing Guide - WPTC10
Product Description
Disposable surgical medical products refer to items used in surgical operations, which are discarded after one use. These products are used to maintain a sterile environment and prevent the spread of infection during surgery.
Some common disposable surgical medical products include:
1. Surgical masks: used to cover the mouth and nose of medical staff during operations to prevent the spread of germs.
2. Surgical gowns: Medical staff wear these to protect their clothing from contamination during surgery.
3. Surgical Gloves: Healthcare providers wear these gloves to protect their hands from contamination during surgery.
4. Surgical Drape: Used to cover the patient and create a sterile field around the surgical site.
5. Surgical needles: Used to suture incisions and wounds during surgery.
6. Scalpel blades: These are used to make incisions during surgery.
7. Surgical Forceps: Used to grasp and manipulate tissue during surgery.
8. Surgical catheters: These catheters are used to drain fluids from the body during surgery.
Overall, single-use surgical medical products are critical to maintaining a sterile environment and preventing the spread of infection during surgery.
Disposable Use Puncture Guider,All Laparoscopic Instruments,Keyhole Surgery Instruments
Changzhou Weipu Medical Devices Co., Ltd. , https://www.cnweipumedical.com